Optical module

Abstract

The optical module provided by the invention comprises a circuit board and an optical receiving part. The light receiving component comprises a substrate, an optical fiber adapter, a light receiving chip, a refraction piece and a light splitting assembly. The light splitting assembly comprises a light splitting unit, and the light splitting unit comprises a filtering piece and a reflecting piece. In the same light splitting unit, the transmission wavelength and the reflection wavelength of the filtering piece are different wavelengths, and the reflection wavelength of the filtering piece and the reflection wavelength of the reflection piece are the same wavelength, so that light splitting is realized. And the reflecting piece is arranged on the light emitting path of the wavelength reflected by the filtering piece so as to change the transmission direction of the wavelength reflected by the filtering piece and reflect the wavelength reflected by the filtering piece to realize light splitting. According to the invention, light splitting and receiving of multiple paths of light signals can be realized through the light splitting units.

Description

Optical module

[0001] This application claims priority to the application filed on April 30, 2024 with the China Patent Office, application number 202410542936.0; the application filed on September 13, 2024 with the China Patent Office, application number 202411288488.2; the application filed on December 31, 2024 with the China Patent Office, application number 202411997056.9; the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the field of optical communication technology, and in particular to an optical module. BACKGROUND

[0003] With the development of new business and application modes such as cloud computing, mobile Internet, video, etc., the progress of optical communication technology becomes increasingly important. In optical communication technology, the optical module, as one of the key devices in optical communication equipment, can realize optical-electrical signal conversion; in the development process of optical communication technology, the data transmission rate of the optical module is required to be continuously improved. SUMMARY

[0004] The present disclosure provides an optical module, comprising:

[0005] a circuit board;

[0006] an optical receiving component electrically connected to the circuit board, the optical receiving component comprising:

[0007] a first substrate;

[0008] an optical fiber adapter arranged on the surface of the first substrate and configured to receive a bundle of optical signals including at least a first wavelength and a second wavelength;

[0009] optical receiving chips arranged in an array, the optical receiving direction of the optical receiving chips being perpendicular to the surface of the circuit board; the optical receiving chips are configured to convert the received optical signals into electrical signals;

[0010] a light folding member arranged on the surface of the first substrate and located on the light-in path of the optical receiving chips; the light folding member is configured to change the transmission direction of the optical signals output by the optical fiber adapter to be consistent with the optical receiving direction of the optical receiving chips;

[0011] a light splitting assembly arranged on the surface of the first substrate and arranged between the light-out light path of the optical fiber adapter and the light-in light path of the light folding member; the light splitting assembly is configured to split the optical signals output by the optical fiber adapter into multiple optical signals; the light splitting assembly comprises a light splitting unit, the light splitting unit comprises a filter and a reflector, the filter and the reflector are respectively arranged obliquely relative to the surface of the first substrate, and the filter is arranged away from the optical fiber adapter relative to the reflector;

[0012] The filter transmits a wavelength and reflects a wavelength, and the filter reflects a wavelength and the reflector reflects a wavelength.

[0013] The reflector is arranged on the light path of the wavelength reflected by the filter in the same light splitting unit. When the light splitting assembly includes one light splitting unit, the reflector reflects the wavelength reflected by the filter in the same light splitting unit towards the light folding piece to realize light splitting. When the light splitting assembly includes multiple light splitting units, the reflector reflects the wavelength reflected by the filter in the same light splitting unit towards the filter in the next light splitting unit to realize light splitting.

[0014] The filters in the multiple light splitting units form a first lens array, and the first lens array is located between the reflector and the light folding piece and includes at least a first lens and a second lens. The first lens is located on the light path of the fiber adapter. The first lens includes a first filter surface and a first converging surface, and the second lens includes a second filter surface and a second converging surface. The first filter surface faces the fiber adapter and the reflector, and the first converging surface faces the light folding piece. The second filter surface faces the reflector, and the second converging surface faces the light folding piece.

[0015] The first filter surface transmits the first wavelength of the light signal including at least the first wavelength and the second wavelength to the first converging surface, and reflects the second wavelength of the light signal to the surface of the reflector. The first converging surface is configured to converge and transmit the first wavelength of the light signal to the light folding piece.

[0016] The second filter surface receives the second wavelength of the light signal output by the reflector, and transmits the second wavelength of the light signal to the second converging surface. The second converging surface is configured to converge and transmit the second wavelength of the light signal to the light folding piece. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings used in some embodiments of the present disclosure. Obviously, the drawings in the following description are only some drawings of the embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual time sequence, etc. of the product involved in the embodiments of the present disclosure.

[0018] FIG. 1 is a partial architecture diagram of an optical communication system according to some embodiments of the present disclosure;

[0019] FIG. 2 is a partial structure diagram of a host computer according to some embodiments of the present disclosure;

[0020] FIG. 3 is a structure diagram of an optical module according to some embodiments of the present disclosure;

[0021] FIG. 4 is an exploded view of an optical module according to some embodiments of the present disclosure;

[0022] FIG. 5 is an internal structure diagram of an optical module according to some embodiments of the present disclosure;

[0023] FIG. 6 is a cross-sectional structure diagram of an optical transmitting component according to some embodiments of the present disclosure;

[0024] FIG. 7 is a cross-sectional exploded structure diagram of an optical transmitting component according to some embodiments of the present disclosure;

[0025] FIG. 8 is a cross-sectional structure diagram of an optical receiving component according to some embodiments of the present disclosure;

[0026] FIG. 9 is a structure diagram of an optical receiving component according to some embodiments of the present disclosure;

[0027] FIG. 10 is a structure diagram of an optical receiving component corresponding to a light splitting assembly according to some embodiments of the present disclosure;

[0028] FIG. 11 is a top view of an optical receiving component corresponding to a light splitting assembly according to some embodiments of the present disclosure;

[0029] FIG. 12 is a side view of an optical receiving component corresponding to a light splitting assembly according to some embodiments of the present disclosure;

[0030] FIG. 13 is a side view of an optical receiving component corresponding to a light splitting assembly according to some embodiments of the present disclosure;

[0031] FIG. 14 is a top view of an optical receiving component corresponding to a light splitting assembly according to some embodiments of the present disclosure;

[0032] FIG. 15 is a structure diagram of a light folding piece according to some embodiments of the present disclosure;

[0033] FIG. 16 is a schematic diagram of a relative position relationship between a filter and a reflector in a light splitting assembly according to some embodiments of the present disclosure;

[0034] FIG. 17 is an optical path diagram of an optical receiving component according to some embodiments of the present disclosure;

[0035] FIG. 18 is an optical path diagram of an optical receiving component according to some embodiments of the present disclosure;

[0036] FIG. 19 is a structure diagram of a substrate according to some embodiments of the present disclosure;

[0037] FIG. 20 is a schematic diagram of a lens disposed on a surface of a substrate according to some embodiments of the present disclosure;

[0038] FIG. 21 is a structural diagram of an optical receiving component according to some embodiments of the present disclosure;

[0039] FIG. 22 is a structural diagram of another optical receiving component according to some embodiments of the present disclosure;

[0040] FIG. 23 is a structural diagram of yet another optical receiving component according to some embodiments of the present disclosure;

[0041] FIG. 24 is a structural diagram of a light folding component according to some embodiments of the present disclosure;

[0042] FIG. 25 is a structural diagram of another light folding component according to some embodiments of the present disclosure;

[0043] FIG. 26 is a structural diagram of another light folding component according to some embodiments of the present disclosure;

[0044] FIG. 27 is a structural diagram of yet another light folding component according to some embodiments of the present disclosure;

[0045] FIG. 28 is a structural diagram of yet another light folding component according to some embodiments of the present disclosure;

[0046] FIG. 29 is a schematic diagram of an optical path corresponding to a light folding component according to some embodiments of the present disclosure;

[0047] FIG. 30 is a schematic diagram of an optical path corresponding to another light folding component according to some embodiments of the present disclosure;

[0048] FIG. 31 is a schematic diagram of an optical path corresponding to yet another light folding component according to some embodiments of the present disclosure;

[0049] FIG. 32 is a schematic diagram of an optical path corresponding to an optical receiving component according to some embodiments of the present disclosure;

[0050] FIG. 33 is a schematic diagram of an optical path corresponding to another optical receiving component according to some embodiments of the present disclosure;

[0051] FIG. 34 is a schematic diagram of an optical path corresponding to yet another optical receiving component according to some embodiments of the present disclosure;

[0052] FIG. 35 is a schematic diagram of angle derivation corresponding to a light folding component according to some embodiments of the present disclosure;

[0053] FIG. 36 is a schematic diagram of angle derivation corresponding to another light folding component according to some embodiments of the present disclosure;

[0054] FIG. 37 is a schematic diagram of angle derivation corresponding to yet another light folding component according to some embodiments of the present disclosure

[0055] FIG. 38 is a structural diagram of an optical receiving component according to some embodiments of the present disclosure;

[0056] FIG. 39 is a structure diagram of a light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0057] FIG. 40 is a structure diagram of a light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0058] FIG. 41 is an optical path diagram of a light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0059] FIG. 42 is a schematic diagram of an optical path according to some embodiments of the present disclosure;

[0060] FIG. 43 is a structure diagram of a light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0061] FIG. 44 is an optical path diagram of a light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0062] FIG. 45 is a schematic diagram of an optical path according to some embodiments of the present disclosure;

[0063] FIG. 46 is a structure diagram of another light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0064] FIG. 47 is a structure diagram of another light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0065] FIG. 48 is an optical path diagram of another light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0066] FIG. 49 is a structure diagram of another light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0067] FIG. 50 is an optical path diagram of another light receiving component implementing light splitting according to some embodiments of the present disclosure;

[0068] FIG. 51 is an exploded view of an internal structure of another optical module according to some embodiments of the present disclosure;

[0069] FIG. 52 is an exploded view of a light emitting component according to some embodiments of the present disclosure;

[0070] FIG. 53 is an optical path diagram of a light emitting component according to some embodiments of the present disclosure;

[0071] FIG. 54 is a structure diagram of a laser assembly according to some embodiments of the present disclosure;

[0072] FIG. 55 is a structure diagram of a circuit board according to some embodiments of the present disclosure;

[0073] FIG. 56 is a partial view of an internal structure of an optical module according to some embodiments;

[0074] FIG. 57 is a partial view of an internal structure of an optical module according to some embodiments;

[0075] FIG. 58 is a structural view of a circuit board from another perspective according to some embodiments;

[0076] FIG. 59 is a partial view of an internal structure of an optical module from another perspective according to some embodiments;

[0077] FIG. 60 is a sectional view of an internal structure of an optical module according to some embodiments;

[0078] FIG. 61 is a sectional view of an internal structure of an optical module from another perspective according to some embodiments. DETAILED DESCRIPTION

[0079] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided in the present disclosure, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0080] Unless otherwise required by the context, throughout the specification and claims, the term "comprising" is to be interpreted as open, inclusive, meaning "including, but not limited to"; the terms "first", "second" are not to be interpreted as indicating or implying relative importance or indicating the upper limit of the number; the term "multiple" means two or more; the term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated, can be directly connected, or indirectly connected through an intermediate medium; the use of the terms "adapted for" or "configured for" means open and inclusive language, which does not exclude devices adapted for or configured to perform additional tasks or steps; the terms "parallel", "vertical", "same", "consistent", "flush" and the like are not limited to absolute mathematical relationships, but also include acceptable error ranges generated in practice, and also include differences based on the same design concept but due to manufacturing reasons.

[0081] In optical communication technology, in order to establish information transmission between information processing devices, information needs to be loaded onto light, and the transmission of information is achieved by using the propagation of light. Here, the light loaded with information is an optical signal. The optical signal can reduce the loss of optical power during transmission in the information transmission device, so as to achieve high-speed, long-distance, low-cost information transmission. The signal that can be recognized and processed by the information processing device is an electrical signal. The information processing device usually includes an optical network unit (ONU), a gateway, a router, a switch, a mobile phone, a computer, a server, a tablet computer, a television, etc., and the information transmission device usually includes an optical fiber and an optical waveguide, etc.

[0082] The optical module can realize the mutual conversion between the optical signal and the electrical signal between the information processing device and the information transmission device. For example, at least one of the optical signal input end or the optical signal output end of the optical module is connected with an optical fiber, and at least one of the electrical signal input end or the electrical signal output end of the optical module is connected with an optical network unit; a first optical signal from the optical fiber is transmitted to the optical module, the optical module converts the first optical signal into a first electrical signal, and transmits the first electrical signal to the optical network unit; a second electrical signal from the optical network unit is transmitted to the optical module, the optical module converts the second electrical signal into a second optical signal, and transmits the second optical signal to the optical fiber. Since multiple information processing devices can transmit information through electrical signals, at least one of the multiple information processing devices needs to be directly connected with the optical module, without the need for all the information processing devices to be directly connected with the optical module. Here, the information processing device directly connected with the optical module is referred to as the host computer of the optical module. In addition, the optical signal input end or the optical signal output end of the optical module can be referred to as an optical port, and the electrical signal input end or the electrical signal output end of the optical module can be referred to as an electrical port.

[0083] FIG. 1 is a partial structure diagram of an optical communication system according to some embodiments. As shown in FIG. 1, the optical communication system mainly includes a remote information processing device 1000, a local information processing device 2000, a host computer 100, an optical module 200, an optical fiber 101, and a network cable 103.

[0084] One end of the optical fiber 101 extends towards the remote information processing device 1000, and the other end of the optical fiber 101 is connected with the optical module 200 through the optical port of the optical module 200. The optical signal can be totally reflected in the optical fiber 101, and the propagation of the optical signal in the total reflection direction can almost maintain the original optical power. The optical signal undergoes multiple total reflections in the optical fiber 101 to transmit the optical signal from the remote information processing device 1000 to the optical module 200, or to transmit the optical signal from the optical module 200 to the remote information processing device 1000, thereby realizing long-distance, low-power loss information transmission.

[0085] The optical communication system can include one or more optical fibers 101, and the optical fiber 101 is detachably connected with the optical module 200, or fixedly connected. The host computer 100 is configured to provide a data signal to the optical module 200, or receive a data signal from the optical module 200, or monitor or control the working state of the optical module 200.

[0086] The host computer 100 includes a housing in the shape of a cuboid, and an optical module interface 102 disposed on the housing. The optical module interface 102 is configured to access the optical module 200, so that the host computer 100 and the optical module 200 establish a unidirectional or bidirectional electrical signal connection.

[0087] The host computer 100 also includes an external electrical interface, which can access an electrical signal network. For example, the external electrical interface includes a universal serial bus (USB) or a network cable interface 104, which is configured to access a network cable 103, so that the host computer 100 and the network cable 103 establish a unidirectional or bidirectional electrical signal connection. One end of the network cable 103 is connected to a local information processing device 2000, and the other end of the network cable 103 is connected to the host computer 100, so as to establish an electrical signal connection between the local information processing device 2000 and the host computer 100 through the network cable 103. For example, a third electrical signal from the local information processing device 2000 is transmitted to the host computer 100 through the network cable 103, and the host computer 100 generates a second electrical signal according to the third electrical signal. The second electrical signal from the host computer 100 is transmitted to the optical module 200, and the optical module 200 converts the second electrical signal into a second optical signal, and transmits the second optical signal to the optical fiber 101. The second optical signal is transmitted to a remote information processing device 1000 in the optical fiber 101. For example, a first optical signal from the remote information processing device 1000 is transmitted through the optical fiber 101, and the first optical signal from the optical fiber 101 is transmitted to the optical module 200. The optical module 200 converts the first optical signal into a first electrical signal, and transmits the first electrical signal to the host computer 100. The host computer 100 generates a fourth electrical signal according to the first electrical signal, and transmits the fourth electrical signal to the local information processing device 2000. It should be noted that the optical module is a tool for converting optical signals and electrical signals, and the information does not change in the conversion process of the optical signals and the electrical signals, and the encoding and decoding mode of the information can change.

[0088] In addition to including an optical network terminal, the host computer 100 also includes an optical line terminal (OLT), an optical network terminal (ONT), or a data center server, etc.

[0089] Figure 2 is a partial structural diagram of a host computer according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, Figure 2 only shows the structure of the host computer 100 related to the optical module 200. As shown in Figure 2, the host computer 100 further comprises a PCB circuit board 105 arranged in the shell, a cage 106 arranged on the surface of the PCB circuit board 105, a heat sink 107 arranged on the cage 106, and an electrical connector arranged inside the cage 106. The electrical connector is configured to access the electrical port of the optical module 200; the heat sink 107 has a protruding structure such as fins to increase the heat dissipation area.

[0090] The optical module 200 is inserted into the cage 106 of the host computer 100, and the optical module 200 is fixed by the cage 106. The heat generated by the optical module 200 is conducted to the cage 106, and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected with the electrical connector inside the cage 106, thereby establishing a bidirectional electrical signal connection between the optical module 200 and the host computer 100. In addition, the optical port of the optical module 200 is connected with the optical fiber 101, thereby establishing a bidirectional optical signal connection between the optical module 200 and the optical fiber 101.

[0091] Figure 3 is a structural diagram of an optical module according to some embodiments, and Figure 4 is an exploded view of an optical module according to some embodiments. As shown in Figures 3 and 4, the optical module 200 comprises a shell, a circuit board 300 arranged in the shell, a light emitting component 400, and a light receiving component 500. However, the present disclosure is not limited thereto, and in some embodiments, the optical module 200 comprises one of the light emitting component 400 and the light receiving component 500.

[0092] The shell comprises an upper shell 201 and a lower shell 202, the upper shell 201 covers the lower shell 202 to form the above-mentioned shell having two openings 204 and 205; the outer contour of the shell generally presents a square body.

[0093] In some embodiments, the lower shell 202 comprises a bottom plate 2021 and two lower side plates 2022 arranged perpendicularly to the bottom plate 2021 on both sides of the bottom plate 2021; the upper shell 201 comprises a cover plate 2011, and the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.

[0094] In some embodiments, the lower shell 202 comprises a bottom plate 2021 and two lower side plates 2022 arranged perpendicularly to the bottom plate 2021 on both sides of the bottom plate 2021; the upper shell 201 comprises a cover plate 2011 and two upper side plates arranged perpendicularly to the cover plate 2011 on both sides of the cover plate 2011, and the two upper side plates are combined with the two lower side plates 2022 to realize that the upper shell 201 covers the lower shell 202.

[0095] The direction of the line connecting the two openings 204 and 205 can be consistent with the length direction of the optical module 200, or can be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 (the left end of FIG. 3), and the opening 205 is also located at the end of the optical module 200 (the right end of FIG. 3). Alternatively, the opening 204 is located at the end of the optical module 200, and the opening 205 is located at the side of the optical module 200. The opening 204 is an electrical port, and the gold fingers 301 of the circuit board 300 extend from the electrical port and are inserted into the electrical connector of the host computer 100; the opening 205 is an optical port configured to access the external optical fiber 101, so that the optical fiber 101 connects the optical transmitting component 400 and the optical receiving component 500 in the optical module 200.

[0096] The assembly of the upper shell 201 and the lower shell 202 facilitates the installation of the circuit board 300, the optical transmitting component 400, the optical receiving component 500, etc. in the above-mentioned shells, and the above-mentioned devices can be encapsulated and protected by the upper shell 201 and the lower shell 202. In addition, when assembling the circuit board 300, the optical transmitting component 400, and the optical receiving component 500, etc., the positioning components, heat dissipation components, and electromagnetic shielding components of these devices can be deployed, which is beneficial to the automated production.

[0097] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials, which is beneficial to electromagnetic shielding and heat dissipation.

[0098] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside the shell thereof. The unlocking component 600 is configured to achieve the fixed connection between the optical module 200 and the host computer, or to release the fixed connection between the optical module 200 and the host computer.

[0099] For example, the unlocking component 600 is located outside the two lower side plates 2022 of the lower shell 202, and includes a clamping component matched with the cage 106 of the host computer 100. When the optical module 200 is inserted into the cage 106, the clamping component of the unlocking component 600 fixes the optical module 200 in the cage 106; when the unlocking component 600 is pulled, the clamping component of the unlocking component 600 moves, thereby changing the connection relationship between the clamping component and the host computer, to release the fixation between the optical module 200 and the host computer, so that the optical module 200 can be pulled out of the cage 106.

[0100] The circuit board 300 includes circuit traces, electronic components, and chips, etc. The electronic components and chips are connected according to circuit design through the circuit traces to realize power supply, electrical signal transmission, and grounding, etc. The electronic components may, for example, include capacitors, resistors, transistors, and Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs). The chips may, for example, include Microcontroller Units (MCUs), laser drive chips, Transimpedance Amplifiers (TIAs), limiting amplifiers, Clock and Data Recovery (CDR) chips, power management chips, and Digital Signal Processing (DSP) chips.

[0101] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize a bearing function, such as stably bearing the above-mentioned electronic components and chips. The rigid circuit board can also be inserted into the electrical connector in the cage 106 of the host computer 100.

[0102] The circuit board 300 also includes a gold finger 301 formed on the surface of the end thereof. The gold finger 301 is composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106, and the gold finger 301 is in conduction with the electrical connector in the cage 106. The gold finger 301 can be provided only on the surface (e.g., the upper surface shown in FIG. 4) of one side of the circuit board 300, or can be provided on the surfaces of both upper and lower sides of the circuit board 300 to provide a larger number of pins to adapt to occasions requiring a large number of pins. The gold finger 301 is configured to establish electrical connection with the host computer to realize power supply, grounding, Inter-Integrated Circuit (I2C) signal transmission, data signal transmission, etc. Of course, flexible circuit boards are also used in some optical modules. The flexible circuit board is generally used in cooperation with the rigid circuit board to supplement the rigid circuit board.

[0103] At least one of the light emitting component 400 or the light receiving component 500 is located on the side of the circuit board 300 away from the gold finger 301.

[0104] In some embodiments, the light emitting component 400 and the light receiving component 500 are physically separated from the circuit board 300, and then are electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connections, respectively.

[0105] In some embodiments, at least one of the light emitting component or the light receiving component can be directly disposed on the circuit board 300. For example, at least one of the light emitting component or the light receiving component can be disposed on the surface of the circuit board 300 or the side edge of the circuit board 300.

[0106] FIG. 5 is a diagram of an internal structure of an optical module according to some embodiments of the present disclosure. As shown in FIG. 5, in some embodiments, the light emitting component 400 and the light receiving component 500 are disposed side by side on the surface of the circuit board 300.

[0107] In some embodiments, the light emitting component 400 and the light receiving component 500 can also be arranged in a top-down relationship on the surface of the circuit board 300.

[0108] FIG. 6 is a diagram of a cross-sectional structure of a light emitting component according to some embodiments of the present disclosure; and FIG. 7 is a diagram of an exploded cross-sectional structure of a light emitting component according to some embodiments of the present disclosure. As shown in FIG. 6 and FIG. 7, in some embodiments, the surface of the circuit board has a notch 303, and the light emitting component 400 is embedded in the notch 303.

[0109] The light emitting component 400 can include a carrier 410. The carrier 410 serves as a support. The surface of the circuit board 300 has a notch 303, and the carrier 410 can be embedded in the notch 303.

[0110] The light emitting component 400 can include a TEC 420. The TEC 420 is disposed on the surface of the carrier 410.

[0111] The light emitting component 400 can include a laser 430. The laser 430 is disposed on the surface of the TEC 420. The laser 430 can be arranged in an array.

[0112] The light emitting component 400 can include a collimating lens 440. The collimating lens 440 is disposed on the surface of the TEC 420 and on the light path of the laser 430. The collimating lens 440 can be arranged in an array.

[0113] The light emitting component 400 can include an optical multiplexing assembly 450. The lasers 430 arranged in an array respectively emit light beams of different wavelengths, and then each light beam is combined by the optical multiplexing assembly 450, and finally output from the optical multiplexing assembly 450 in the form of a light beam.

[0114] The light emitting component 400 can include a converging lens 460. The converging lens 460 is disposed on the light path of the optical multiplexing assembly 450 and performs converging processing on the light signal output from the optical multiplexing assembly 450 to improve the optical coupling efficiency.

[0115] The light emitting component 400 can include a fiber adapter 470. The fiber adapter 470 is used to output the final light beam.

[0116] In some embodiments, the surface of the carrier 410 is formed with a plurality of surfaces of different heights to match the optical paths of the respective optical elements arranged on the surface.

[0117] Exemplarily, the surface of the carrier 410 is formed with a first carrier surface 411, a second carrier surface 412, and a third carrier surface 413.

[0118] Since the TEC 420 has a certain thickness, in order to ensure that the surface of the laser 430 is flush with the surface of the circuit board 300, thereby shortening the wire length between the two, and ensuring the high-frequency signal transmission performance, the position of the first carrier surface 411 is lower than the position of the second carrier surface 412, so as to form a groove on the carrier 410, and the TEC 420 is arranged in the groove, so as to sink the TEC 420, and thereby realize that the surface of the laser 430 is flush with the surface of the circuit board 300.

[0119] The surface of the second carrier surface 412 supports the arrangement of the light multiplexing assembly 450 and the converging lens 460.

[0120] The surface of the third carrier surface 413 supports the arrangement of the fiber adapter 470.

[0121] Exemplarily, the surface height of the second carrier surface 412 is higher than the surface height of the third carrier surface 413, so as to ensure that the optical paths of the respective optical elements arranged on the surface are matched in height.

[0122] FIG. 8 is a sectional structure diagram of a light receiving component according to some embodiments of the present disclosure; and FIG. 9 is a structure diagram of a light receiving component according to some embodiments of the present disclosure. As shown in FIGS. 8 and 9, in some embodiments, the light receiving component 500 is arranged on the surface of the circuit board 300.

[0123] The light receiving component 500 can include a first substrate 510.

[0124] Exemplarily, compared with other structures, the first substrate 510 has a smaller coefficient of thermal expansion, and thus the first substrate 510 is prone to the phenomenon of mismatching of the coefficients of thermal expansion between the first substrate 510 and other materials.

[0125] When the first substrate 510 is electrically connected with the circuit board 300, the coefficients of thermal expansion between the first substrate 510 and the circuit board 300 are mismatched, and exemplarily, the coefficient of thermal expansion of the circuit board 300 is greater than the coefficient of thermal expansion of the first substrate 510, which is prone to cause the first substrate 510 to be deformed and cracked. Therefore, an intermediate part 500a is arranged between the first substrate 510 and the circuit board 300. The intermediate part 500a has a smaller coefficient of thermal expansion, which can match the coefficients of thermal expansion between the first substrate 510 and the circuit board 300.

[0126] The circuit board 300 can be provided with a recess 302, the intermediate portion 500a is arranged on the surface of the recess 302, and then the first substrate 510 is arranged on the surface of the intermediate portion 500a.

[0127] For example, the circuit board 300 is provided with a light receiving chip, the first substrate 510 is provided with a first lens array and a light folding member, and the light path of the light signal output by the first lens array is turned at the light folding member to transmit the light signal to the surface of the light receiving chip.

[0128] The intermediate portion 500a is arranged on one side of the light receiving chip, and the arrangement of the intermediate portion 500a can raise the height of the first substrate 510, and then raise the distance between the light folding member and the light receiving chip. The arrangement of the recess 302 can offset the height raised by the intermediate portion 500a, and then lower the height of the first substrate 510, match the distance between the light folding member and the light receiving chip, and ensure that the light spot formed by the light signal output by the light folding member falls on the light receiving chip.

[0129] The light receiving component 500 can include a fiber adapter 520. The fiber adapter 520 is configured to fix the end of the optical fiber and couple the light signal.

[0130] The light receiving component 500 can include a collimating lens 530. The collimating lens 530 is arranged on the light path of the fiber adapter 520. The collimating lens 530 collimates the light signal output by the fiber adapter 520.

[0131] The light receiving component 500 can include a light splitter. The received light signal can be split into multiple light signals by the light splitter.

[0132] In some embodiments, the light splitter can be an optical demultiplexing component 540, which splits the light signal into multiple light signals, thereby realizing the reception of multiple light signals.

[0133] In some embodiments, the light splitter can be an arrayed waveguide grating (AWG). The received light signal is split into multiple light signals by the AWG, and then the light path is turned, thereby transmitting the multiple light signals to the surface of the light receiving chip.

[0134] In some embodiments, the light splitter can be a light splitting component, which includes an array of filter members and an array of reflection members. One filter member and a corresponding reflection member constitute a light splitting unit, and the light splitting component includes at least one light splitting unit.

[0135] In some examples, the array of filter members can be a first lens array.

[0136] In the same light splitting unit, the wavelength transmitted by the filter and the wavelength reflected by the filter are different, and the wavelength reflected by the filter and the wavelength reflected by the reflector are the same, so as to realize light splitting. When the light splitting assembly includes multiple light splitting units, in adjacent light splitting units, the reflector reflects the wavelength reflected by the filter in the same light splitting unit towards the filter in the next light splitting unit, so as to be reflected or transmitted by the filter in the next light splitting unit, so as to realize light splitting.

[0137] The light signals of different wavelengths are output by each light splitting unit, so as to realize light splitting of multiple light signals. The filter array and the reflector array are arranged in air, and the refractive index of air medium is stable relative to the refractive index of other media, so as to ensure the stability of the optical path and the optical coupling efficiency. The other media may be affected by stress to cause crystal transformation and affect the stability of the refractive index.

[0138] In some examples, the filters in the multiple light splitting units are constructed to form a first lens array.

[0139] FIG. 10 is a structure diagram of a light receiving component corresponding to a light splitting assembly according to some examples of the present disclosure; and FIG. 11 is a top view of the light receiving component corresponding to the light splitting assembly according to some examples of the present disclosure. As shown in FIGS. 10 and 11, in some examples, the light splitting assembly 590 is arranged between the light output path of the fiber adapter 520 and the light input path of the light turning member 560.

[0140] In some examples, the light splitting assembly 590 includes at least one light splitting unit. One filter and the corresponding reflector constitute a light splitting unit.

[0141] For example, when the light splitting assembly 590 includes one light splitting unit, two light signals can be received.

[0142] For example, when the light splitting assembly 590 includes three light splitting units, four light signals can be received.

[0143] For example, when the light splitting assembly 590 includes seven light splitting units, eight light signals can be received.

[0144] In some examples, in the same light splitting unit, the wavelength transmitted by the filter and the wavelength reflected by the filter are different, and the wavelength reflected by the filter and the wavelength reflected by the reflector are the same, so as to realize light splitting.

[0145] Exemplarily, in the same splitting unit, the filter piece can transmit the first wavelength optical signal and reflect the second wavelength optical signal, the reflector piece is arranged on the reflection light path of the second wavelength optical signal of the filter piece, and the reflector piece can reflect the second wavelength optical signal. When the splitting assembly includes one splitting unit, the reflector piece reflects the second wavelength optical signal towards the light folding piece; when the splitting assembly includes multiple splitting units, the reflector piece reflects the second wavelength optical signal towards the filter piece in the next splitting unit.

[0146] Since the filter piece can transmit the first wavelength optical signal, the first wavelength optical signal is transmitted into one light inlet of the light folding piece through the filter piece, so as to separate out the first wavelength optical signal.

[0147] The second wavelength optical signal reflected by the filter piece reaches the reflector piece, and the reflector piece transmits the second wavelength optical signal towards another light inlet of the light folding piece, so as to separate out the second wavelength optical signal.

[0148] Hereinafter, taking the splitting assembly 590 including three splitting units to realize four-way optical signal receiving as an example for exemplarily description.

[0149] In some embodiments, the splitting assembly 590 includes a first filter piece 591, a second filter piece 593, and a third filter piece 595.

[0150] Exemplarily, the first filter piece 591, the second filter piece 593, and the third filter piece 595 are in the same column and constitute a filter piece array. Each filter piece is combined together to constitute the filter piece array. Adjacent filter pieces have a certain gap.

[0151] In some embodiments, the splitting assembly 590 includes a first reflector piece 592, a second reflector piece 594, and a third reflector piece 596.

[0152] Exemplarily, the first reflector piece 592, the second reflector piece 594, and the third reflector piece 596 are in the same column and constitute a reflector piece array. Each reflector piece is combined together to constitute the reflector piece array. Adjacent reflector pieces have a certain gap.

[0153] In the disclosure, the first filter piece 591 and the first reflector piece 592 constitute a first splitting unit. Exemplarily, the first filter piece 591 is arranged opposite to the light outlet light path of the fiber adapter 520. In terms of bit sequence, the first splitting unit is the first splitting unit.

[0154] In the disclosure, the second filter piece 593 and the second reflector piece 594 constitute a second splitting unit.

[0155] In the disclosure, the third filter piece 595 and the third reflector piece 596 constitute a third splitting unit. In terms of bit sequence, the third splitting unit is the last splitting unit.

[0156] In some embodiments, the first filter 591 transmits the first wavelength light signal and reflects light signals containing the second wavelength light signal, the third wavelength light signal, and the fourth wavelength light signal.

[0157] In some embodiments, the second filter 593 transmits the second wavelength light signal and reflects light signals containing the third wavelength light signal and the fourth wavelength light signal, and the second reflector 594 reflects the light signals containing the third wavelength light signal and the fourth wavelength light signal.

[0158] In some embodiments, the third filter 595 transmits the third wavelength light signal and reflects the fourth wavelength light signal, and the third reflector 596 reflects the fourth wavelength light signal.

[0159] In some embodiments, the first filter 591 transmits the first wavelength light signal and reflects light signals containing the second wavelength light signal, the third wavelength light signal, and the fourth wavelength light signal.

[0160] In some embodiments, the first reflector 592 is located on the reflected light path of the first filter 591 to receive the light signals reflected by the first filter 591.

[0161] In some embodiments, the second filter 593 is located on the reflected light path of the first reflector 592 to receive the light signals reflected by the first reflector 592 and transmits the second wavelength light signal to couple the second wavelength light signal into the second light inlet of the light folding element. Meanwhile, the second filter 593 reflects light signals containing the third wavelength light signal and the fourth wavelength light signal.

[0162] In some embodiments, the second reflector 594 is located on the reflected light path of the second filter 593 to receive the light signals reflected by the second filter 593.

[0163] In some embodiments, the third filter 595 is located on the reflected light path of the second reflector 594 to receive the light signals reflected by the second reflector 594 and transmits the third wavelength light signal to couple the third wavelength light signal into the third light inlet of the light folding element. Meanwhile, the third filter 595 reflects the fourth wavelength light signal.

[0164] In some embodiments, the third reflector 596 is located on the reflected light path of the fourth wavelength light signal reflected by the third filter 595 to receive the fourth wavelength light signal reflected by the third filter 595 and transmits the fourth wavelength light signal to couple the fourth wavelength light signal into the fourth light inlet of the light folding element.

[0165] In some embodiments, the first reflecting member 592 is located on the reflected light path of the second wavelength optical signal of the first filter 591. In the orientation shown in FIG. 11, the first reflecting member 592 is located at the lower right of the first filter 591, and the area between the first filter 591 and the fiber adapter 520 is relatively empty.

[0166] In some embodiments, the collimating lens 530 is disposed on the area between the first filter 591 and the fiber adapter 520. Exemplarily, the collimating lens 530 is on the same array as the reflecting member array, thereby reducing the area of the first substrate 510 and facilitating the miniaturization of the light receiving component and adapting to the design of a small-sized light engine.

[0167] In some embodiments, the first filter 591, the second filter 593, and the third filter 595 can be in the form of filter pieces, respectively. The light-in and light-out of each of the first filter 591, the second filter 593, and the third filter 595 are displaced in height, and the light-in light path and the light-out light path are parallel to each other.

[0168] In some embodiments, the collimating lens 530 horizontally outputs light. “Horizontally” refers to the direction parallel to the surface of the first substrate 510. Then the light signal incident on the first filter 591 is horizontal light, and the light output by the first filter 591 is also horizontal light.

[0169] In the present disclosure, when the collimating lens 530 horizontally outputs light, in the same light splitting unit, the light-in surface of the filter and the light-in surface of the reflecting member are relatively parallel, so that the light signal output by the reflecting member is output in a direction parallel to the surface of the substrate, that is, the reflecting member horizontally outputs light.

[0170] In the present disclosure, when the collimating lens 530 horizontally outputs light, in adjacent light splitting units, the connecting line between the reflecting member in the previous light splitting unit and the filter in the next light splitting unit is parallel to the length direction of the substrate, so that the light signal output by each light splitting unit is transmitted to the surface of the light folding member in a direction parallel to the surface of the substrate, that is, each light splitting unit horizontally outputs light.

[0171] Exemplarily, the connecting line between the first reflecting member 592 and the second filter 593 is parallel to the length direction of the substrate, that is, the connecting line between the first reflecting member 592 and the second filter 593 is parallel to the connecting line between the collimating lens 530 and the first filter 591, so as to ensure that the first reflecting member 592 horizontally outputs light, and further ensure that the second filter 593 horizontally outputs light.

[0172] Exemplarily, the connecting line between the second reflecting member 594 and the third filtering member 595 is arranged parallel to the length direction of the substrate, that is, the connecting line between the second reflecting member 594 and the third filtering member 595 is parallel to the connecting line between the collimating lens 530 and the first filtering member 591, so as to ensure that the second reflecting member 594 emits light horizontally, and then the third filtering member 595 emits light horizontally.

[0173] Exemplarily, the light entrance surface of the third filtering member 595 is arranged parallel to the light entrance surface of the third reflecting member 596, so as to make the third reflecting member 596 emit light horizontally.

[0174] In the present disclosure, the vertical spacing between adjacent filtering members is the same, and the vertical spacing between adjacent reflecting members is the same, so as to make each light splitting unit emit light to the light folding member with the same light emitting spacing.

[0175] In the present disclosure, the placement position or angle between each filtering member and each reflecting member can be flexibly adjusted, so as to adapt to different types of optical module products, and has strong versatility.

[0176] FIG. 12 is a schematic side view of a light receiving component according to some embodiments of the present disclosure. As shown in FIG. 12, in some embodiments, the light splitting assembly decomposes the last light splitting unit corresponding to the last light signal. The light folding member and the reflecting member in the last light splitting unit can be provided with a light transmission part, which can transmit the last light signal, so as to couple the last light signal to the light entrance end of the light folding member.

[0177] Taking four-way light receiving as an example, the light splitting assembly 590 includes a first light splitting unit, a second light splitting unit, and a third light splitting unit, so as to realize four-way light signal receiving. Exemplarily, the third light splitting unit is a light splitting unit corresponding to the fourth wavelength light signal, and the third light splitting unit is the last light splitting unit.

[0178] The third reflecting member 596 reflects the fourth wavelength light signal, and the light emitting direction of the fourth wavelength light signal is towards the fourth light entrance port of the light folding member.

[0179] In some embodiments, the area between the third reflecting member 596 and the fourth light entrance port is relatively empty. In order to improve the light coupling efficiency, the light transmission part 597 can be arranged between the third reflecting member 596 and the fourth light entrance port.

[0180] The light transmission part 597 can make the fourth wavelength light signal transmit, so as to be coupled to the fourth light entrance port of the light folding member.

[0181] The arrangement of the light transmission part 597 can increase the light coupling efficiency of the fourth wavelength light signal, so as to increase the light receiving sensitivity of the fourth wavelength light signal.

[0182] FIG. 13 is a second side view of a light receiving component of a light splitting assembly according to some embodiments of the present disclosure, and FIG. 14 is a second top view of the light receiving component of the light splitting assembly according to some embodiments of the present disclosure. As shown in FIG. 13 and FIG. 14, the last light splitting unit of the light splitting assembly is configured to be a last light splitting unit, and no light transmission part is configured between the reflecting element and the light folding element in the last light splitting unit.

[0183] In some embodiments, when no light transmission part is configured between the reflecting element and the light folding element in the last light splitting unit, the vertical distance between the reflecting element in the last light splitting unit and the reflecting element in the adjacent light splitting unit is greater than the vertical distance between the adjacent filter elements, so that the light splitting units emit light towards the light folding element with the same light emitting interval.

[0184] Taking four-way light receiving as an example, the light splitting assembly 590 includes a first light splitting unit, a second light splitting unit, and a third light splitting unit to achieve four-way light signal receiving. Exemplarily, the third light splitting unit is configured to split the fourth wavelength light signal, and the third light splitting unit is the last light splitting unit.

[0185] The third reflecting element 596 reflects the fourth wavelength light signal in a direction towards the fourth light inlet of the light folding element.

[0186] In some embodiments, no light transmission part is configured between the third reflecting element 596 and the fourth light inlet, and the area between the third reflecting element 596 and the fourth light inlet is relatively empty.

[0187] In the present disclosure, the light splitting units emit light towards the light folding element 560 with the same light emitting interval.

[0188] In some embodiments, a light transmission part 597 can be configured between the third reflecting element 596 and the fourth light inlet. At this time, the vertical distance between the adjacent filter elements is the same, the vertical distance between the adjacent reflecting elements is the same, and the vertical distance between the adjacent filter elements and the vertical distance between the adjacent reflecting elements remain the same, so that the light splitting units emit light towards the light folding element 560 with the same light emitting interval.

[0189] The first filter element 591, the second filter element 593, and the third filter element 595 have the characteristic that when light signals of different wavelengths are horizontally incident on the corresponding filter elements, the light emitting direction of the filter element is the same as the light incident direction, and the light emitting path of the filter element is displaced downward in height compared to the light incident path.

[0190] Exemplarily, the first filter element 591, the second filter element 593, and the third filter element 595 are configured as filter sheets. The filter sheets have the above-mentioned characteristic.

[0191] The first filter 591, the second filter 593 and the third filter 595 affect the displacement of the light emitting path generated by the light emitting path.

[0192] Exemplarily, the same type of filter is selected for each filter, and the displacement between the light emitting path and the light entering path of each filter is the same, so as not to affect the light emitting with the same light emitting interval between the light splitting units.

[0193] Exemplarily, the light transmitting part 597 can be arranged between the third reflecting part 596 and the fourth light entering port, and the light transmitting part 597 has the characteristics of the filter described above. The light transmitting part 597 can act as the filter described above. The arrangement of the light transmitting part 597 can also cause the light emitting path of the fourth wavelength optical signal to be displaced in height, and the displacement generated is the same as the displacement of the light emitting path generated by the first filter 591, the second filter 593 and the third filter 595. In this way, the light emitting with the same light emitting interval between different wavelength optical signals is ensured.

[0194] Exemplarily, the vertical distance between the light transmitting part 597 and the third filter 595, the vertical distance between the third filter 595 and the second filter 593, and the vertical distance between the second filter 593 and the first filter 591 are equal. It can be seen that the arrangement of the light transmitting part 597 can compensate for the displacement of the light emitting path of the fourth wavelength optical signal caused by the filter, so as to ensure that the fourth wavelength optical signal and other wavelength optical signals are emitted with the same light emitting interval.

[0195] Exemplarily, the vertical distance between the third reflecting part 596 and the second reflecting part 594, the vertical distance between the second reflecting part 594 and the first reflecting part 592, and the vertical distance between the first reflecting part 592 and the collimating lens 530 are the same, so as to ensure that different wavelength optical signals are emitted with the same light emitting interval.

[0196] Exemplarily, the vertical distance between the light transmitting part 597 and the third filter 595 is the same as the vertical distance between the third reflecting part 596 and the second reflecting part 594, so as to ensure that different wavelength optical signals are emitted with the same light emitting interval.

[0197] In some embodiments, no light transmitting part is arranged between the third reflecting part 596 and the fourth light entering port. At this time, the displacement of the light emitting path of the fourth wavelength optical signal caused by the filter cannot be compensated by the light transmitting part, and the light emitting with the same light emitting interval between the fourth wavelength optical signal and other wavelength optical signals cannot be ensured.

[0198] Exemplarily, taking the orientation shown in FIG. 13 as an example, in order to ensure that the fourth-wavelength light signal and the other wavelength light signals are emitted with the same emission interval, the third reflective member 596 can be moved to the right and down relative to the second reflective member 594, at this time, the vertical interval between the third reflective member 596 and the second reflective member 594 is greater than the vertical interval between the second reflective member 594 and the first reflective member 592, so as to compensate for the emission interval of the fourth-wavelength light signal, and ensure that the fourth-wavelength light signal and the other wavelength light signals are emitted with the same emission interval.

[0199] Exemplarily, the vertical interval between the third reflective member 596 and the second reflective member 594 is greater than the vertical interval between the second reflective member 594 and the first reflective member 592, and the vertical interval between the second reflective member 594 and the first reflective member 592 is equal to the vertical interval between the third filter member 595 and the second filter member 593, so the vertical interval between the third reflective member 596 and the second reflective member 594 is greater than the vertical interval between the third filter member 595 and the second filter member 593.

[0200] By adjusting the position of the third reflective member 596, the emission interval of the fourth-wavelength light signal is compensated for, and the fourth-wavelength light signal and the other wavelength light signals are ensured to be emitted with the same emission interval.

[0201] Exemplarily, when the third reflective member 596 and the fourth light inlet are not provided with the light transmission part, the vertical interval between the third reflective member 596 and the second reflective member 594 is set to the first vertical interval; when the third reflective member 596 and the fourth light inlet are provided with the light transmission part 597, the vertical interval between the third reflective member 596 and the second reflective member 594 is set to the second vertical interval. The first vertical interval is greater than the second vertical interval, so as to compensate for the emission interval of the fourth-wavelength light signal, and ensure that the wavelength light signals are emitted with the same emission interval.

[0202] It can be understood that when the third reflective member 596 and the fourth light inlet are not provided with the light transmission part, the position of the third reflective member 596 moves more to the right and down of the second reflective member 594 than when the third reflective member 596 and the fourth light inlet are provided with the light transmission part 597.

[0203] FIG. 15 is a structural diagram of a light folding member according to some embodiments of the present disclosure. As shown in FIG. 15, in some embodiments, the light folding member 560 is provided with a plurality of converging surfaces 550a1 formed on the light inlet end surface respectively, for converging the received light signals.

[0204] In some embodiments, the converging surface 550a1 can be a converging lens surface.

[0205] The light-incident end surface of the light folding member 560 is respectively provided with each converging surface 550a1, so that it is not necessary to separately provide a converging lens array on the surface of the first substrate 510, thereby reducing the size of the first substrate 510, realizing the miniaturization of the light receiving component, and adapting to the design of a small-size light engine.

[0206] In some embodiments, taking four-way light signal reception as an example, the light-incident end surface of the light folding member 560 is respectively provided with four converging surfaces 550a1, and the four-way light signal output by the light splitting assembly 590 is coupled into the four converging surfaces 550a1.

[0207] In some embodiments, the converging surface 550a1 is hidden inside the light folding member 560, that is, the end surface of the light folding member 560 is convex relative to the converging surface 550a1, thereby effectively avoiding the problem of process pollution of the converging surface 550a1.

[0208] In some examples, the converging surface 550a1 can include at least a third converging surface and a fourth converging surface.

[0209] In some examples, the converging surface 550a1 can include a third converging surface, a fourth converging surface, a fifth converging surface, and a sixth converging surface.

[0210] FIG. 16 is a schematic diagram of the relative position relationship between the filter and the reflector in a light splitting assembly according to some embodiments of the present disclosure. As shown in FIG. 16, in some embodiments, the light splitting assembly 590 includes a filter array and a reflector array.

[0211] Taking four-way light signal reception as an example, the light splitting assembly 590 includes a first filter 591, a second filter 593, and a third filter 595.

[0212] Taking four-way light signal reception as an example, the light splitting assembly 590 includes a first reflector 592, a second reflector 594, and a third reflector 596.

[0213] The first filter 591 and the first reflector 592 constitute a first light splitting unit, the second filter 593 and the second reflector 594 constitute a second light splitting unit, and the third filter 595 and the third reflector 596 constitute a third light splitting unit.

[0214] In some embodiments, the filter and the reflector have a certain relative position relationship, so that each light splitting reaches the surface of the corresponding light receiving chip.

[0215] In some embodiments, by adjusting the filter-filter spacing, the reflector-reflector spacing, the filter-reflector spacing, and the inclination angle, the light signal transmission path spacing adjustment and the wave splitting function can be realized.

[0216] In some embodiments, the first filter 591, the second filter 593, and the third filter 595 have an inclination angle A relative to the surface of the first substrate 510, the first filter 591 has an angle B between the incident light and the exiting light, and the first filter 591 has an angle C between the exiting light and the light entrance surface of the first filter 591. According to the geometric relationship, the angle C is equal to the angle A, and the angle B is equal to π-2A.

[0217] The first filter 591 and the second filter 593 have a horizontal distance L, and the first filter 591 and the second filter 593 have a vertical distance H. The distance H can be obtained according to the placement distance between the light receiving chips, that is, the distance H is a known quantity.

[0218] According to the geometric relationship, tanB=H / L, that is, tan(π-2A)=H / L. Therefore, when the angle A and the distance L satisfy tan(π-2A)=H / L, the light can reach the corresponding light receiving chip surface.

[0219] In the present disclosure, the placement position and angle of each filter and reflector in the light splitting assembly can be adjusted to be applicable to various types of products, and the universality is strong.

[0220] In the present disclosure, by adjusting the placement position and angle of each filter and reflector, the coupling efficiency of the product is improved, the product performance and optical path tolerance are improved, and the stability of the product performance is increased.

[0221] FIG. 17 is a light path diagram of a light receiving component according to some embodiments of the present disclosure. As shown in FIG. 17, in some embodiments, the light splitting assembly 590 is arranged between the fiber adapter 520 and the light folding member 560.

[0222] In some embodiments, the light splitting assembly 590 includes the first filter 591, the second filter 593, and the third filter 595.

[0223] In some embodiments, the light splitting assembly 590 includes the first filter 591, the second filter 593, and the third filter 595.

[0224] In some embodiments, the third reflector 596 and the light folding member 560 are provided with a light transmission part 597.

[0225] In some embodiments, the light signal output by the fiber adapter 520 includes a first wavelength light signal, a second wavelength light signal, a third wavelength light signal, and a fourth wavelength light signal, and the reception of four light signals is realized.

[0226] The light splitting assembly 590 is configured to split the first wavelength light signal, the second wavelength light signal, the third wavelength light signal and the fourth wavelength light signal respectively, so that each light signal reaches the surface of the light receiving chip.

[0227] The light signal output by the fiber adapter 520 is transmitted along the collimating lens 530 to the surface of the first filter 591, wherein the first wavelength light signal is transmitted through the first filter 591, so that the first wavelength light signal is split, and the first wavelength light signal is coupled to the third converging surface of the light folding member.

[0228] The second wavelength light signal, the third wavelength light signal and the fourth wavelength light signal are reflected together by the first filter 591 to the surface of the first reflector 592, the first reflector 592 reflects the second wavelength light signal, the third wavelength light signal and the fourth wavelength light signal together towards the second filter 593, and then the second wavelength light signal, the third wavelength light signal and the fourth wavelength light signal reach the surface of the second filter 593. Among them, only the second wavelength light signal is transmitted through the second filter 593, so that the second wavelength light signal is split, and the second wavelength light signal is coupled to the fourth converging surface of the light folding member.

[0229] The third wavelength light signal and the fourth wavelength light signal are reflected together by the second filter 593 to the surface of the second reflector 594, the second reflector 594 reflects the third wavelength light signal and the fourth wavelength light signal together towards the third filter 595, and then the third wavelength light signal and the fourth wavelength light signal reach the surface of the third filter 595. Among them, only the third wavelength light signal is transmitted through the third filter 593, so that the third wavelength light signal is split, and the third wavelength light signal is coupled to the fifth converging surface of the light folding member.

[0230] The fourth wavelength light signal is reflected to the surface of the third reflector 596, the third reflector 596 reflects the fourth wavelength light signal towards the light transmission part 597, and the fourth wavelength light signal transmits through the light transmission part 597 to the sixth converging surface of the light folding member. Thus, the splitting of the four light signals is completed.

[0231] FIG. 18 is a light path diagram of a light receiving component according to some embodiments of the present disclosure. As shown in FIG. 18, in some embodiments, a light splitting assembly 590 is arranged between the fiber adapter 520 and the light folding member 560.

[0232] In some embodiments, the light splitting assembly 590 includes a first filter 591, a second filter 593 and a third filter 595.

[0233] In some embodiments, the light splitting assembly 590 includes a first reflector 592, a second reflector 594 and a third reflector 596.

[0234] In some embodiments, the third reflecting member 596 and the light folding member 560 are relatively blank, and no light transmission part is arranged between the third reflecting member 596 and the light folding member 560.

[0235] The light splitting principle shown in FIG. 18 is the same as that shown in FIG. 17, and will not be described again. The difference between the light path shown in FIG. 18 and the light path shown in FIG. 17 is that, since no light transmission part is arranged between the third reflecting member 596 and the light folding member 560 in FIG. 17, the third reflecting member 596 directly reflects the fourth wavelength light signal toward the sixth converging surface of the light folding member, and the fourth wavelength light signal is directly coupled to the sixth converging surface of the light folding member.

[0236] The following embodiments are exemplarily described by taking the optical splitter as the optical demultiplexing component 540.

[0237] The light receiving component 500 can include a lens group 550. The lens group 550 is arranged on the light exit path of the optical demultiplexing component 540. In some examples, the lens group 550 can also be referred to as a first lens array.

[0238] The lens group 550 includes respective lenses corresponding to respective light exit channels of the optical demultiplexing component 540. For example, in a four-way receiving case, the lens group 550 includes four lenses, i.e., a first lens 551, a second lens 552, a third lens 553, and a fourth lens 554.

[0239] The light exit path of the lens group 550 is parallel to the surface of the circuit board 300.

[0240] The light receiving component 500 can include a light receiving chip group. The light receiving chip group includes respective light receiving chips 570.

[0241] The number of light exit channels of the optical demultiplexing component 540, the number of lenses in the lens group 550, and the number of light receiving chips 570 in the light receiving chip group correspond to each other, respectively.

[0242] The light receiving direction of the light receiving chip is perpendicular to the surface of the circuit board 300.

[0243] Exemplarily, the light receiving chip 570 can be a front-illuminated light receiving chip. The front-illuminated light receiving chip refers to that the light-sensitive surface of the light receiving chip 570 faces upward, i.e., the light-sensitive surface is located on the top surface of the light receiving chip. The light-sensitive surface is a functional surface for receiving light signals.

[0244] Exemplarily, the light receiving chip 570 can be a back-illuminated light receiving chip. The back-illuminated light receiving chip refers to that the light-sensitive surface of the light receiving chip 570 faces downward, i.e., the light-sensitive surface is located on the bottom surface of the light receiving chip.

[0245] When the light-receiving chip 570 is a front-illuminated light-receiving chip, the surface on which the light-sensitive surface is located is the top surface of the chip. The surface on which the light-sensitive surface is located has a connection pad. The light-sensitive surface and the connection pad are usually located on the same surface of the light-receiving chip 570.

[0246] The connection pad on the top surface can be connected to the surface of the circuit board 300 by wire bonding, thereby realizing the electrical connection between the light-receiving chip 570 and the circuit board 300.

[0247] When the light-sensitive surface of the light-receiving chip is upward, the light-sensitive surface is exposed to the air. In order to reduce the reflection of the light signal by the light-sensitive surface and to allow more light signals to be absorbed into the light-sensitive surface, the surface of the light-sensitive surface is coated with an anti-reflection film having a refractive index greater than that of air, so that more light signals are transmitted into the light-sensitive surface, thereby ensuring the light-receiving power.

[0248] When the light-receiving chip 570 is a back-illuminated light-receiving chip, the surface on which the light-sensitive surface is located is the bottom surface of the chip, thereby avoiding the exposure of the light-sensitive surface to the air. At this time, the connection pad is arranged on the bottom surface of the chip, i.e., the light-receiving chip 570 is inverted on the surface of the circuit board 300.

[0249] The connection pad on the bottom surface of the light-receiving chip 570 can be connected to the surface of the circuit board 300 by solder balls, thereby realizing the electrical connection between the light-receiving chip 570 and the circuit board 300.

[0250] In order to transmit the light signal to the light-sensitive surface, the top surface of the light-receiving chip is provided with a spherical lens to allow the light signal to pass through and enter the light-receiving chip 570.

[0251] Exemplarily, a light-transmitting hole can be formed between the spherical lens and the light-sensitive surface, so that the light signal sequentially passes through the spherical lens and the light-transmitting hole to reach the light-sensitive surface, thereby realizing the reception of the light signal.

[0252] The light-receiving component 500 can include a light-refracting piece 560. The light-refracting piece 560 has a light path turning function.

[0253] The light-receiving direction of the light-receiving chip 570 is perpendicular to the surface of the circuit board 300, and the light-emitting direction of the lens group 550 is parallel to the surface of the circuit board 300. Therefore, the light-refracting piece 560 is arranged between the light-emitting light path of the lens group 550 and the light-receiving light path of the light-receiving chip 570.

[0254] The light-refracting piece 560 can turn the light signal output by the lens group 550, which is parallel to the surface of the circuit board 300, into a light signal perpendicular to the surface of the circuit board 300, thereby realizing the turning of the light path.

[0255] In the present disclosure, the light-receiving chip 570 is realized in the form of an array of patches, which will produce a certain patch tolerance.

[0256] In the present disclosure, there is a gap between each lens in the lens group 550, so that each lens is independently arranged. Compared with the case that each lens in the lens array forms an integral whole, the first lens 551, the second lens 552, the third lens 553 and the fourth lens 554 in the lens group 550 of the present disclosure are respectively arranged as an independent body.

[0257] Since each lens in the lens group 550 is independently arranged, each lens can be individually coupled.

[0258] When each lens is individually coupled, that is, the coupling is for a single lens, this coupling mode is called single lens coupling. Single lens coupling can couple the single lens to the focal length position of the corresponding light receiving chip, thereby improving the coupling precision of each lens, effectively absorbing the tolerance of the light receiving chip patch, increasing the optical tolerance, and improving the optical coupling efficiency.

[0259] In the embodiment of the present disclosure, the collimated light output by the demultiplexing assembly 540 is coupled to the focal length of the corresponding light receiving chip. For example, the light response current generated by each light receiving chip can be monitored, and then the setting angle of the demultiplexing assembly 540 is adjusted, so that the collimated light output by the demultiplexing assembly 540 is coupled to the optimal position, thereby improving the coupling precision of the demultiplexing assembly 540, and also absorbing the tolerance of the light receiving chip patch, increasing the optical tolerance, and improving the optical coupling efficiency and optical stability.

[0260] The first lens 551, the second lens 552, the third lens 553 and the fourth lens 554 are independently arranged. Each lens is fixed to the surface of the first substrate 510 by an adhesive. For example, the adhesive can be glue, and each lens is fixed to the surface of the first substrate 510 by the viscosity of the glue. For example, the adhesive can also be solder, which has a certain fluidity when soldering.

[0261] In some embodiments, the gap between adjacent lenses is small. For example, the gap between adjacent lenses can be only 150 μm. The possible reasons for reducing the gap between adjacent lenses include: in order to ensure a sufficient clear aperture, the width of each lens is large, so that in a limited space, the gap between adjacent lenses is small.

[0262] When the gap between adjacent lenses is small, the adhesive such as glue used to fix the adjacent lenses is easy to connect together, resulting in a phenomenon of continuous glue, which causes the position of the lens to deviate and reduces the optical coupling efficiency.

[0263] FIG. 19 is a structural diagram of a substrate according to some embodiments of the present disclosure. As shown in FIG. 19, in some embodiments, the first substrate 510 is a special-shaped substrate. The surface of the first substrate 510 is formed with a groove 511.

[0264] Based on the groove 511 on the surface of the first substrate 510, the groove 511 is arranged between adjacent lenses.

[0265] The groove 511 is arranged between the first lens 551 and the second lens 552, and separates the two.

[0266] The groove 511 is arranged between the second lens 552 and the third lens 553, and separates the two.

[0267] The groove 511 is arranged between the third lens 553 and the fourth lens 554, and separates the two.

[0268] The groove 511 is arranged between adjacent lenses, so that the adhesive such as glue overflowing around the fixed lens can be collected and stored in the groove 511, thereby avoiding the glue for fixing adjacent lenses from being connected together, i.e., avoiding the phenomenon of continuous glue.

[0269] In the present disclosure, the first substrate 510 is a special-shaped substrate. The groove 511 is formed on the surface of the first substrate 510. The special-shaped substrate design can effectively reduce the problem of lens continuous glue, and improve the manufacturability and disassembly of the product.

[0270] In the present disclosure, the first substrate 510 is a special-shaped substrate. The groove 511 is formed on the surface of the first substrate 510. The groove 511 can increase the bonding area of the optical element arranged on the surface of the first substrate 510, thereby effectively increasing the bonding strength and improving the optical performance stability.

[0271] In the present disclosure, the groove 511 arranged on the surface of the first substrate 510 can be used as a patch reference to improve the mounting precision of each optical element supported on the surface of the first substrate 510, thereby improving the optical tolerance and coupling efficiency.

[0272] Exemplarily, the groove 511 can be arranged on the surface of the first substrate 510 at a certain interval.

[0273] Exemplarily, the groove 511 can be a V-shaped groove, or a U-shaped groove or other grooves that can collect. The V-shaped groove, or the U-shaped groove or other grooves can be formed by etching on the surface of the first substrate 510.

[0274] The arrangement of the groove 511 can effectively reduce the problem of lens continuous glue, and can also increase the bonding strength of the optical element on the surface of the first substrate 510. In addition, the groove 511 can be used as a patch reference to improve the patch precision.

[0275] FIG. 20 is a schematic diagram of a substrate surface provided with lenses according to some embodiments of the present disclosure. As shown in FIG. 20, in some embodiments, the first lens 551, the second lens 552, the third lens 553, and the fourth lens 554 are independently arranged, and there is a gap between adjacent lenses.

[0276] Each lens is fixed to the surface of the first substrate 510 by an adhesive portion 580. Exemplarily, the adhesive portion can be glue.

[0277] The recess 511 can effectively avoid the adjacent adhesive portions 580 from being connected together, thereby avoiding the lens position from being deviated, ensuring the stability of the optical performance, and improving the optical coupling efficiency.

[0278] In some embodiments, the light folding member 560 has a light path folding function, and adjusts the light signal transmission path output by the optical demultiplexing component 540 from parallel to the surface of the circuit board 300 to perpendicular to the surface of the circuit board 300, thereby realizing the folding of the light path.

[0279] The light folding member 560 folds the light path to the light receiving direction of the light receiving chip 570, thereby transmitting the light signal to the surface of the light receiving chip 570, and realizing the reception of the light signal.

[0280] In some embodiments, the light folding member 560 can include a slope. The slope is directed towards the lens group 550 to reflect the light signal output by each lens in the lens group 550 towards the light receiving chip 570, thereby folding the light path to the light receiving direction of the light receiving chip 570.

[0281] In some embodiments, the included angle between the slope in the light folding member 560 and the surface of the light receiving chip can be 45°. When the light output surface of the light folding member 560 is a horizontal surface, the light signal output by the light folding member 560 can be vertically incident into the light sensitive surface of the light receiving chip or the light transmission hole of the spherical lens.

[0282] Exemplarily, when the light receiving chip is front-illuminated, the light signal output by the light folding member 560 is vertically incident into the light sensitive surface of the light receiving chip; when the light receiving chip is back-illuminated, the light signal output by the light folding member 560 is vertically incident into the light transmission hole of the light receiving chip.

[0283] When the light is incident into the light sensitive surface or the spherical lens, a part of the light will be reflected by the light sensitive surface or the spherical lens. Since the included angle between the reflection surface and the surface of the light receiving chip is 45°, the reflected part of the light returns along the original path, resulting in a large back loss and reducing the quality of the received light signal.

[0284] In some embodiments, the included angle between the inclined surface in the light folding member 560 and the surface of the light receiving chip can be 42°. When the light output surface of the light folding member 560 is a horizontal plane, the light signal output by the light folding member 560 can be obliquely incident into the light sensitive surface of the light receiving chip or the light passing hole of the spherical lens.

[0285] With the increase of the rate of the optical module, the light sensitive surface of the light receiving chip or the light passing hole of the spherical lens is reduced, and the size of the light sensitive surface or the light passing hole is limited. When the light signal is obliquely incident into the light sensitive surface or the light passing hole on the top surface of the light receiving chip, a part of the light is blocked and cannot pass through the light sensitive surface or the light passing hole, thereby reducing the light coupling efficiency.

[0286] Since the light is obliquely incident into the light sensitive surface or the light passing hole, the light reflected by the light sensitive surface or the spherical lens is obliquely emitted into the air, thereby not causing back loss and having less impact on the quality of the optical signal.

[0287] In the present disclosure, the light folding member can include at least two inclined surfaces. Each inclined surface exhibits different optical characteristics to the light signal. For example, one inclined surface exhibits reflection characteristics to the light signal to turn the light path towards the direction of the light receiving chip; another inclined surface exhibits refraction characteristics to the light signal to further adjust the light path, thereby adjusting the light path to be perpendicular to the surface of the light receiving chip to adapt to the limited light sensitive surface area or the light passing hole diameter of the spherical lens, and strive for more light signal coupling into the light sensitive surface or the light passing hole.

[0288] In some embodiments, the light folding member can include two inclined surfaces.

[0289] One inclined surface is obliquely arranged relative to the surface of the light receiving chip. The one inclined surface is configured to turn the light signal transmission path towards the light receiving chip. The light signal output by the one inclined surface is transmitted in a direction that is not perpendicular to the interface reached by the light signal.

[0290] Another inclined surface is arranged towards the previous inclined surface, and the inclined surface is obliquely arranged relative to the surface of the light receiving chip and located on the output light path of the previous inclined surface. The inclined surface is configured to adjust the light signal transmission path so that the light signal is perpendicularly incident into the inner surface of the light receiving chip.

[0291] Under the cooperation of the two inclined surfaces, the light signal finally output by the light folding member is perpendicularly incident into the light sensitive surface of the light receiving chip 570 or the light passing hole, thereby avoiding the light blocking phenomenon and ensuring the light coupling efficiency. Meanwhile, a part of the light reflected by the light sensitive surface or the spherical lens is reflected by the inclined surface into the air, thereby reducing the back loss and the impact on the quality of the received optical signal.

[0292] FIG. 21 is a structural diagram of a light receiving component according to some embodiments of the present disclosure. The structure of the light folding piece 560a is shown in FIG. 21. As shown in FIG. 13, in some embodiments, two inclined surfaces are included in the light folding piece 560a, which are a first inclined surface 564a and a second inclined surface 565a.

[0293] The second inclined surface 565a is the interface reached by the light signal output by the first inclined surface 564a.

[0294] The second inclined surface 565a is the light output surface of the light folding piece 560a.

[0295] FIG. 22 is a structural diagram of another light receiving component according to some embodiments of the present disclosure. The structure of the light folding piece 560b is shown in FIG. 22. As shown in FIG. 14, in some embodiments, two inclined surfaces are included in the light folding piece 560b, which are a first inclined surface 562b and a second inclined surface 563b.

[0296] The second inclined surface 563b is the interface reached by the light signal output by the first inclined surface 562b.

[0297] FIG. 23 is a structural diagram of yet another light receiving component according to some embodiments of the present disclosure. The structure of the light folding piece 560c is shown in FIG. 23. As shown in FIG. 15, in some embodiments, two inclined surfaces are included in the light folding piece 560c, which are a first inclined surface 562c and a second inclined surface 564c.

[0298] A first connecting surface 563c is provided between the first inclined surface 562c and the second inclined surface 564c, and a second connecting surface 565c is provided between the second inclined surface 564c and the light input surface 561c.

[0299] The first connecting surface 563c is the interface reached by the light signal output by the first inclined surface 562c.

[0300] The second connecting surface 565c is the light output surface of the light folding piece 560c.

[0301] FIG. 24 is a structural diagram of a light folding piece according to some embodiments of the present disclosure. As shown in FIG. 24, in some embodiments, a light folding piece 560a is provided.

[0302] The light folding piece 560a can include a top surface 561a.

[0303] The light folding piece 560a can include a bottom surface 562a. The bottom surface 562a and the top surface 561a are located on opposite surfaces. The bottom surface 562a is fixed to the surface of the first substrate 510, thereby fixing the light folding piece 560a to the surface of the first substrate 510.

[0304] The light folding member 560a can include a light receiving surface 563a. The light receiving surface 563a is disposed between the top surface 561a and the bottom surface 562a. The light receiving surface 563a is disposed towards the lens group 550 to receive the light signal output by the lens group 550.

[0305] The light folding member 560a can include a first inclined surface 564a. The first inclined surface 564a is disposed towards the light receiving surface 563a to receive the light signal output by the light receiving surface. The first inclined surface 564a exhibits a reflecting characteristic to the light signal transmitted by the light receiving surface 563a.

[0306] In some embodiments, the first inclined surface 564a is disposed obliquely relative to the surface of the light receiving chip 570.

[0307] The first inclined surface 564a is configured to reflect the light signal output by the lens group 550 towards the direction where the light receiving chip is located. By reflecting the light signal, the optical path is adjusted from being parallel to the surface of the circuit board 300 to being inclined to be perpendicular to the surface of the circuit board 300, so as to turn the light signal towards the light receiving chip.

[0308] The light folding member 560a can include a second inclined surface 565a. The second inclined surface 565a is disposed below the first inclined surface 564a to receive the light signal output by the first inclined surface 564a, and the second inclined surface 565a is the interface reached by the light signal output by the first inclined surface 564a.

[0309] The second inclined surface 565a is configured as the light output surface of the light folding member 560a, and the light signal finally output by the light folding member 560a is emitted along the surface of the second inclined surface 565a.

[0310] In some embodiments, the second inclined surface 565a is disposed obliquely relative to the surface of the light receiving chip 570.

[0311] When the light signal output by the first inclined surface 564a is incident on the second inclined surface 565a in a direction that is not perpendicular to the second inclined surface 565a, the light signal output by the second inclined surface 565a is expected to be incident perpendicularly on the surface of the light receiving chip.

[0312] It can be understood that when the light signal output by the first inclined surface 564a is incident perpendicularly on the second inclined surface 565a, the light signal output by the second inclined surface 565a cannot be incident perpendicularly on the surface of the light receiving chip, but is incident obliquely relative to the surface of the light receiving chip. At this time, the problem of blocking the light-sensitive surface of the front-illuminated light receiving chip or the light hole of the back-illuminated light receiving chip may occur, which reduces the optical coupling efficiency, but reduces the back loss and the impact on the quality of the light receiving signal. Therefore, if the problem of blocking light can be allowed, the light signal output by the second inclined surface 565a does not have to be incident perpendicularly on the surface of the light receiving chip.

[0313] The embodiments of the present disclosure aim to solve the problem of light blocking by the light-sensitive surface or the light transmission hole. Therefore, the design purpose of the present disclosure aims to make the light signal output by the second inclined surface 565a vertically incident on the surface of the light receiving chip, thereby adapting to the limited light-sensitive surface area or the light transmission aperture of the spherical lens, striving for more light signal coupling to the light-sensitive surface or within the light transmission aperture, thereby avoiding the light blocking phenomenon and improving the light coupling efficiency of the light incident on the surface of the light receiving chip.

[0314] In some embodiments, the first inclined surface 564a is configured to output the light signal in a direction that is not perpendicular to the second inclined surface 565a, which is referred to as: the light signal output by the first inclined surface 564a is not vertically incident on the second inclined surface 565a. The following similar description can be referred to for explanation.

[0315] The light signal output by the first inclined surface 564a is not vertically incident on the second inclined surface 565a, so the included angle between the incident light ray and the exit light ray of the first inclined surface 564a is not a right angle.

[0316] In some embodiments, the second inclined surface 565a is configured to adjust the light signal transmission path to make the light signal vertically incident on the surface of the light receiving chip.

[0317] In some embodiments, the angle between the first inclined surface 564a and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface 565a and the surface of the light receiving chip is a second angle B. When the first angle A and the second angle B satisfy a predetermined relationship, the light signal output by the second inclined surface 565a can be vertically incident on the surface of the light receiving chip.

[0318] In some embodiments, in order to realize that the light signal output by the second inclined surface 565a is vertically incident on the surface of the light receiving chip, the light signal output by the first inclined surface 564a is not vertically incident on the second inclined surface 563b, and at the same time, the first angle A should be an angle other than 45°, so that the light signal output by the first inclined surface 564a is transmitted to the second inclined surface 565a in a direction that is not perpendicular to the surface of the light receiving chip.

[0319] It can be understood that based on the law of refraction, when the light signal output by the first inclined surface 564a is not vertically incident on the second inclined surface 565a, and the light signal output by the second inclined surface 565a is vertically incident on the surface of the light receiving chip, the case where the light signal output by the first inclined surface 564a is transmitted to the second inclined surface 565a in a direction perpendicular to the surface of the light receiving chip is excluded, that is, the case where the first angle is 45° is excluded.

[0320] The light folding member 560a can include a connecting surface 566a. The connecting surface 566a is formed between the first inclined surface 564a and the second inclined surface 565a for the convenience of processing. The connecting surface 566a does not affect the light path. Of course, the first inclined surface 564a and the second inclined surface 565a can also be directly connected together.

[0321] For the light folding member 560a, the first inclined surface 564a is a functional surface for turning the light path, and the second inclined surface 565a is a functional surface for adjusting the light path.

[0322] For the light folding member 560a, the light signal is reflected once at the first inclined surface 564a and refracted once at the second inclined surface 565a. The light path is turned through reflection, and the turned light path is adjusted through refraction, so that the light signal finally output by the light folding member 560a is vertically incident to the surface of the light receiving chip, so as to adapt to the limited light sensitive surface area or the light passing aperture of the spherical lens.

[0323] For the light folding member 560a, since the position of the light receiving chip is fixed, the inclination posture of the first inclined surface 564a is fixed to turn the light path towards the direction of the position of the light receiving chip. The inclination posture of the second inclined surface 565a is arranged opposite to the inclination posture of the first inclined surface 564a. Exemplarily, the end surface of the second inclined surface 565a close to the first inclined surface 564a is higher than the end surface away from the first inclined surface 564a.

[0324] FIG. 25 is a structural diagram I of another light folding member according to some embodiments of the present disclosure, and FIG. 26 is a structural diagram II of another light folding member according to some embodiments of the present disclosure. As shown in FIGS. 25 and 26, in some embodiments, a light folding member 560b is provided.

[0325] In some embodiments, the light folding member 560b can include a light receiving surface 561b. The light receiving surface 561b is arranged towards the lens group 550 to receive the light signal output by the lens group 550.

[0326] Exemplarily, the light receiving surface 561b can be perpendicular to the surface of the light receiving chip. At this time, the light signal is incident to the light receiving surface 561b along the horizontal direction and transmits out of the light receiving surface 561b along the horizontal direction.

[0327] When the light receiving surface 561b is not perpendicular to the surface of the light receiving chip, the refractive index requirement of the light folding member 560b is higher.

[0328] Exemplarily, the light receiving surface 561b can be an inclined surface. At this time, the light signal is incident to the light receiving surface 561b along the horizontal direction, and refracts at the light receiving surface 561b to transmit out of the light receiving surface 561b along the inclined direction.

[0329] In some embodiments, the light-in surface 561b is an inclined surface to increase the stability of the light folding member 560b through the light-in surface 561b.

[0330] In some embodiments, the light folding member 560b can include a first inclined surface 562b. The first inclined surface 562b is disposed towards the light-in surface 561b to receive the light signal output by the light-in surface 561b.

[0331] In some embodiments, the first inclined surface 562b is disposed obliquely relative to the surface of the light receiving chip 570. The first inclined surface 562b exhibits a reflection characteristic to the light signal. The turning of the optical path is achieved through the reflection of the light signal: the optical path is adjusted from transmission parallel to the surface of the circuit board 300 to transmission oblique to the surface of the circuit board 300 to turn the light signal towards the light receiving chip.

[0332] In some embodiments, the light folding member 560b can include a second inclined surface 563b. The second inclined surface 563b is located below the first inclined surface 562b to receive the light signal output by the first inclined surface 562b, and the second inclined surface 563b is the interface reached by the light signal output by the first inclined surface 562b.

[0333] The second inclined surface 563b is configured as the light-out surface of the light folding member 560b, and the light signal finally output by the light folding member 560b is emitted along the surface of the second inclined surface 563b.

[0334] In some embodiments, the second inclined surface 563b is disposed obliquely relative to the surface of the light receiving chip 570.

[0335] When the light signal output by the first inclined surface 562b is incident on the second inclined surface 563b in a direction non-perpendicular to the second inclined surface 563b, the light signal output by the second inclined surface 563b is expected to be incident perpendicularly to the surface of the light receiving chip.

[0336] In the embodiments of the present disclosure, the problem of light being blocked by the light-sensitive surface or the light-through hole is solved, and therefore the design purpose of the present disclosure is to make the light signal output by the second inclined surface 563b be incident perpendicularly to the surface of the light receiving chip.

[0337] In some embodiments, the first inclined surface 562b is configured such that the light signal output by the first inclined surface 562b is incident on the second inclined surface 563b in a direction non-perpendicular to the second inclined surface 563b, which is referred to as: the light signal output by the first inclined surface 562b is non-perpendicularly incident on the second inclined surface 563b.

[0338] When the light signal output by the first inclined surface 562b is non-perpendicularly incident on the second inclined surface 563b, the included angle between the incident light ray and the emergent light ray of the first inclined surface 562b is non-right angle.

[0339] In some embodiments, the second inclined surface 563b is configured to adjust the optical signal transmission path so that the optical signal is perpendicularly incident on the surface of the light receiving chip.

[0340] In some embodiments, the angle between the first inclined surface 562b and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface 563b and the surface of the light receiving chip is a second angle B. When the first angle A and the second angle B satisfy a preset relationship, the optical signal output by the second inclined surface 563b can be perpendicularly incident on the surface of the light receiving chip, thereby solving the problem of light blocking and improving the optical coupling efficiency.

[0341] In some embodiments, in order to achieve that the optical signal output by the second inclined surface 563b is perpendicularly incident on the surface of the light receiving chip, the optical signal output by the first inclined surface 562b is non-perpendicularly incident on the second inclined surface 563b, and at the same time, the first angle A should be an angle other than 45°, so that the optical signal output by the first inclined surface 562b is transmitted to the second inclined surface 563b in a direction non-perpendicular to the surface of the light receiving chip.

[0342] It can be understood that, when the optical signal output by the first inclined surface 562b is non-perpendicularly incident on the second inclined surface 563b, and the optical signal output by the second inclined surface 563b is perpendicularly incident on the surface of the light receiving chip, the case where the optical signal output by the first inclined surface 562b is transmitted to the second inclined surface 563b in a direction perpendicular to the surface of the light receiving chip is excluded, that is, the case where the first angle is 45° is excluded.

[0343] In some embodiments, the light folding member 560b can include a bottom surface 564b. The bottom surface 564b is fixed to the surface of the first substrate 510, thereby fixing the light folding member 560b to the surface of the first substrate 510.

[0344] In some embodiments, the first inclined surface 562b and the second inclined surface 563b can be directly connected together, or a connecting surface can be formed therebetween.

[0345] For the light folding member 560b, the first inclined surface 564a is a functional surface for folding the optical path, and the second inclined surface 565a is a functional surface for adjusting the folded optical path.

[0346] For the light folding member 560b, the optical signal is reflected once at the first inclined surface 562b and refracted once at the second inclined surface 563b. The reflection folds the optical path, and the refraction adjusts the folded optical path, so that the optical signal output by the light folding member 560b is perpendicularly incident on the surface of the light receiving chip, thereby adapting to the limited photosensitive surface area or the light transmission aperture of the spherical lens.

[0347] For the light folding piece 560b, since the position of the light receiving chip is fixed, the inclination posture of the first inclined surface 562b is fixed to turn the light path toward the direction where the light receiving chip is located. The inclination posture of the second inclined surface 563b is arranged in the same direction as the inclination posture of the first inclined surface 562b. Here, the same direction is not strictly parallel, but inclined toward the same direction. Exemplarily, the end surface of the second inclined surface 563b close to the first inclined surface 562b is lower than the end surface away from the first inclined surface 562b.

[0348] FIG. 27 is a structural diagram of another light folding piece according to some embodiments of the present disclosure; and FIG. 28 is another structural diagram of another light folding piece according to some embodiments of the present disclosure. As shown in FIGS. 27 and 28, in some embodiments, a light folding piece 560c is provided.

[0349] In some embodiments, the light folding piece 560c can include a light receiving surface 561c. The light receiving surface 561c is arranged toward the lens group 550 to receive the light signal output by the lens group 550.

[0350] In some embodiments, the light folding piece 560c can include a first inclined surface 562c. The first inclined surface 562c is arranged toward the light receiving surface 561c to receive the light signal output by the light receiving surface 561c.

[0351] In some embodiments, the first inclined surface 562c is arranged to be inclined relative to the surface of the light receiving chip 570. The first inclined surface 562c is configured as a function surface for turning the light path. The first inclined surface 562c reflects the light signal output by the light receiving surface 561c, and the light signal output by the first inclined surface 562c is transmitted in a direction non-perpendicular to the interface reached by the light signal.

[0352] In some embodiments, the light folding piece 560c can include a first connecting surface 563c. The first connecting surface 563c is connected with the first inclined surface 562c to receive the light signal output by the first inclined surface 562c. It can be seen that the first connecting surface 563c is the interface reached by the light signal output by the first inclined surface 562c, and thus the light signal output by the first inclined surface 562c is incident on the first connecting surface 563c in a direction non-perpendicular to the first connecting surface 563c.

[0353] In some embodiments, the light signal output by the first inclined surface 562c is incident on the first connecting surface 563c in a direction non-perpendicular to the first connecting surface 563c, and thus the included angle between the incident light ray and the emergent light ray of the first inclined surface 562c is not a right angle.

[0354] Exemplarily, the first connecting surface 563c is arranged as a horizontal surface, and can also be arranged as an inclined surface. The following embodiments are exemplarily described with the first connecting surface 563c as a horizontal surface.

[0355] The light signal is refracted once at the first connecting surface 563c, and the refracted light signal is transmitted along a direction that is not perpendicular to the interface reached by the light signal output by the first connecting surface 563c.

[0356] In some embodiments, the light-refracting piece 560c can include a second inclined surface 564c. The second inclined surface 564c is configured as a functional surface for light path adjustment. The second inclined surface 564c is connected with the first connecting surface 563c. That is, the first connecting surface 563c is arranged between the first inclined surface 562c and the second inclined surface 564c, so as to connect the first inclined surface 562c and the second inclined surface 564c. The second inclined surface 564c receives the light signal output by the first connecting surface 563c, and thus the second inclined surface 564c is the interface reached by the light signal output by the first connecting surface 563c. Further, the light signal output by the first connecting surface 563c is transmitted along a direction that is not perpendicular to the second inclined surface 564c. The light signal reaching the second inclined surface 564c is refracted again at the second inclined surface 564c, and the refracted light signal is transmitted along a direction that is perpendicular to the interface reached by the light signal output by the second inclined surface 564c.

[0357] In some embodiments, the light-refracting piece 560c can include a second connecting surface 565c. The second connecting surface 565c is connected with the second inclined surface 564c. The second connecting surface 565c serves as a fixing surface to fix the light-refracting piece 560c to the surface of the first substrate 510, and also serves as an output surface from which the light signal is output to the surface of the light-receiving chip.

[0358] In some embodiments, the second connecting surface 565c is a horizontal surface. In some embodiments, the second connecting surface 565c can also be an inclined surface. The following embodiments are exemplarily described with the second connecting surface 565c as a horizontal surface.

[0359] In some embodiments, the second connecting surface 565c receives the light signal output by the second inclined surface 564c, and thus the second connecting surface 565c is the interface reached by the light signal output by the second inclined surface 564c. Further, the light signal output by the second inclined surface 564c is transmitted along a direction that is perpendicular to the second connecting surface 565c.

[0360] In some embodiments, when the second connecting surface 565c is a horizontal surface, if the light signal is to be perpendicularly incident on the surface of the light-receiving chip along the second connecting surface 565c, the light signal output by the second inclined surface 564c should be perpendicularly incident on the second connecting surface 565c. If the light signal output by the second inclined surface 564c is to be perpendicularly incident on the second connecting surface 565c, the light signal output by the first connecting surface 563c should be non-perpendicularly incident on the second inclined surface 564c. If the light signal output by the first connecting surface 563c is to be non-perpendicularly incident on the second inclined surface 564c, the light signal output by the first inclined surface 562c should be non-perpendicularly incident on the first connecting surface 563c.

[0361] In some embodiments, the light signal output by the first inclined surface 562c is transmitted in a direction non-perpendicular to the first connecting surface 563c, so as to be non-perpendicular incident on the first connecting surface 563c.

[0362] In some embodiments, the light signal output by the first connecting surface 563c is transmitted in a direction non-perpendicular to the second inclined surface 564c, so as to be non-perpendicular incident on the second inclined surface 564c.

[0363] In some embodiments, the light signal output by the second inclined surface 564c is transmitted in a direction perpendicular to the second connecting surface 565c, so as to be perpendicular incident on the second connecting surface 565c.

[0364] In some embodiments, the light signal output by the second connecting surface 565c is transmitted in a direction perpendicular to the surface of the light-receiving chip.

[0365] In the embodiments of the present disclosure, the light-refracting piece 560c is configured to: the light signal output by the first inclined surface 562c is non-perpendicular incident on the first connecting surface 563c, the light signal output by the first connecting surface 563c is non-perpendicular incident on the second inclined surface 564c, the light signal output by the second inclined surface 564c is perpendicular incident on the second connecting surface 565c, and the light signal output by the second connecting surface 565c is perpendicular incident on the surface of the light-receiving chip.

[0366] In the embodiments of the present disclosure, the angle between the first inclined surface 562c and the surface of the light-receiving chip is a first angle A, and the angle between the second inclined surface 564c and the surface of the light-receiving chip is a second angle B. When a preset relationship is met between the first angle A and the second angle B, the light signal finally output by the second connecting surface 565c can be perpendicular incident on the surface of the light-receiving chip, thereby solving the problem of light blocking and improving the light coupling efficiency.

[0367] For example, the first angle A is an angle other than 45°. The reason is explained with reference to the description of the first angle A being an angle other than 45° in the light-refracting piece 560a and the light-refracting piece 560b.

[0368] For the light-refracting piece 560c, the light signal is reflected once at the first inclined surface 562c to achieve light path turning. The light signal is refracted once at the first connecting surface 563c to achieve light path adjustment. The light signal is refracted again at the second inclined surface 564c to further adjust the light path, so that the light signal finally output by the light-refracting piece 560c is perpendicular incident on the surface of the light-receiving chip.

[0369] Compared with the light-refracting piece 560a and the light-refracting piece 560b, the light-refracting piece 560c has more times of light path adjustment, so that the light-refracting piece 560c can more easily couple out the light signal perpendicular incident on the light-receiving chip, and the light path adjustment accuracy and the coupling accuracy can be more accurate.

[0370] The bottom surface of the light folding piece 560c is more flat than the light folding pieces 560a and 560b, and thus is more stable when fixed on the surface of the first substrate 510.

[0371] The connecting surface between the first inclined surface 562c and the second inclined surface 564c in the light folding piece 560c, i.e., the first connecting surface 563c, is relatively horizontal, while the connecting surface between the two inclined surfaces in the light folding pieces 560a and 560b is relatively vertical.

[0372] For the light folding piece 560c, the position of the light receiving chip is fixed, and thus the inclination posture of the first inclined surface 562b is fixed to turn the light path toward the direction of the position of the light receiving chip. The inclination posture of the second inclined surface 563b is arranged in the same direction as the inclination posture of the first inclined surface 562b, i.e., the same inclination trend is adopted.

[0373] FIG. 29 is a schematic diagram of a light path corresponding to a light folding piece according to some embodiments of the present disclosure. FIG. 29 shows the principle of the light path of the light folding piece 560a.

[0374] As shown in FIG. 29, the optical signal is output from the lens group 550 and is incident on the first inclined surface 564a, and is reflected to the second inclined surface 565a through the first inclined surface 564a. The reflected optical signal is not vertically incident on the second inclined surface 565a.

[0375] After the optical signal is refracted through the second inclined surface 565a, it is vertically incident on the surface of the light receiving chip, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the incident light into the light receiving chip.

[0376] Part of the optical signal incident on the light receiving chip is transmitted into the interior, and part of the optical signal is reflected by the photosensitive surface or the spherical lens. The reflected optical signal is vertically returned to the second inclined surface 565a.

[0377] Part of the optical signal returned to the second inclined surface 565a is reflected into the air, thereby reducing the power of the optical signal returned along the original path, reducing the return loss, and thus reducing the influence on the quality of the optical receiving signal.

[0378] The included angle between the first inclined surface 564a and the surface of the light receiving chip is a first angle A, and the included angle between the second inclined surface 565a and the surface of the light receiving chip is a second angle B. When the first angle A and the second angle B satisfy a preset relationship, the optical signal finally output by the second inclined surface 565a can be vertically incident on the surface of the light receiving chip.

[0379] Exemplarily, the first angle A is an angle other than 45°, so that the optical signal output by the first inclined surface 564a is not vertically incident on the second inclined surface 565a.

[0380] For the light folding piece 560a, the first inclined surface 564a is a light path turning functional surface, which produces a large turning of the light path transmission direction. The second inclined surface 565a is a light path adjusting functional surface, which further adjusts the turned light path to: the light signal is able to be perpendicularly incident on the surface of the light receiving chip.

[0381] FIG. 30 is a schematic diagram of a light path corresponding to another light folding piece according to some embodiments of the present disclosure. FIG. 30 shows a schematic diagram of a light path principle of the light folding piece 560b.

[0382] As shown in FIG. 30, the light signal is output from the lens group 550 and is incident on the first inclined surface 562b, and is reflected to the second inclined surface 563b through the first inclined surface 562b. The reflected light signal is not perpendicular to the second inclined surface 563b.

[0383] After the light signal is refracted through the second inclined surface 563b, it is perpendicularly incident on the surface of the light receiving chip, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the light incident into the light receiving chip.

[0384] A part of the light signal incident on the light receiving chip is transmitted into the interior, and a part of the light signal is reflected by the photosensitive surface or the spherical lens. The reflected light signal is perpendicularly returned to the second inclined surface 563b.

[0385] A part of the light signal returned to the second inclined surface 563b is reflected into the air, thereby reducing the power of the light signal returned along the original path, reducing the return loss, and thereby reducing the influence on the quality of the light receiving signal.

[0386] The angle between the first inclined surface 562b and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface 563b and the surface of the light receiving chip is a second angle B. When the first angle A and the second angle B satisfy a preset relationship, the light signal finally output by the second inclined surface 563b can be perpendicularly incident on the surface of the light receiving chip.

[0387] For example, the first angle A is an angle other than 45°, so that the light signal output by the second inclined surface 563b is not perpendicularly incident on the second inclined surface 565a, and thus the light signal output by the second inclined surface 563b can be perpendicularly incident on the surface of the light receiving chip.

[0388] For the light folding piece 560b, the first inclined surface 562b is a light path turning functional surface, which produces a large turning of the light path transmission direction. The second inclined surface 563b is a light path adjusting functional surface, which further adjusts the turned light path to: the light signal is able to be perpendicularly incident on the surface of the light receiving chip.

[0389] The difference between the light folding piece 560a and the light folding piece 560b is that the first inclined surface 564a and the second inclined surface 565a in the light folding piece 560a are oppositely arranged, while the first inclined surface 562b and the second inclined surface 563b in the light folding piece 560b are oppositely arranged.

[0390] FIG. 31 is a schematic diagram of a light path corresponding to another light folding piece according to some embodiments of the present disclosure. FIG. 31 shows a schematic diagram of a light path principle of the light folding piece 560c.

[0391] As shown in FIG. 31, the optical signal is incident on the first inclined surface 562c, and then the optical signal output by the first inclined surface 562c is non-perpendicularly incident on the first connecting surface 563c, the optical signal output by the first connecting surface 563c is non-perpendicularly incident on the second inclined surface 564c, the optical signal output by the second inclined surface 564c is perpendicularly incident on the second connecting surface 565c, and then the optical signal finally output by the second connecting surface 565c is perpendicularly incident on the surface of the light receiving chip, so as to adapt to the limited light sensitive surface area or the light passing aperture of the spherical lens, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the incident light into the light receiving chip.

[0392] Part of the optical signal incident on the light receiving chip is transmitted into the interior, and part of the optical signal is reflected by the light sensitive surface or the spherical lens. The reflected optical signal is perpendicularly returned to the second inclined surface 564c.

[0393] Part of the optical signal returned to the second inclined surface 564c is reflected by the second inclined surface 564c, and this part of the optical signal is diffusely reflected inside the light folding piece 560c, thereby reducing the power of the optical signal returned along the original path and reducing the return loss; part of the optical signal is refracted along the original path and returned to the first connecting surface 563c.

[0394] The optical signal returned to the first connecting surface 563c is obliquely incident on the first connecting surface 563c, and then part of the optical signal is reflected by the first connecting surface 563c into the air, thereby further reducing the return loss and reducing the influence on the quality of the received optical signal.

[0395] The light folding piece 560c has a lower return loss rate and a smaller influence on the quality of the received optical signal compared with the light folding piece 560a and the light folding piece 560b.

[0396] FIG. 32 is a schematic diagram of a light path corresponding to a light receiving component according to some embodiments of the present disclosure. As shown in FIG. 32, the first substrate 510 has a supporting effect.

[0397] The external optical signal is received by the fiber adapter 520, and then the optical signal is collimated by the collimating lens 530 and enters the optical demultiplexing assembly 540 in the form of collimated light.

[0398] The collimated light is decomposed into multiple light signals by the optical demultiplexing component 540. The multiple light signals are incident on corresponding lenses in the lens group 550, respectively.

[0399] The light signals output from the lens group 550 are incident on the light folding member 560a. The light signals are reflected by the first inclined surface 564a in the light folding member 560a onto the second inclined surface 565a. The reflected light signals are incident on the second inclined surface 565a non-perpendicularly.

[0400] After being refracted by the second inclined surface 565a in the light folding member 560a, the light signals are incident on the surface of the light receiving chip perpendicularly, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the light signals into the light receiving chip.

[0401] FIG. 33 is a schematic diagram of an optical path corresponding to another light receiving component according to some embodiments of the present disclosure. As shown in FIG. 33, the first substrate 510 has a supporting effect.

[0402] The external light signals are received by the fiber adapter 520, and then the light signals enter the optical demultiplexing component 540 in the form of collimated light after being collimated by the collimating lens 530.

[0403] The collimated light is decomposed into multiple light signals by the optical demultiplexing component 540. The multiple light signals are incident on corresponding lenses in the lens group 550, respectively.

[0404] The light signals output from the lens group 550 are incident on the light folding member 560b. The light signals are reflected by the first inclined surface 562b in the light folding member 560b onto the second inclined surface 563b. The reflected light signals are incident on the second inclined surface 563b non-perpendicularly.

[0405] After being refracted by the second inclined surface 563b in the light folding member 560b, the light signals are incident on the surface of the light receiving chip perpendicularly, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the light signals into the light receiving chip.

[0406] FIG. 34 is a schematic diagram of an optical path corresponding to yet another light receiving component according to some embodiments of the present disclosure. As shown in FIG. 34, the first substrate 510 has a supporting effect.

[0407] The external light signals are received by the fiber adapter 520, and then the light signals enter the optical demultiplexing component 540 in the form of collimated light after being collimated by the collimating lens 530.

[0408] The collimated light is decomposed into multiple light signals by the optical demultiplexing component 540. The multiple light signals are incident on corresponding lenses in the lens group 550, respectively.

[0409] The light signals output from the lens group 550 are incident on the light folding member 560c.

[0410] The light signal is incident on the first inclined surface 562c in the light folding piece 560c, and then the light signal output by the first inclined surface 562c is non-perpendicularly incident on the first connecting surface 563c, the light signal output by the first connecting surface 563c is non-perpendicularly incident on the second inclined surface 564c, the light signal output by the second inclined surface 564c is perpendicularly incident on the second connecting surface 565c, and then the light signal finally output by the second connecting surface 565c is perpendicularly incident on the surface of the light receiving chip, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the light incident in the light receiving chip.

[0411] FIG. 35 is a diagram for deriving angles corresponding to a light folding piece according to some embodiments of the present disclosure. As shown in FIG. 35, in the light folding piece 560a, the angle between the first inclined surface 564a and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface 565a and the surface of the light receiving chip is a second angle B.

[0412] In some embodiments, the refractive index of the light folding piece 560a is n.

[0413] In some embodiments, the first angle A and the second angle B have a preset relationship, so that the light finally output by the light folding piece 560a is perpendicularly incident on the surface of the light receiving chip. When deriving the relationship between the first angle A and the second angle B, it is assumed that the light output by the second inclined surface 565a is perpendicularly incident on the surface of the light receiving chip.

[0414] The angle between the reflected light inside the light folding piece 560a and the first inclined surface 564a is angle M, and the angle between the reflected light and the horizontal plane is angle N.

[0415] According to the geometric relationship, it can be derived that the angle between the normal line of the second inclined surface 565a and the horizontal plane is equal to angle B. According to the law of reflection and the geometric relationship, it can be derived that angle M = A and angle N = π-2A. Then the incident angle a of the light incident on the second inclined surface 565a is a = 2A-B.

[0416] According to the geometric relationship, it can be derived that the refraction angle of the light incident on the second inclined surface 565a is B.

[0417] According to the law of refraction, when n*sin(2A-B) = sin B, the light finally output by the light folding piece 560a is perpendicularly incident on the surface of the light receiving chip.

[0418] According to the above description, the first angle A is not 45°. Based on this, angle M is not 45°, and then the exit angle of the first inclined surface 564a is not 45°, and then the incident angle of the first inclined surface 564a is not 45°, which also proves that the angle between the incident light and the exit light of the first inclined surface 564a is not a right angle.

[0419] FIG. 36 is a diagram illustrating derivation of angles corresponding to another light folding piece according to some embodiments of the present disclosure. As shown in FIG. 36, in the light folding piece 560b, the angle between the first inclined surface 562b and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface 563b and the surface of the light receiving chip is a second angle B.

[0420] In some embodiments, the refractive index of the light folding piece 560b is n.

[0421] In some embodiments, the first angle A and the second angle B have a preset relationship, so that the light finally output by the light folding piece 560b is perpendicular to the surface of the light receiving chip.

[0422] For ease of derivation, a parallel line of the second inclined surface 563b at the first inclined surface 562b is taken as an auxiliary line.

[0423] The angle between the reflected light of the first inclined surface 562b and the first inclined surface 562b is an angle M. The angle between the normal line of the second inclined surface 563b and the surface of the light receiving chip is an angle N.

[0424] According to the geometric relationship, it can be known that the angle M = A, and the angle Therefore, the angle

[0425] Further, the angle of incidence of the light incident on the second inclined surface 563b is

[0426] According to the geometric relationship, it can be known that the refraction angle of the light incident on the second inclined surface 563b is B.

[0427] According to the refraction law, n·sin(π / 2-2A+B) = sin B, the light finally output by the light folding piece 560b is perpendicular to the surface of the light receiving chip.

[0428] According to the above description, the first angle A is not 45°. Based on this, the angle M is not 45°, and further, the exit angle of the first inclined surface 562b is not 45°, and further, the angle of incidence of the first inclined surface 562b is not 45°, which also proves that the angle between the incident light and the exit light of the first inclined surface 562b is not a right angle.

[0429] FIG. 37 is a diagram illustrating derivation of angles corresponding to another light folding piece according to some embodiments of the present disclosure. As shown in FIG. 37, in the light folding piece 560c, the angle between the first inclined surface 562c and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface 564c and the surface of the light receiving chip is a second angle B.

[0430] In some embodiments, the refractive index of the light folding piece 560c is n.

[0431] In some embodiments, the first angle A has a preset relationship with the second angle B, so that the light finally output by the light folding member 560c is perpendicular to the surface of the light receiving chip.

[0432] The angle between the first inclined surface 562c and the surface of the light receiving chip is the first angle A. Exemplarily, the first connecting surface 563c is a horizontal surface. Therefore, the angle between the first inclined surface 562c and the first connecting surface 563c is the first angle A.

[0433] The angle between the second inclined surface 564c and the surface of the light receiving chip is the second angle B. Exemplarily, the second connecting surface 565c is a horizontal surface. Therefore, the angle between the second inclined surface 564c and the second connecting surface 565c is the second angle B.

[0434] According to the geometric relationship, the angle between the reflected light of the first inclined surface 562c and the first inclined surface 562c is equal to the angle A.

[0435] Therefore, the angle between the reflected light of the first inclined surface 562c and the vertical line is equal to the angle A.

[0436] The refraction angle at the first connecting surface is the angle γ. According to the refraction law, the angle γ is equal to the angle A. Therefore, the angle γ is equal to the angle A.

[0437] The incident angle of the second inclined surface 564c is the angle α. According to the geometric relationship, the angle α is equal to the angle γ plus the angle B. Therefore, the angle α is equal to the angle γ plus the angle B.

[0438] According to the geometric relationship, the refraction angle at the second inclined surface 564c is the angle B.

[0439] Therefore, according to the geometric law, the sin α is equal to n times the sin B. When the sin {arcsin [n·sin (π / 2-2A)]+B} is equal to n times the sin B, the light finally output by the light folding member 560c is perpendicular to the surface of the light receiving chip.

[0440] According to the above description, the first angle A is not 45°. Based on this, it can also be verified that the angle between the incident light and the exiting light of the first inclined surface 562c is not a right angle.

[0441] In the present disclosure, the light folding member includes a first inclined surface and a second inclined surface. The first inclined surface is a light path turning functional surface, which produces a large turning of the light path transmission direction. The second inclined surface is a light path adjusting functional surface, which further adjusts the turned light path to be perpendicular to the surface of the light receiving chip. In the present disclosure, under the cooperation of the first inclined surface and the second inclined surface, the light signal output by the light folding member is finally perpendicular to the surface of the light receiving chip, so as to adapt to the limited light sensitive surface area of the light receiving chip, thereby avoiding the problem of light blocking and improving the light coupling efficiency into the light receiving chip. At the same time, the light signal reflected by the light receiving chip can be reflected into the air by the second inclined surface, thereby reducing the return loss and reducing the influence on the light receiving signal quality.

[0442] FIG. 38 is a structural diagram of a light receiving component according to some embodiments of the present disclosure. As shown in FIG. 38, in some embodiments, the fiber adapter 520 can receive a light signal including at least a first wavelength λ1 and a second wavelength λ2.

[0443] In some embodiments, the light receiving component 500 can include a reflecting member 590c. The reflecting member 590c is located on the light output side of the fiber adapter 520. The reflecting member 590c is arranged obliquely relative to the light output surface of the fiber adapter 520. The reflecting member 590c is configured to reflect the light signal transmitted to the surface.

[0444] In some embodiments, the light receiving component 500 can include a first lens array 580. The first lens array 580 is located between the reflecting member 590c and the light folding member 560. The first lens array 580 cooperates with the reflecting member 590c to achieve light signal splitting of different wavelengths.

[0445] In some examples, the first lens array 580 can be the filter array or the lens group described in detail in the foregoing embodiments of the present disclosure.

[0446] In some embodiments, different lenses in the first lens array 580 can transmit light signals of different wavelengths and reflect light signals of the remaining wavelengths. The reflecting member 590c is located on the reflected light path of the lens to reflect the light signal towards the next lens, and so on, so as to achieve light signal splitting of different wavelengths.

[0447] In some embodiments, the first lens array 580 includes at least a first lens 581 and a second lens 582. The first lens 581 is located on the light output path of the fiber adapter 520, thereby receiving the light signal including at least the first wavelength λ1 and the second wavelength λ2 output by the fiber adapter 520. The second lens 582 is arranged along the width direction of the circuit board 300 with the first lens 581 to form an array.

[0448] In some embodiments, the first lens 581 has a filtering function for the light signal incident to its surface and a converging function for the light signal output from its surface. The second lens 582 is the same.

[0449] In some embodiments, the first lens 581 is configured to receive the light signal output by the fiber adapter 520 and including at least the first wavelength λ1 and the second wavelength λ2, and to transmit the first wavelength λ1 light signal in the light signal including at least the first wavelength λ1 and the second wavelength λ2, to separate the first wavelength λ1 light signal, and to reflect the second wavelength λ2 light signal toward the reflector 590c. The second lens 582 is configured to receive the second wavelength λ2 light signal reflected by the reflector 590c and to transmit the second wavelength λ2 light signal, to separate the second wavelength λ2 light signal, thereby achieving the light splitting of the first wavelength λ1 light signal and the second wavelength λ2 light signal.

[0450] In some embodiments, the first lens 581 can include a first filtering surface 5811. The filtering is achieved by the first filtering surface 588. The first filtering surface 5811 is toward the reflector 590c. The first filtering surface 5811 is configured to transmit the first wavelength λ1 light signal and to reflect the second wavelength λ2 light signal, to separate the first wavelength λ1 light signal from the second wavelength λ2 light signal. The first filtering surface 5811 is toward the fiber adapter 520 and the reflector 590c, to receive the light signal output by the fiber adapter 520 and including at least the first wavelength λ1 and the second wavelength λ2, and to reflect the second wavelength λ2 light signal to the surface of the reflector 590c.

[0451] The second wavelength λ2 light signal is transmitted to the surface of the reflector 590c and reflected by the reflector 590c to the second lens 582.

[0452] In some embodiments, the first lens 581 can include a first converging surface 5812. The first converging surface 5812 converges the first wavelength light signal, thereby improving the coupling efficiency. The first converging surface 5812 is toward the light folding member 560. The first wavelength λ1 light signal transmitted from the first filtering surface 5811 passes through the inside of the first lens 581 and is incident to the first converging surface 5812, which converges the light signal and then outputs the light signal from the first lens 581 and is incident to the surface of the light folding member 560, thereby achieving the light splitting of the first wavelength light signal.

[0453] In some embodiments, the second lens 582 can include a second filtering surface 5821. The second filtering surface 5821 is toward the reflector 590c, to receive the second wavelength λ2 light signal reflected by the reflector 590c and to transmit the second wavelength λ2 light signal.

[0454] In some embodiments, the second lens 582 can include a second converging surface 5822. The second converging surface 5822 converges the second wavelength light signal, thereby improving the coupling efficiency. The second converging surface 5822 is towards the light turning piece 560. The second wavelength λ2 light signal transmitted from the second filtering surface 5821 passes through the inside of the second lens 582 and is incident to the second converging surface 5822, which converges the light signal and then outputs from the second lens 582 and is incident to the surface of the light turning piece 560, thereby achieving the light splitting of the second wavelength light signal.

[0455] In some embodiments, a collimating lens 530 is arranged on the light path between the fiber adapter 520 and the first lens 581. Since the first wavelength light signal is transmitted from the first lens 581, the reflecting surface 590c does not extend to the corresponding light incident path of the first lens 581.

[0456] In some embodiments, when the reflecting surface of the first lens array 580 that transmits the light signal is towards the reflecting surface 590c, the lens can have different shapes. Taking the first lens 581 as an example, the first filtering surface 5811 and the first converging surface 5812 in the first lens 581 can be arranged in parallel or can be arranged in an inclined manner.

[0457] FIG. 39 is a structure diagram of another light receiving component for light splitting according to some embodiments of the present disclosure, and FIG. 40 is another structure diagram of another light receiving component for light splitting according to some embodiments of the present disclosure. As shown in FIGS. 39 and 40, in some embodiments, the light receiving component 500 can include a first lens array 580a. The first lens array 580a is arranged opposite to the reflecting surface 590c, which is located on the reflecting path of the light signal of the first lens array 580a. The first lens array 580a and the reflecting surface 590c cooperate with each other to achieve the light splitting of the light signals of different wavelengths.

[0458] In some embodiments, the first lens array 580a includes a first lens 581a, a second lens 582a, a third lens 583a, and a fourth lens 584a, so that the first lens array 580a can separate the first wavelength light signal, the second wavelength light signal, the third wavelength light signal, and the fourth wavelength light signal. The first lens 581a, the second lens 582a, the third lens 583a, and the fourth lens 584a are respectively arranged on the surface of the substrate 510. Of course, in some examples, the first lens array 580a can include the first lens 581a, the second lens 582a, and the third lens 583a, so that the first lens array 580a can separate the first wavelength light signal, the second wavelength light signal, and the third wavelength light signal.

[0459] In some embodiments, the first lens 581a can decompose the first wavelength optical signal. The second wavelength optical signal can be decomposed by the second lens 582a and the reflector 590c. The third wavelength optical signal can be decomposed by the third lens 583a and the reflector 590c. The fourth wavelength optical signal can be decomposed by the fourth lens 584a and the reflector 590c, thereby achieving the light splitting of different wavelength optical signals.

[0460] In some embodiments, the first lens 581a, the second lens 582a, the third lens 583a, and the fourth lens 584a have end faces facing the end face of the fiber adapter 520 as filter faces and have end faces facing the end face of the light folding member 560 as converging faces, thereby integrating the filtering and converging functions on one lens and increasing product integration.

[0461] In some embodiments, the first lens 581a can include a first filter face 5811a. The first lens 581a has a first filter film layer disposed on the end face facing the fiber adapter 520, thereby forming the first filter face 5811a. The first filter film layer is configured to transmit the first wavelength optical signal and reflect the second, third, and fourth wavelength optical signals. The first wavelength optical signal is transmitted from the first filter face 5811a to the inside of the first lens 581a, and the second, third, and fourth wavelength optical signals are reflected from the first filter face 5811a.

[0462] In some embodiments, the first filter face 5811a faces the reflector 590c, so as to reflect the second, third, and fourth wavelength optical signals reflected from the surface of the first filter face 5811a to the surface of the reflector 590c.

[0463] In some embodiments, the first lens 581a can include a first converging face 5812a. The first converging face 5812a is an end face outputting the first wavelength optical signal. The first converging face 5812a converges the optical signal transmitted from the first lens 581a, so as to improve the optical coupling efficiency. The first converging face 5812a is disposed opposite to the first filter face 5811a. Exemplarily, the first converging face 5812a and the first filter face 5811a can be disposed opposite to each other in parallel.

[0464] In some embodiments, when the first converging surface 5812a is arranged in parallel with the first filtering surface 5811a, in order to realize the reflection function of the first filtering surface 5811a to the optical signal, the optical axis of the first lens 581a is not in the same axis as the light exit axis of the fiber adapter 520, i.e. the optical axis of the first lens 581a is arranged obliquely relative to the light exit axis of the fiber adapter 520, so that the first filtering surface 5811a is directed towards the reflector 590c. The optical signal reflected from the first filtering surface 5811a is incident on the surface of the reflector 590c.

[0465] In some embodiments, the first filtering surface 5811a, the first converging surface 5812a and the surface of the reflector 590c are arranged in parallel with each other and are arranged obliquely relative to the light exit surface of the fiber adapter 520.

[0466] In some embodiments, the second lens 582a can include a second filtering surface 5821a. The second lens 582a is provided with a second filtering film layer towards the end surface of the fiber adapter 520, which functions as a filtering effect to form the second filtering surface 5821a. The second filtering film layer is configured to transmit the second wavelength optical signal and reflect the third wavelength optical signal and the fourth wavelength optical signal. Then the second wavelength optical signal is transmitted from the second filtering surface 5821a to the inside of the second lens 582a, and the third wavelength optical signal and the fourth wavelength optical signal are reflected from the surface of the second filtering surface 5821a.

[0467] In some embodiments, the second filtering surface 5821a is directed towards the reflector 590c to reflect the third wavelength optical signal and the fourth wavelength optical signal reflected from the surface of the second filtering surface 5821a to the surface of the reflector 590c.

[0468] In some embodiments, the second lens 582a can include a second converging surface 5822a. The second converging surface 5822a is an end surface for outputting the second wavelength optical signal. The second converging surface 5822a converges the optical signal transmitted from the second lens 582a to improve the optical coupling efficiency. The second converging surface 5822a is arranged opposite to the second filtering surface 5821a. For example, the second converging surface 5822a and the second filtering surface 5821a can be arranged in parallel.

[0469] In some embodiments, when the second converging surface 5822a is arranged in parallel with the second filtering surface 5821a, in order to realize the reflection function of the second filtering surface 5821a, the optical axis of the second lens 582a is not in the same axis as the light exit axis of the fiber adapter 520, i.e. the optical axis of the second lens 582a is arranged obliquely relative to the light exit axis of the fiber adapter 520, so that the second filtering surface 5821a is directed towards the reflector 590c, and then the optical signal reflected from the second filtering surface 5821a is incident on the surface of the reflector 590c.

[0470] In some embodiments, the second filter surface 5821a, the second converging surface 5822a, and the surface of the reflector 590c are arranged parallel to each other and are respectively arranged obliquely relative to the light emitting surface of the fiber adapter 520.

[0471] In some embodiments, the third lens 583a can include a third filter surface 5831a. The third lens 583a is provided with a third filter film layer towards the end surface of the fiber adapter 520, which functions as a filter to form the third filter surface 5831a. The third filter film layer is configured to transmit the third wavelength optical signal and reflect the fourth wavelength optical signal. The third wavelength optical signal is transmitted from the third filter surface 5831a to the inside of the third lens 583a, and the fourth wavelength optical signal is reflected from the surface of the third filter surface 5831a.

[0472] In some embodiments, the third filter surface 5831a is towards the reflector 590c to reflect the fourth wavelength optical signal reflected from the surface of the third filter surface 5831a to the surface of the reflector 590c.

[0473] In some embodiments, the third lens 583a can include a seventh converging surface 5832a. The seventh converging surface 5832a is an end surface for outputting the third wavelength optical signal. The seventh converging surface 5832a converges the optical signal transmitted from the third lens 583a to improve the optical coupling efficiency. The third converging surface 5832a is arranged opposite to the third filter surface 5831a. Exemplarily, the seventh converging surface 5832a and the third filter surface 5831a can be arranged parallel to each other.

[0474] In some embodiments, when the seventh converging surface 5832a and the third filter surface 5831a are arranged parallel to each other, in order to realize the reflection function of the third filter surface 5831a, the optical axis of the third lens 583a is not on the same axis as the light emitting axis of the fiber adapter 520, i.e. the optical axis of the third lens 583a is arranged obliquely relative to the light emitting axis of the fiber adapter 520, so that the third filter surface 5831a is towards the reflector 590c, and then the optical signal reflected from the third filter surface 5831a is incident to the surface of the reflector 590c.

[0475] In some embodiments, the third filter surface 5831a, the seventh converging surface 5832a, and the surface of the reflector 590c are arranged parallel to each other and are respectively arranged obliquely relative to the light emitting surface of the fiber adapter 520.

[0476] In some embodiments, the fourth lens 584a can include a fourth filter surface 5841a. The fourth filter surface 5841a is an end surface of the fourth lens 584a for outputting the fourth wavelength optical signal. The fourth lens 584a is provided with a fourth filter film layer on the end surface facing the fiber adapter 520, which functions as a filter to form the fourth filter surface 5841a. The fourth filter film layer is configured to transmit the fourth wavelength optical signal. The fourth wavelength optical signal is then transmitted from the fourth filter surface 5841a to the inside of the fourth lens 584a.

[0477] In some embodiments, the fourth filter surface 5841a faces the reflecting surface 590c to reflect the fourth wavelength optical signal reflected from the surface of the fourth filter surface 5841a to the surface of the reflecting surface 590c.

[0478] In some embodiments, the fourth lens 584a can include an eighth converging surface 5842a. The eighth converging surface 5842a converges the optical signal transmitted from the fourth lens 584a to improve the optical coupling efficiency. The eighth converging surface 5842a is oppositely arranged with the fourth filter surface 5841a. Exemplarily, the eighth converging surface 5842a and the fourth filter surface 5841a can be oppositely arranged in parallel.

[0479] In some embodiments, when the fourth converging surface 5842a and the fourth filter surface 5841a are oppositely arranged in parallel, in order to realize the reflection function of the fourth filter surface 5841a, the optical axis of the fourth lens 584a is not on the same axis as the light exit axis of the fiber adapter 520, i.e. the optical axis of the fourth lens 584a is obliquely arranged relative to the light exit axis of the fiber adapter 520, so that the fourth filter surface 5841a faces the reflecting surface 590c, and then the optical signal reflected from the fourth filter surface 5841a is incident to the surface of the reflecting surface 590c.

[0480] In some embodiments, the fourth filter surface 5841a, the eighth converging surface 5842a, and the surface of the reflecting surface 590c are oppositely arranged in parallel, and are respectively obliquely arranged relative to the light exit surface of the fiber adapter 520.

[0481] In some embodiments, a first filter film layer is arranged on the light entrance surface of the first lens 551, and then the first lens 581a can be obtained. Based on the first filter film layer, the first lens 581a has a filtering function.

[0482] Correspondingly, a second filter film layer is arranged on the light entrance surface of the second lens 552, and then the second lens 582a can be obtained. A third filter film layer is arranged on the light entrance surface of the third lens 553, and then the third lens 583a can be obtained. A fourth filter film layer is arranged on the light entrance surface of the fourth lens 554, and then the fourth lens 584a can be obtained.

[0483] In some embodiments, the first lens 581a, the second lens 582a, the third lens 583a and the fourth lens 584a are disposed on the surface of the substrate 510 obliquely relative to the fiber adapter 520 to direct the reflected light signals to the reflector 590c, so that the first lens 581a, the second lens 582a, the third lens 583a and the fourth lens 584a respectively reflect the light signals to the surface of the reflector 590c. The light signals reflected by the surface of the reflector 590c are reflected to the next lens.

[0484] In some embodiments, since the reflector 590c receives the light signals reflected by the first lens 581a, the reflector 590c does not need to reflect the light signals to the first lens 581a, so the end of the reflector 590c can be arranged to face the first lens 581a.

[0485] In some embodiments, the first lens 581a, the second lens 582a, the third lens 583a and the fourth lens 584a are arranged in an array along the width direction of the circuit board 300. For example, the first converging surface 5812a, the second converging surface 5822a, the seventh converging surface 5832a and the eighth converging surface 5842a are arranged closer and closer to the light folding member 560 along the width direction of the circuit board 300.

[0486] In some embodiments, when the light receiving chips 570 are arranged equidistantly, the distance between the first lens 581a and the second lens 582a, the distance between the second lens 582a and the third lens 583a, and the distance between the third lens 583a and the fourth lens 584a can be the same, so that the light signals incident on the surface of the light folding member 560 are equidistant, and then the light signals are incident on the light receiving chips 570 equidistantly.

[0487] FIG. 41 is a light path diagram of a light receiving component for splitting light according to some embodiments of the present disclosure. As shown in FIG. 41, in some embodiments, the first lens array 580a and the reflector 590c can be used to split light signals of different wavelengths.

[0488] In some embodiments, the optical signals output by the fiber adapter 520 include a first wavelength optical signal λ1, a second wavelength optical signal λ2, a third wavelength optical signal λ3, and a fourth wavelength optical signal λ4. The optical signals including the first wavelength optical signal λ1, the second wavelength optical signal λ2, the third wavelength optical signal λ3, and the fourth wavelength optical signal λ4 are transmitted to the surface of the first lens 581a, wherein the first wavelength optical signal λ1 is transmitted through the first filter surface 5811a, and the optical signals including the second wavelength λ2, the third wavelength λ3, and the fourth wavelength λ4 are reflected by the first filter surface 5811a to the reflecting element 590c. The first wavelength optical signal λ1 transmitted along the first filter surface 5811a passes through the interior of the first lens 581a to the first converging surface 5812a, is converged by the first converging surface 5812a, and is output, and is transmitted to the light folding element 560, thereby achieving light splitting of the first wavelength optical signal λ1.

[0489] The reflecting element 590c reflects the optical signals including the second wavelength optical signal λ2, the third wavelength optical signal λ3, and the fourth wavelength optical signal λ4 to the surface of the second lens 582a. Among them, the second wavelength optical signal λ2 is transmitted through the second filter surface 5821a, and the optical signals including the third wavelength optical signal λ3 and the fourth wavelength optical signal λ4 are reflected by the second filter surface 5821a to the reflecting element 590c. The second wavelength optical signal λ2 transmitted along the second filter surface 5821a passes through the interior of the second lens 582a to the second converging surface 5822a, is converged by the second converging surface 5822a, and is output, and is transmitted to the light folding element 560, thereby achieving light splitting of the second wavelength optical signal λ2.

[0490] The reflecting element 590c reflects the optical signals including the third wavelength optical signal λ3 and the fourth wavelength optical signal λ4 to the surface of the third lens 583a. Among them, the third wavelength optical signal λ3 is transmitted through the third filter surface 5831a, and the fourth wavelength optical signal λ4 is reflected by the third filter surface 5831a to the reflecting element 590c. The third wavelength optical signal λ3 transmitted through the third filter surface 5831a passes through the interior of the third lens 583a to the seventh converging surface 5832a, is converged by the seventh converging surface 5832a, and is output, and is transmitted to the light folding element 560, thereby achieving light splitting of the third wavelength optical signal λ3.

[0491] The reflecting element 590c reflects the fourth wavelength optical signal λ4 to the surface of the fourth lens 584a. The fourth wavelength optical signal λ4 is transmitted through the fourth filter surface 5841a and passes through the interior of the fourth lens 584a to the surface of the eighth converging surface 5842a. After being converged by the eighth converging surface 5842a, it is output and transmitted to the light folding element 560, thereby achieving light splitting of the fourth wavelength optical signal λ4.

[0492] FIG. 42 is a schematic diagram of a light path principle one, according to some embodiments of the present disclosure. As shown in FIG. 42, in some embodiments, the first lens array 580a is disposed opposite to the reflecting member 590c.

[0493] In some embodiments, the angle a is the included angle between the inclined surface of the reflecting member 590c and the vertical surface of the circuit board 300, the distance l is the vertical distance between the second lens 582a and the reflecting member 590c, and the distance m is the beam spacing between two channels.

[0494] The angle a, the distance l, and the distance m have the following relationship:

[0495] n = l * tan a;

[0496] cos a = m / (2l * tan a);

[0497] m = cos a * (2l * tan a) = 2l * sin a.

[0498] FIG. 43 is a structural diagram of a light receiving component implementing light splitting, according to some embodiments of the present disclosure, and FIG. 44 is a light path diagram of a light receiving component implementing light splitting, according to some embodiments of the present disclosure. As shown in FIG. 43 and FIG. 44, in some embodiments, a folding member 590a is disposed on the light path between the fiber adapter 520 and the first lens 581a.

[0499] In some embodiments, a collimating lens 530 is disposed on the light path of the fiber adapter 520. The collimating lens 530 is disposed on the light path of the folding member 590a. The folding member 590a is located between the collimating lens 530 and the first lens 581a. The light entrance surface of the folding member 590a faces the collimating lens 530, and the light exit surface of the folding member 590a faces the first lens 581a.

[0500] In some embodiments, the folding member 590a can change the light entrance angle of the light incident to the surface of the first lens 581a. By refraction of the light by the folding member 590a, the light entrance angle of the first lens 581a is changed, the light is inclined downwardly to enter, and the distance between the first lens array 580a and the reflecting member 590c is pulled in, thereby facilitating miniaturization of the light engine.

[0501] FIG. 45 is a schematic diagram of a light path principle two, according to some embodiments of the present disclosure. As shown in FIG. 45, in some embodiments, the folding member 590a is disposed between the collimating lens 530 and the first lens 581a.

[0502] In some embodiments, angle a is the included angle between the inclined surface of the reflector 590c and the vertical surface of the circuit board 300, distance l is the vertical distance between the second lens 582a and the reflector 590c, distance m is the beam spacing between two channels, and angle b is the refraction angle of the refractor 590a.

[0503] According to the derivation, m = 2l*sinb.

[0504] b = arcsin[n*sin(π / 2-a)];

[0505] m = 2l*sin{arcsin[n*sin(π / 2-a)]}.

[0506] When the collimating lens 530 and the first lens 581a are not provided with the refractor, m = cosa*(2l*tana) = 2l*sin a. When the collimating lens 530 and the first lens 581a are provided with the refractor 590a, m = 2l*sin b. The distance m is the same in the two cases, and angle b is greater than angle a, so the corresponding l when the collimating lens 530 and the first lens 581a are not provided with the refractor is greater than the corresponding l when the collimating lens 530 and the first lens 581a are provided with the refractor 590a. This also confirms that when the collimating lens 530 and the first lens 581a are provided with the refractor 590a, the distance between the first lens array 580a and the reflector 590c can be reduced, and the miniaturization of the light engine can be achieved.

[0507] FIG. 46 is a structural diagram of another light receiving component for light splitting according to some embodiments of the present disclosure, and FIG. 47 is another structural diagram of another light receiving component for light splitting according to some embodiments of the present disclosure. As shown in FIGS. 46 and 47, in some embodiments, a first lens array 580b is provided. The first lens array 580b is arranged opposite to the reflector 590c, and the reflector 590c is located on the reflected light path of the light signal of the first lens array 580b. The first lens array 580b and the reflector 590c cooperate with each other to achieve light splitting of different wavelength light signals.

[0508] In some embodiments, taking the light signal input into the fiber adapter 520 as an example, which includes a first wavelength light signal, a second wavelength light signal, a third wavelength light signal, and a fourth wavelength light signal, the first lens array 580b includes a first lens 581b, a second lens 582b, a third lens 583b, and a fourth lens 584b. The first lens 581b, the second lens 582b, the third lens 583b, and the fourth lens 584b are respectively arranged on the surface of the substrate 510.

[0509] In some embodiments, the first lens 581b can decompose the first wavelength optical signal. The second lens 582b and the reflector 590c can decompose the second wavelength optical signal. The third lens 583b and the reflector 590c can decompose the third wavelength optical signal. The fourth lens 584b and the reflector 590c can decompose the fourth wavelength optical signal, thereby achieving the light splitting of different wavelength optical signals.

[0510] In some embodiments, the first lens 581b can include a first filter surface 5811b. The first lens 581b is provided with a first filter film layer towards the end surface of the fiber adapter 520, which functions as a filter, thereby forming the first filter surface 5811b. The first filter film layer is configured to transmit the first wavelength optical signal and reflect the second, third and fourth wavelength optical signals. The first wavelength optical signal is transmitted from the first filter surface 5811b, and the second, third and fourth wavelength optical signals are reflected from the first filter surface 5811b.

[0511] In some embodiments, the second lens 582b can include a second filter surface 5821b. The second lens 582b is provided with a second filter film layer towards the end surface of the fiber adapter 520, which functions as a filter, thereby forming the second filter surface 5821b. The second filter film layer is configured to transmit the second wavelength optical signal and reflect the third and fourth wavelength optical signals. The second wavelength optical signal is transmitted from the second filter surface 5821b, and the third and fourth wavelength optical signals are reflected from the second filter surface 5821b.

[0512] In some embodiments, the third lens 583b can include a third filter surface 5831b. The third lens 583b is provided with a third filter film layer towards the end surface of the fiber adapter 520, which functions as a filter, thereby forming the third filter surface 5831b. The third filter film layer is configured to transmit the third wavelength optical signal and reflect the fourth wavelength optical signal. The third wavelength optical signal is transmitted from the third filter surface 5831b, and the fourth wavelength optical signal is reflected from the third filter surface 5831b.

[0513] In some embodiments, the fourth lens 584b can include a fourth filter surface 5841b. The fourth lens 584b is provided with a fourth filter film layer towards the end surface of the fiber adapter 520, which functions as a filter, thereby forming the fourth filter surface 5841b. The fourth filter film layer is configured to transmit the fourth wavelength optical signal. The fourth wavelength optical signal is transmitted from the fourth filter surface 5841b.

[0514] In some embodiments, the first lens 581b can include a first converging surface 5812b. The first converging surface 5812b is an end surface for outputting the first wavelength optical signal.

[0515] In some embodiments, the second lens 582b can include a second converging face 5822b. The second converging face 5822b is an end face outputting the second wavelength optical signal.

[0516] In some embodiments, the third lens 583b can include a seventh converging face 5832b. The seventh converging face 5832b is an end face outputting the third wavelength optical signal.

[0517] In some embodiments, the fourth lens 584b can include an eighth converging face 5842b. The eighth converging face 5842b is an end face outputting the fourth wavelength optical signal.

[0518] In some embodiments, the first filter face 5811b, the second filter face 5821b, the third filter face 5831b, and the fourth filter face 5841b are respectively arranged towards the reflector 590c to reflect the optical signals reflected along the surface thereof to the surface of the reflector 590c.

[0519] In some embodiments, when the first filter face 5811b is arranged non-parallel to the first converging face 5812b, in order to achieve the reflection of the optical signals by the first filter face 5811b, the first filter face 5811b can be arranged as an inclined face relative to the light output end face of the fiber adapter 520 to reflect the optical signals to the surface of the reflector 590c. Exemplarily, the first converging face 5812b can be arranged as a straight face relative to the light output end face of the fiber adapter 520 to make the optical signals vertically incident to the surface of the light folding member 560. The remaining lenses can be arranged in the same manner.

[0520] In some embodiments, when the first converging face 5812b is arranged as a straight face relative to the light output end face of the fiber adapter 520 and the first filter face 5811b is arranged as an inclined face relative to the light output end face of the fiber adapter 520, the distance between the first filter face 5811b and the first converging face 5812b is gradually changed so that the first filter face 5811b reflects the second wavelength optical signal to the surface of the reflector 590c. Exemplarily, along the direction shown in FIG. 38, the first filter face 5811b is closer and closer to the first converging face 5812b along the direction from the upper end to the lower end of the first filter face 5811b.

[0521] In some embodiments, the light input face of the first lens 551 is designed as a notched face to form the inclined first filter face 5811b, and the first filter film layer is arranged on the first filter face 5811b, so that the first lens 581b can be obtained. Based on the first filter film layer, the first filter face 5811b has the function of filtering. Based on the inclined arrangement of the first filter face 5811b, the first filter face 5811b has the function of reflecting the optical signals. The remaining lenses can be designed in the same manner.

[0522] In some embodiments, the first lens 581b, the second lens 582b, the third lens 583b, and the fourth lens 584b are arranged in an array along the width direction of the circuit board 300. For example, the first converging surface 5812b, the second converging surface 5822b, the seventh converging surface 5832b, and the eighth converging surface 5842b are arranged closer and closer to the light folding member 560 along the width direction of the circuit board 300.

[0523] In some embodiments, when the light receiving chips 570 are equidistantly arranged, the distance between the first lens 581b and the second lens 582b, the distance between the second lens 582b and the third lens 583b, and the distance between the third lens 583b and the fourth lens 584b can be the same, so that the light signals incident on the surface of the light folding member 560 are equidistant, and then equidistantly incident on the light receiving chips 570.

[0524] FIG. 48 is a light path diagram of another light receiving component for splitting light according to some embodiments of the present disclosure. The light splitting path shown in FIG. 49 has the same principle as the light splitting path shown in FIG. 41, and will not be described in detail. As shown in FIG. 48, in some embodiments, the first wavelength light signal is output from the first lens 581b, the second wavelength light signal is output from the second lens 582b, the third wavelength light signal is output from the third lens 583b, and the fourth wavelength light signal is output from the fourth lens 584b, thereby achieving light splitting.

[0525] FIG. 49 is a structural diagram of another light receiving component for splitting light according to some embodiments of the present disclosure, and FIG. 50 is a light path diagram of another light receiving component for splitting light according to some embodiments of the present disclosure. As shown in FIGS. 49 and 50, in some embodiments, the collimating lens 530 is arranged on the light output path of the fiber adapter 520.

[0526] In some embodiments, the light folding member 590b is arranged between the collimating lens 530 and the first lens 581b. The light folding member 590b has the same effect as the light folding member 590a, which can change the incident angle of the light incident on the surface of the first lens 581b, thereby reducing the distance between the first lens array 580b and the light folding member 590c, and facilitating the miniaturization of the light engine.

[0527] FIG. 51 is an exploded view of the internal structure of another light module according to some embodiments. As shown in FIG. 51, in some embodiments, the circuit board 300 can be formed with an embedding opening 310. The light emitting component 400 can be arranged at the embedding opening 310 of the circuit board 300, so that the light emitting path of the light emitting component 400 can be flush with the upper surface of the circuit board 300.

[0528] In some embodiments, the light receiving component 500 can be arranged on the upper surface of the circuit board 300.

[0529] The light receiving component 500 can be located at one side of the embedding entrance 310, so that the light receiving component 500 can be arranged in parallel with the device of the light emitting component 400 along the width direction of the circuit board 300.

[0530] In some embodiments, the surface of the circuit board 300 can be provided with a DSP chip 330. The DSP chip 330 can process the electrical signal transmitted to the optical network terminal through the golden finger, and also process the electrical signal transmitted to the light receiving component 500.

[0531] In some embodiments, the DSP chip 330 can be integrated with a driving chip inside, and the DSP chip 330 can be connected with the light emitting component 400 through a first signal line to provide a high-frequency driving signal to the light emitting component 400, so that the light emitting component 400 emits light signals under the action of the high-frequency driving signal. For example, the circuit board 300 is provided with a high-frequency signal pad, and the DSP chip 330 can be connected with the high-frequency signal pad through the first signal line, and the high-frequency signal pad is wire-bonded with the laser assembly of the light emitting component 400.

[0532] In some embodiments, the light receiving component 500 can be connected with the DSP chip 330 through a second signal line, so that the DSP chip 330 can process the high-frequency electrical signal transmitted through the second signal line and provided by the light receiving component 500. For example, the light receiving component 500 can be connected with the DSP chip 330 through the second signal line.

[0533] In some embodiments, the laser assembly of the light emitting component 400 includes a laser chip and a second substrate, the laser chip can be placed on the second substrate, the second substrate is provided with a signal line, the laser chip is wire-bonded with one end of the signal line through a first gold wire, and the other end of the signal line is wire-bonded with the circuit board 300 through a second gold wire. Since the first gold wire and the second gold wire are not located on the surface of the second substrate, but are suspended in the air or vacuum, and the dielectric constant of the material of the second substrate is different from that of the air or vacuum, the impedances of the first gold wire and the second gold wire with the signal line are different, which increases the reflection loss of the high-frequency signal and affects the high-frequency signal integrity of the optical module.

[0534] To solve this problem, in some embodiments, the circuit board is formed with a support plate, the support plate and the side wall where the support plate is located form a storage gap, and the laser assembly is placed in the storage gap, so that the support plate and the laser assembly are arranged in parallel along the width direction of the circuit board, the support plate is provided with a signal pad, and the laser chip of the laser assembly can be directly wire-bonded with the signal pad of the support plate without being connected through the second substrate, which can reduce the reflection loss of the high-frequency signal and ensure the high-frequency signal integrity of the optical module.

[0535] FIG. 52 is an exploded view of a light emitting component according to some embodiments. FIG. 53 is an optical path diagram of a light emitting component according to some embodiments. FIG. 54 is a structural diagram of a laser assembly according to some embodiments. As shown in FIG. 52, FIG. 53 and FIG. 54, in some embodiments, the light emitting component 400 can include a laser assembly array 420. The laser assembly array 420 can include laser assemblies 421, which can emit one light signal. For example, the laser assembly array 420 can include 8 laser assemblies arranged side by side along the width direction of the circuit board to emit 8 light signals. The laser assemblies can be 100G EML laser assemblies, and one 100G EML laser assembly emits a 100G light signal of one wavelength according to a high-frequency driving signal, so that the laser assembly array 420 emits 8 100G light signals.

[0536] In some embodiments, the laser assembly 421 can include a laser chip 4211. The laser chip 4211 can emit a light signal.

[0537] In some embodiments, the laser assembly 421 can include a second substrate 4212. The laser chip 4211 can be supported on the second substrate 4212. The laser chip 4211 can be located at one end of the second substrate 4212 away from the first side wall (the side wall close to the gold finger) of the embedding entrance 310.

[0538] In some embodiments, the second substrate 4212 does not have a signal line for relaying electrical signals, and the laser chip 4211 of the laser assembly 421 can only be wire-bonded with the signal pads of the circuit board 300 to achieve electrical connection between the laser chip 4211 and the signal pads of the circuit board 300.

[0539] In some embodiments, the second substrate 4212 is provided with a signal line for relaying electrical signals, and the laser chip 4211 of the laser assembly 421 can be wire-bonded with the signal pads of the circuit board 300 to achieve electrical connection between the laser chip 4211 and the signal pads of the circuit board 300.

[0540] In some embodiments, the second lens array 430 can be a converging lens array, which can converge light signals. The second lens array 430 can be located in the light emitting direction of the laser assembly array 420.

[0541] The second lens array 430 can include lenses to converge at least one light signal. For example, the second lens array 430 includes 8 lenses arranged side by side along the width direction of the circuit board to converge 8 light signals. The converging lens has a light passing surface, and the light signal converges through the light passing surface of the converging lens.

[0542] The second lens array 430 has the same number of lenses as the laser component array 420, so that each laser component of the laser component array 420 corresponds to a lens of the second lens array 430.

[0543] In some embodiments, the second lens array 430 can include a first sub-lens array, which can be a converging lens array, and can converge the light signals emitted by the laser component array.

[0544] In some embodiments, the second lens array 430 can include a second sub-lens array, which can be a collimating lens array, and can collimate the light signals emitted by the laser component array. The second sub-lens array can be located between the laser component array and the first sub-lens array.

[0545] Since the light signals between the first sub-lens array and the second sub-lens array are collimated light, the distance between the first sub-lens array and the second sub-lens array can be short or long, which facilitates the placement of more elements. This flexibility not only increases the emission light path tolerance, making the emission light path more tolerant to changes in the position and angle of the elements, but also improves the stability of the emission light path.

[0546] In some embodiments, the light emission component 400 can include an isolator array 440. The isolator array 440 can prevent the light signals from returning to the laser component array 420 in the original path.

[0547] The isolator array 440 can include at least one isolator to prevent at least one light signal from returning to the laser component array 420 in the original path. For example, the isolator array 440 includes 8 isolators arranged side by side along the width direction of the circuit board to prevent 8 light signals from returning to the laser component array 420 in the original path.

[0548] The isolator array 440 has the same number of isolators as the second lens array 430, so that each isolator of the isolator array 440 corresponds to a lens of the second lens array 430.

[0549] In some embodiments, the light emission component 400 can include a fiber array 450. The fiber array 450 can include optical fibers. The fiber array 450 can be located in the converging direction of the second lens array 430, so that the end faces of the optical fibers of the fiber array 450 can be located at the focal points of the second lens array 430, and thus the optical fibers of the fiber array 450 can transmit the light signals.

[0550] The light path of the light emission component is as follows: the laser component array 420 emits 8 light signals, the 8 light signals are converged by the second lens array 430, pass through the isolator array 440, and are converged to the fiber array 450.

[0551] In some embodiments, the light emitting component 400 can include a Thermo Electric Cooler (TEC) 460. The laser component array 420 can be placed on the TEC 460, so that the working temperature of the laser component array 420 is controlled within a target temperature range. The second lens array 430 can be placed on the TEC 460, so that the central axis of the second lens array 430 is flush with the light exit port of the laser component array 420. For example, the second lens array 430 includes a first sub-lens array, and the first sub-lens array can be placed on the TEC 460. The second lens array 430 includes the first sub-lens array and a second sub-lens array, and the second sub-lens array can be placed on the TEC 460.

[0552] The TEC 460 can include an upper substrate 462 and a lower substrate 461. The upper surface of the upper substrate 462 can carry the laser component array 420 and the second lens array 430. The lower surface of the upper substrate 462 has a second conductive area. The upper surface of the lower substrate 461 has a first conductive area. The first conductive area of the lower substrate 461 and the second conductive area of the upper substrate 462 can be connected by a semiconductor group 465.

[0553] The lower substrate 461 is provided with a first electrode column 463 and a second electrode column 464. One end of the first electrode column 463 is connected to one end of the semiconductor group 465, and one end of the second electrode column 464 is connected to the other end of the semiconductor group 465. The other ends of the first electrode column 463 and the second electrode column 464 are connected to the output end of the driving circuit. The driving circuit provides working current to the TEC 460 to realize heating or cooling of the TEC 460, so that the temperature of the laser component array 420 can be controlled within the target temperature range.

[0554] The MCU can be connected to the driving circuit, so that the MCU can control the output current of the driving circuit, thereby realizing heating or cooling of the TEC 460, so that the working temperature of the laser component array 420 can be controlled within the target temperature range.

[0555] In some embodiments, the light emitting component 400 can include a support plate 480. The support plate 480 can be placed on the TEC 460, and the support plate 480 can support the laser component array 420 and the second lens array 430. The support plate 480 can be heat-conducting, so that the temperature of the laser component array 420 and the second lens array 430 is as equal as possible to the temperature of the TEC 460.

[0556] The support plate 480 can include a first support plate 481. The first support plate 481 can place the laser component array 420 and the second lens array 430.

[0557] The support plate 480 can include a second support plate 482. The second support plate 482 can support the laser component array 420 and the second lens array 430. The first support plate 481 and the second support plate 482 collectively support the laser component array 420 and the second lens array 430 to reduce deformation caused by the first support plate 481 being too large, thereby ensuring that the light exit ports of the individual laser components of the laser component array 420 are level.

[0558] In some embodiments, the light emitting component 400 can include a temperature sensing piece 470. The temperature sensing piece 470 can be located around the laser component array 420. The temperature sensing piece 470 can be used to monitor the temperature around the laser component array 420 and identify the temperature around the laser component array 420 as the operating temperature of the laser component array 420 to enable monitoring of the operating temperature of the laser component array 420.

[0559] In some embodiments, the second support plate 482 is farther away from the first electrode column 463 and the second electrode column 464 of the semiconductor refrigerator 460 than the first support plate 481, and the side of the second support plate 482 close to the first support plate 481 supports the temperature sensing piece 470, so that the temperature sensing piece 470 can be located in the middle of the laser component array 420.

[0560] In some embodiments, the temperature sensing piece 470 can be placed in the middle of the laser component array 420 to facilitate the temperature sensing piece 470 accurately monitoring the temperature around the laser component array 420. For example, the temperature sensing piece 470 can be placed on the side of the second support plate 482 close to the first support plate 481.

[0561] The temperature sensing piece 470 is a temperature-sensitive element whose resistance value changes with temperature, so the temperature around the temperature sensing piece can be determined by the resistance value of the temperature sensing piece 470.

[0562] The temperature sensing piece 470 can be connected to the MCU, so that the MCU can determine the temperature around the temperature sensing piece 470 according to the resistance value of the temperature sensing piece 470, and thus the MCU can control the output current of the driving circuit according to the temperature around the temperature sensing piece 470, thereby enabling heating or cooling of the semiconductor refrigerator.

[0563] In some embodiments, the light emitting component 400 can include a tube shell 410. The middle region of the tube shell 410 can support the various devices of the light emitting component 400, and the edge region of the tube shell 410 can support the circuit board 300.

[0564] The top of the tube shell 410 can include a first support surface 411, which can support the semiconductor refrigerator 460.

[0565] The top of the tube shell 410 can include a dispensing surface 414 for dispensing glue. The dispensing surface 414 can be provided with a second supporting surface 415, which can support the fiber array 450. The dispensing surface 414 and the first supporting surface 411 can be arranged along the length direction of the tube shell 410, so that the optical devices on the semiconductor refrigerator 460 and the fiber array 450 are arranged along the length direction of the tube shell 410. The area of the dispensing surface 414 other than the second supporting surface 415 is a dispensing area, which can be dispensed with glue. The glue in the dispensing area and the second supporting surface 415 are both in contact with the fiber array 450, and after the glue in the dispensing area is cured, a glue body is formed, which fixes the fiber array 450.

[0566] The top of the tube shell 410 can include a fulcrum surface 417, which can be located at the edge of the tube shell 410, i.e., the fulcrum surface 417 is located in the edge area of the tube shell 410. The fulcrum surface 417 can be located in the projection area of the fiber array 450, and there is a gap between the fulcrum surface 417 and the fiber array 450, which facilitates the separation of the fiber array 450 from the tube shell 410 by using the fulcrum surface 417 as a fulcrum.

[0567] The top of the tube shell 410 can include a third supporting surface 413. The third supporting surface 413 can be located in the edge area of the tube shell 410, and can be connected to the lower surface of the side wall of the embedding entrance 310 to support the circuit board 300. The third supporting surface 413 has a height difference with the dispensing surface 414, i.e., the height of the dispensing surface 414 is higher than that of the third supporting surface 413, so that the dispensing surface 414 and the third supporting surface 413 are connected by a connecting surface 416, which is connected to the side surface of the side wall of the embedding entrance 310 to define the position of the circuit board 300 in the width direction of the tube shell 410. For example, the connecting surface 416 can be in contact with one side wall of the embedding entrance 310 of the circuit board 300.

[0568] The top of the tube shell 410 can include a fourth supporting surface 412. The fourth supporting surface 412 can be located between the first supporting surface 411 and the second supporting surface 415, and can support the isolator array 440. The first supporting surface 411 has a height difference with the fourth supporting surface 412, so that the light signal converged by the second lens array 430 arranged above the semiconductor refrigerator 460 can pass through the isolator array 440.

[0569] The top of the tube shell 410 can include a first limiting plate 419. The first limiting plate 419 can be located on the dispensing surface 414. The first limiting plate 419 can be arranged along the length direction of the tube shell 410. The first limiting plate 419 can be located between two adjacent second supporting surfaces 415, and one end of one side of the fiber array 450 can abut one end of one side of the first limiting plate 419, so as to limit the position of the fiber array 450 in the width direction of the tube shell 410. The first limiting plate 419 can be located between two adjacent fourth supporting surfaces 412, and the other end of one side of the isolator array 440 can abut the other end of one side of the first limiting plate 419, so as to limit the position of the isolator array 440 in the width direction of the tube shell 410.

[0570] The top of the tube shell 410 can include a second limiting plate 418. The second limiting plate 418 can be located on the fourth supporting surface 412. The second limiting plate 418 can be arranged along the width direction of the tube shell 410. One end of the second limiting plate 418 can be connected with the end surface of the isolator array 440, so as to limit the position of the isolator array 440 in the length direction of the tube shell 410. The other end of the second limiting plate 418 can be connected with the end surface of the fiber array 450, so as to limit the position of the fiber array 450 in the length direction of the tube shell 410.

[0571] FIG. 55 is a structural diagram of a circuit board according to some embodiments. FIG. 56 is a partial internal structure diagram I of an optical module according to some embodiments. FIG. 57 is a partial internal structure diagram II of an optical module according to some embodiments. As shown in FIGS. 55, 56 and 57, in some embodiments, the first side wall 311 of the embedding entrance 310 of the circuit board 300 is provided with a plurality of supporting plates 312. The supporting plates 312 can be arranged along the length direction of the circuit board 300. The supporting plates 312 can be provided with signal pads 3121. The signal pads 3121 can be wire-connected with the laser chips 4211 of the laser assembly 421.

[0572] The supporting plates 312 and the first side wall 311 of the embedding entrance 310 can enclose a placement gap 313. The placement gap 313 can be used for placing the laser assembly 421. The laser assembly 421 can be placed at the placement gap 313, so that the laser assembly 421 and the supporting plates 312 can be arranged side by side along the width direction of the circuit board 300.

[0573] The laser chips 4211 of the laser assembly 421 are arranged at one end of the second substrate 4212 away from the first side wall 311 of the embedding entrance 310, the supporting plates 312 are provided with the signal pads 3121, and the laser chips 4211 are directly wire-connected with the signal pads 3121 without the need for conversion through the second substrate 4212, which can reduce the reflection loss of high-frequency signals and ensure the high-frequency signal integrity of the optical module.

[0574] In some embodiments, two adjacent laser assemblies 421 are not wire-connected to the same support plate 312 to reduce mutual interference of electrical signals.

[0575] The storage gap 313 can include a first storage gap 3131. The first storage gap 3131 can be enclosed by two adjacent support plates 312 and the first sidewall 311 of the embedding entrance 310. The first storage gap 3131 can place the laser assembly 421.

[0576] The storage gap 313 can include a second storage gap 3132. The second storage gap 3132 can be enclosed by two adjacent support plates 312 and the first sidewall 311 of the embedding entrance 310. The second storage gap 3132 can be located in the middle of the plurality of first storage gaps 3131, so that the second storage gap 3132 can be located in the middle of the storage gap 313. The second storage gap 3132 can place the laser assembly 421 and the temperature sensing element 470, so that the temperature sensing element 470 can be located in the middle of the laser assembly array 420.

[0577] The width dimension of the second storage gap 3132 can be greater than the width dimension of the first storage gap 3131, so that the first storage gap 3131 places the laser assembly 421 and the second storage gap 3132 places the laser assembly 421 and the temperature sensing element 470.

[0578] The storage gap 313 can include a third storage gap 3133. The third storage gap 3133 can be enclosed by the support plate 312, the first sidewall 311 of the embedding entrance 310, and a sidewall connected to the first sidewall 311 of the embedding entrance 310. The third storage gap 3133 can place the laser assembly 421 and the first electrode column 463 and the second electrode column 464 of the semiconductor refrigerator 460.

[0579] The width dimension of the third storage gap 3133 can be greater than the width dimension of the first storage gap 3131, so that the first storage gap 3131 places the laser assembly 421 and the third storage gap 3133 places the laser assembly 421 and the first electrode column 463 and the second electrode column 464 of the semiconductor refrigerator 460.

[0580] The storage gap 313 can include a fourth storage gap 3134. The fourth storage gap 3134 can be enclosed by the support plate 312, the first sidewall 311 of the embedding entrance 310, and another sidewall connected to the first sidewall 311 of the embedding entrance 310. The fourth storage gap 3134 can separate the other sidewall of the embedding entrance 310 of the circuit board 300 from the support plate 312, to avoid damaging the circuit board 300 when the support plate 312 is prepared.

[0581] FIG. 58 is a structural diagram of a circuit board from another perspective, according to some embodiments. FIG. 59 is a partial diagram of the internal structure of an optical module from another perspective, according to some embodiments. As shown in FIG. 58 and FIG. 59, in some embodiments, the thickness of the support plate 312 can be less than the thickness of the first side wall of the embedding entrance 310. That is, the upper surface of the support plate 312 is flush with the upper surface of the first side wall of the embedding entrance 310, and the lower surface of the support plate 312 is not flush with the lower surface of the first side wall of the embedding entrance 310, so that the support plate 312 and the first side wall 311 form an avoiding gap 314, and the avoiding device.

[0582] In some embodiments, the lower surface of the side wall of the embedding entrance 310 is provided with a protection piece 320. The protection piece 320 can be coated with glue to bond the tube shell 410 and the circuit board 300. The protection piece 320 is connected with the third support surface 413 of the tube shell 410, so as to protect the circuit board 300 from being damaged when the tube shell 410 is disassembled.

[0583] The protection piece 320 can include a storage groove 321, and the glue can be placed on the protection piece 320 and in the storage groove 321. The thickness of the glue in the area of the storage groove 321 is greater than that of the glue in other areas, so as to increase the contact area between the tube shell 410 and the circuit board 300, and thus increase the bonding force between the tube shell 410 and the circuit board 300.

[0584] The storage groove 321 can have an opening 3211, and the opening 3211 can face away from the embedding entrance 310. When the glue is too much, the glue does not flow to the embedding entrance 310, avoiding the glue from polluting the light device of the light emitting part 400.

[0585] In some embodiments, the height difference between the lower surface of the support plate 312 and the first support surface 411 is equal to the height difference between the upper surface of the support plate 480 and the first support surface 411, so that the support plate 312 is placed on the support plate 480, that is, the support plate 312 is directly connected with the support plate 480, facilitating the semiconductor refrigerator 460 to adjust the temperature of the support plate 312.

[0586] In some embodiments, the height difference between the lower surface of the support plate 312 and the first support surface 411 is greater than the height difference between the upper surface of the support plate 480 and the first support surface 411, so that there is a gap between the support plate 312 and the support plate 480, that is, the support plate 312 is not connected with the support plate 480, avoiding the upper surface of the support plate 480 from being higher than the lower surface of the support plate 312 due to processing errors, and thus reducing the mutual interference between the support plate 312 and the support plate 480.

[0587] FIG. 60 is a sectional view of an internal structure of a light module according to some embodiments. FIG. 61 is a sectional view of an internal structure of a light module according to some embodiments, from another perspective. As shown in FIG. 60 and FIG. 61, in some embodiments, the circuit board 300 is formed with a relief gap 314 near one end of the embedded entrance 310, which relieves the semiconductor refrigerator 460 and the support plate 480.

[0588] In some embodiments, the laser assembly array 420 is placed on the support plate 480, and there is a gap between the support plate 480 and the bearing plate 312.

[0589] The above description is merely a specific implementation of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any person skilled in the art who thinks of changes or replacements within the technical scope disclosed by the present disclosure should be covered within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be subject to the scope of protection of the claims.

Claims

1. A light module comprising: a circuit board; a light receiving component electrically connected to the circuit board, the light receiving component comprising: a first substrate; a fiber adapter disposed on a surface of the first substrate and configured to receive a light signal comprising at least a first wavelength and a second wavelength; a light receiving chip arranged in an array, the light receiving chip having a light receiving direction perpendicular to the surface of the circuit board; the light receiving chip being configured to convert the received light signal into an electrical signal; a light folding member disposed on the surface of the first substrate and located on an incident light path of the light receiving chip; the light folding member being configured to change a transmission direction of the light signal output by the fiber adapter to be consistent with the light receiving direction of the light receiving chip; a light splitting assembly disposed on the surface of the first substrate and between an output light path of the fiber adapter and an incident light path of the light folding member; the light splitting assembly being configured to split the light signal output by the fiber adapter into multiple light signals; the light splitting assembly comprising a light splitting unit, the light splitting unit comprising a filter and a reflector, the filter and the reflector being respectively disposed obliquely relative to the surface of the first substrate, the filter being disposed away from the reflector relative to the fiber adapter; in the same light splitting unit, the wavelength transmitted by the filter and the wavelength reflected by the filter are different wavelengths, and the wavelength reflected by the filter and the wavelength reflected by the reflector are the same wavelength; the reflector is disposed on an output light path of the wavelength reflected by the filter in the same light splitting unit; when the light splitting assembly comprises one light splitting unit, the reflector reflects the wavelength reflected by the filter in the same light splitting unit towards the light folding member to achieve light splitting; when the light splitting assembly comprises multiple light splitting units, the reflector reflects the wavelength reflected by the filter in the same light splitting unit towards the filter in the next light splitting unit to achieve light splitting; wherein the filters in multiple light splitting units form a first lens array, the first lens array being located between the reflector and the light folding member and comprising at least a first lens and a second lens, the first lens being located on an output light path of the fiber adapter; the first lens comprising a first filter surface and a first converging surface, and the second lens comprising a second filter surface and a second converging surface; wherein the first filter surface faces the fiber adapter and the reflector, and the first converging surface faces the light folding member; the second filter surface faces the reflector, and the second converging surface faces the light folding member; the first filter surface transmits the first wavelength light signal in the light signal comprising at least the first wavelength and the second wavelength to the first converging surface, and reflects the second wavelength light signal to the surface of the reflector; the first converging surface is configured to converge and transmit the first wavelength light signal to the light folding member; the second filter surface receives the second wavelength light signal output by the reflector and transmits the second wavelength light signal to the second converging surface; the second converging surface is configured to converge and transmit the second wavelength light signal to the light folding member.

2. The optical module according to claim 1, wherein The filter arranged opposite to the light path of the fiber adapter is a first filter; and the reflector in the same light splitting unit as the first filter is a first reflector; The collimating lens is arranged between the first filter and the fiber adapter, and the collimating lens and the first reflector are arranged in the same array.

3. The optical module according to claim 1, wherein The light splitting unit corresponding to the last light signal in the light splitting assembly is a last light splitting unit, and the reflector in the last light splitting unit is not arranged with a light transmission part between the reflector and the light splitting part; The vertical distance between the reflector in the last light splitting unit and the reflector in the adjacent light splitting unit is greater than the vertical distance between the adjacent filters, so that the light splitting units emit light to the light splitting part with the same light emission interval.

4. The optical module of claim 1, wherein, The light splitting assembly includes a first light splitting unit and a second light splitting unit, and the reflected wavelength of the reflector in the previous light splitting unit and the transmitted wavelength of the filter in the next light splitting unit are the same wavelength.

5. The optical module of claim 1, wherein, The light splitting assembly includes a first light splitting unit and a second light splitting unit, and the reflected wavelength of the reflector in the previous light splitting unit and the transmitted wavelength of the filter in the next light splitting unit are the same wavelength.

6. The optical module of claim 1, wherein, The light splitting assembly includes a first light splitting unit and a second light splitting unit, and the reflected wavelength of the reflector in the previous light splitting unit and the transmitted wavelength of the filter in the next light splitting unit are the same wavelength. The light splitting part includes at least a third converging surface and a fourth converging surface; 7. The optical module of claim 1, wherein, In the same light splitting unit, the filter can transmit a first wavelength light signal, so that the first wavelength light signal is coupled to the third converging surface, and the filter reflects a second wavelength light signal; the reflector is located on the reflected light path of the second wavelength light signal by the filter, and the reflector can reflect the second wavelength light signal towards the fourth converging surface, so that the second wavelength light signal is coupled to the fourth converging surface. The light splitting unit corresponding to the last light signal in the light splitting assembly is a last light splitting unit; The light splitting unit corresponding to the last light signal in the light splitting assembly is a last light splitting unit; 8. The optical module according to claim 1, wherein The vertical distance between the reflector in the last light splitting unit and the reflector in the adjacent light splitting unit is greater than the vertical distance between the adjacent filters, so that the light splitting units emit light to the light splitting part with the same light emission interval. The filter arranged opposite to the light path of the fiber adapter is a first filter, and the light signal output by the fiber adapter is transmitted to the light input surface of the first filter along a direction parallel to the surface of the first substrate; In the same light splitting unit, the light input surface of the filter and the light input surface of the reflector are arranged in opposite parallel, so that the light signal output by the reflector is emitted along a direction parallel to the surface of the first substrate; 9. The optical module of claim 1, wherein, In the adjacent light splitting units, the connecting line between the reflector in the previous light splitting unit and the filter in the next light splitting unit is arranged in parallel with respect to the length direction of the first substrate, so that the light signal output by the light splitting unit is transmitted to the surface of the light splitting part along a direction parallel to the surface of the first substrate. The first filter surface is provided with a filter film layer that transmits first wavelength light signals and reflects second wavelength light signals, and the second filter surface is provided with a filter film layer that transmits second wavelength light signals. The optical axis of the first lens is not on the same axis as the light-outgoing axis of the fiber adapter, so that the first filter surface faces the reflector and reflects the second wavelength light signal to the reflector surface; The optical axis of the second lens is not on the same axis as the light-outgoing axis of the fiber adapter, so that the second filter surface faces the reflector and receives the second wavelength light signal reflected by the reflector.

10. The optical module of claim 1, wherein, The first filter surface is provided with a filter film layer that transmits the first wavelength light signal and reflects the second wavelength light signal, and the second filter surface is provided with a filter film layer that transmits the second wavelength light signal. The optical axis of the first lens is on the same axis as the optical axis of the second lens along the light-outgoing axis of the fiber adapter; the distance between the first filter surface and the first converging surface gradually changes, so that the first filter surface reflects the second wavelength light signal to the reflector surface.

11. The optical module according to claim 10, wherein The first filter surface and the second filter surface are respectively non-parallel to the light-outgoing end surface of the fiber adapter.

12. The optical module of claim 1, wherein, A folding element is arranged on the optical path between the first lens and the fiber adapter.

13. The optical module of claim 1, wherein, The distance between the first converging surface and the surface of the folding element is greater than the distance between the second converging surface and the surface of the folding element.

14. The optical module of claim 1, wherein, The circuit board is formed with an embedding entrance; The optical module further comprises: An optical emission component embedded in the embedding entrance; The optical emission component comprises: An array of laser assemblies comprising: A laser assembly comprising: A laser chip for emitting an optical signal; A second substrate supporting the laser chip; A second lens array located in the light-outgoing direction of the array of laser assemblies to converge the optical signal; An array of optical fibers located in the converging direction of the second lens array to transmit the optical signal converged by the second lens array; The first side wall of the embedding entrance is formed with: A supporting plate arranged along the length direction of the circuit board and provided with a signal pad; the supporting plate and the first side wall of the embedding entrance form a placement gap, and the laser assembly is placed in the placement gap, so that the laser assembly and the supporting plate are arranged side by side along the width direction of the circuit board; the laser chip is located at one end of the second substrate away from the first side wall of the embedding entrance, and the laser chip is wire-connected with the signal pad.

15. The optical module of claim 14, wherein, The upper surface of the supporting plate is flush with the upper surface of the first side wall of the embedding entrance, and the lower surface of the supporting plate is not flush with the lower surface of the first side wall of the embedding entrance, so that the supporting plate and the first side wall of the embedding entrance form an avoiding gap.

16. The optical module of claim 14, wherein, The optical emission component further comprises: A semiconductor refrigerator supporting the laser assembly and located below the supporting plate; there is a gap between the supporting plate and the semiconductor refrigerator.

17. The optical module of claim 16, wherein, The optical emission component further comprises: A temperature sensing element located in the middle of the array of laser assemblies; The placement gap comprises: A first placement gap surrounded by two adjacent supporting plates and the first side wall of the embedding entrance for placing the laser assembly; A second storage gap is formed by the two adjacent support plates and the first sidewall of the embedding entrance, is located in the middle of the first storage gaps, and is used for placing the laser assembly and the temperature sensing element. A third storage gap is formed by the support plate, the first sidewall of the embedding entrance, and the sidewall connected to the first sidewall of the embedding entrance, and is used for placing the laser assembly and the first electrode column and the second electrode column of the semiconductor refrigerator. The width dimension of the second storage gap is greater than that of the first storage gap, and the width dimension of the third storage gap is greater than that of the first storage gap.

18. The optical module of claim 16, wherein, The light emitting component further includes: A tube shell embedded in the embedding entrance includes: A first support surface supporting the semiconductor refrigerator; A dispensing surface arranged along the length direction of the tube shell; A second support surface located on the dispensing surface and supporting the optical fiber array; A first limiting plate located on the dispensing surface, between the two adjacent second support surfaces, and connected to one side surface of the optical fiber array; A third support surface connected to the lower surface of the sidewall of the embedding entrance and having a height lower than that of the dispensing surface; A connecting surface connected to one side of the dispensing surface and the other side of the third support surface, and connected to the side surface of the sidewall of the embedding entrance.

19. The optical module of claim 18, wherein, The lower surface of the sidewall of the embedding entrance is provided with: A protection element connected to the third support surface of the tube shell and including: A storage groove having an opening, and the opening faces away from the embedding entrance.

20. The optical module of claim 18, wherein, The light emitting component includes: An isolator array located between the second lens array and the optical fiber array; The tube shell further includes: A fourth support surface located between the first support surface and the second support surface and supporting the isolator array; A second limiting plate located on the fourth support surface, arranged along the width direction of the tube shell, connected to the end surface of the optical fiber array at one end, and connected to the end surface of the isolator array at the other end.

21. The optical module of claim 16, wherein, The light emitting component further includes: A temperature sensing element located in the middle of the laser assembly array; A support plate supporting the laser assembly array on the semiconductor refrigerator and including: A first support plate; A second support plate supporting the laser assembly array together with the first support plate, being farther away from the first electrode column and the second electrode column of the semiconductor refrigerator than the first support plate, and supporting the temperature sensing element on the side close to the first support plate.

22. The optical module of claim 14, wherein, The two adjacent laser assemblies are wire-connected to different support plates.

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