Optical module

Abstract

The present disclosure provides an optical module including a light receiving part. The light receiving component is configured to convert a received light signal into an electrical signal. The optical receiving component comprises a substrate, an optical fiber adapter, an optical demultiplexing assembly, an optical receiving chip and a refraction piece. The refraction piece comprises a first inclined plane and a second inclined plane. An optical signal output by the first inclined plane is transmitted along a direction which is not perpendicular to an interface where the optical signal reaches, and the optical signal finally output by the refraction piece is vertically incident to the surface of the optical receiving chip through refraction of the second inclined plane. The first inclined surface is a light path turning functional surface and generates large turning in the light path transmission direction. The second inclined plane is a light path adjusting functional plane, and the turned light path is further adjusted, so that the light signal can be vertically incident to the surface of the light receiving chip to adapt to the limited photosensitive surface area of the light receiving chip, the light blocking problem is avoided, and the coupling efficiency of light incident into the light receiving chip is improved. Meanwhile, return loss can be reduced, and the influence on the quality of light receiving signals is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technology, and in particular to an optical module. Background Art

[0002] With the development of new services and applications such as cloud computing, mobile internet, and video, advances in optical communication technology are becoming increasingly important. As a key component in optical communication equipment, optical modules enable photoelectric signal conversion. As optical communication technology evolves, the data transmission rate of these modules continues to increase. Summary of the Invention

[0003] The optical module provided by the embodiments of the present disclosure is used to improve optical coupling efficiency.

[0004] In a first aspect, an optical module provided by an embodiment of the present disclosure includes:

[0005] circuit boards;

[0006] The light receiving component is electrically connected to the circuit board, and the light receiving component includes:

[0007] substrate;

[0008] an optical fiber adapter disposed on a surface of the substrate and configured to receive an optical signal;

[0009] An optical beam splitter is provided on the surface of the substrate and is configured to split the optical signal output by the optical fiber adapter into multiple optical signals, and the optical path of the optical beam splitter is parallel to the surface of the circuit board;

[0010] A light receiving chip, wherein the light receiving direction of the light receiving chip is perpendicular to the surface of the circuit board, and the light receiving chip is configured to convert the received optical signal into an electrical signal;

[0011] A deflecting element is provided on the surface of the substrate and is provided between the light output path of the optical beam splitter and the light input path of the optical receiving chip. The deflecting element is configured to bend the transmission direction of the optical signal output by the optical beam splitter toward the optical receiving chip. The deflecting element includes:

[0012] a light incident surface configured to receive an optical signal output by the optical beam splitter;

[0013] a first inclined surface disposed toward the light incident surface to receive an optical signal output by the light incident surface, the first inclined surface being inclined relative to a surface of the light receiving chip; the first inclined surface being configured to deflect an optical path of the optical signal transmission toward the light receiving chip; and the optical signal output by the first inclined surface being transmitted in a direction non-perpendicular to the interface at which the optical signal arrives;

[0014] The second inclined surface is arranged toward the first inclined surface to receive the optical signal output by the first inclined surface; the second inclined surface is arranged at an angle relative to the surface of the light receiving chip; the second inclined surface is configured to adjust the optical signal transmission path so that the optical signal is vertically incident on the surface of the light receiving chip.

[0015] In a second aspect, an optical module provided by an embodiment of the present disclosure includes:

[0016] circuit boards;

[0017] The light receiving component is electrically connected to the circuit board, and the light receiving component includes:

[0018] substrate;

[0019] an optical fiber adapter disposed on a surface of the substrate and configured to receive an optical signal;

[0020] An optical beam splitter is provided on the surface of the substrate and is configured to split the optical signal output by the optical fiber adapter into multiple optical signals, and the optical path of the optical beam splitter is parallel to the surface of the circuit board;

[0021] A light receiving chip, wherein the light receiving direction of the light receiving chip is perpendicular to the surface of the circuit board, and the light receiving chip is configured to convert the received optical signal into an electrical signal;

[0022] A deflecting element is provided on the surface of the substrate and is provided between the light output path of the optical beam splitter and the light input path of the optical receiving chip. The deflecting element is configured to bend the transmission direction of the optical signal output by the optical beam splitter toward the optical receiving chip. The deflecting element includes:

[0023] a light incident surface configured to receive an optical signal output by the optical beam splitter;

[0024] a first inclined surface disposed toward the light incident surface and located on an output light path of the light incident surface, the first inclined surface being inclined relative to a surface of the light receiving chip; the first inclined surface being configured to reflect a received light signal to redirect the light signal transmission path toward the light receiving chip; an angle between an incident light ray and an outgoing light ray on the first inclined surface being non-right angles; and an angle between the first inclined surface and the surface of the light receiving chip being a first angle;

[0025] The second inclined surface is arranged toward the first inclined surface and is located on the output light path of the first inclined surface; the second inclined surface is arranged at an angle relative to the surface of the light receiving chip; the second inclined surface is configured to adjust the optical signal transmission path so that the light signal output from the second inclined surface is vertically incident on the surface of the light receiving chip; the angle between the second inclined surface and the surface of the light receiving chip is a second angle, and there is a preset relationship between the first angle and the second angle so that the light signal output from the second inclined surface is vertically incident on the surface of the light receiving chip.

[0026] The optical module provided by the present disclosure includes: a circuit board and a light receiving component. The light receiving component is configured to convert the received optical signal into an electrical signal. The light receiving component includes: a substrate, an optical fiber adapter, an optical beam splitter, an optical receiving chip and a refractive element. The substrate plays a supporting role, supporting the optical fiber adapter, the optical beam splitter, the optical receiving chip and the refractive element respectively. The optical fiber adapter is configured to receive optical signals, and the optical beam splitter is configured to decompose the optical signal output by the optical fiber adapter into multiple optical signals. The light output path of the optical beam splitter is parallel to the surface of the circuit board, while the light receiving direction of the optical receiving chip is perpendicular to the surface of the circuit board. Therefore, a refractive element is provided between the light output path of the optical beam splitter and the light input path of the optical receiving chip. The refractive element has a light path turning function, adjusting the transmission path of the optical signal output by the optical beam splitter from parallel to the surface of the circuit board to perpendicular to the surface of the circuit board, realizing the turning of the light path, and transmitting the optical signal to the surface of the optical receiving chip. In the present disclosure, the refractive element includes a light incident surface, a first inclined surface and a second inclined surface. The light incident surface is configured to receive the light signal output by the beam splitter. The first inclined surface is arranged toward the light incident surface to receive the light signal output by the light incident surface, and the first inclined surface is arranged at an angle relative to the surface of the light receiving chip; the first inclined surface is configured to turn the light signal transmission path toward the light receiving chip; the light signal output by the first inclined surface is transmitted along a direction that is not perpendicular to the interface reached by the light signal. The second inclined surface is arranged toward the first inclined surface to receive the light signal output by the first inclined surface; the second inclined surface is arranged at an angle relative to the surface of the light receiving chip; the second inclined surface is configured to adjust the light signal transmission path so that the light signal is vertically incident on the surface of the light receiving chip. Among them, the first inclined surface is a light path turning functional surface, which produces a larger turning in the light path transmission direction. The second inclined surface is a light path adjustment functional surface, which further adjusts the turned light path to: the light signal is vertically incident on the surface of the light receiving chip. In this disclosure, the coordination of the first and second inclined surfaces allows the optical signal ultimately output by the folding element to be perpendicularly incident on the surface of the optical receiver chip, adapting to the limited photosensitive surface area or aperture of the optical receiver chip. This prevents light blocking and improves the coupling efficiency of light incident on the optical receiver chip. Furthermore, the second inclined surface can reflect the optical signal reflected by the optical receiver chip into the air, thereby reducing return loss and minimizing the impact on the quality of the optical reception signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions of the present disclosure, the following briefly describes the drawings used in some embodiments of the present disclosure. Obviously, the drawings described below are merely illustrations of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0028] Figure 1A partial architecture diagram of an optical communication system provided according to some embodiments of the present disclosure;

[0029] Figure 2 A partial structural diagram of a host computer provided according to some embodiments of the present disclosure;

[0030] Figure 3 A structural diagram of an optical module provided according to some embodiments of the present disclosure;

[0031] Figure 4 An exploded view of an optical module provided according to some embodiments of the present disclosure;

[0032] Figure 5 This is a diagram of the internal structure of an optical module provided according to some embodiments of the present disclosure;

[0033] Figure 6 A cross-sectional structural diagram of a light emitting component provided according to some embodiments of the present disclosure;

[0034] Figure 7 A cross-sectional exploded structural diagram of a light emitting component provided according to some embodiments of the present disclosure;

[0035] Figure 8 A cross-sectional structural diagram of a light receiving component provided according to some embodiments of the present disclosure;

[0036] Figure 9 A structural diagram of a light receiving component provided according to some embodiments of the present disclosure;

[0037] Figure 10 A structural diagram of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure;

[0038] Figure 11 A schematic top view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 1 ;

[0039] Figure 12 A side view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 1 ;

[0040] Figure 13 A side view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 2 ;

[0041] Figure 14 A schematic top view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 2 ;

[0042] Figure 15A structural diagram of a refractive element provided according to some embodiments of the present disclosure;

[0043] Figure 16 A schematic diagram of the relative position relationship between a filter element and a reflector element in a light splitting assembly according to some embodiments of the present disclosure;

[0044] Figure 17 An optical path of a light receiving component provided according to some embodiments of the present disclosure Figure 1 ;

[0045] Figure 18 An optical path of a light receiving component provided according to some embodiments of the present disclosure Figure 2 ;

[0046] Figure 19 A structural diagram of a substrate provided according to some embodiments of the present disclosure;

[0047] Figure 20 A schematic diagram of providing a lens on a substrate surface according to some embodiments of the present disclosure;

[0048] Figure 21 A structural diagram of a light receiving component provided according to some embodiments of the present disclosure;

[0049] Figure 22 A structural diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0050] Figure 23 A structural diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0051] Figure 24 A structural diagram of a refractive element provided according to some embodiments of the present disclosure;

[0052] Figure 25 Another structure of a refractive element provided according to some embodiments of the present disclosure is Figure 1 ;

[0053] Figure 26 Another structure of a refractive element provided according to some embodiments of the present disclosure is Figure 2 ;

[0054] Figure 27 A structure of another refractive element provided according to some embodiments of the present disclosure is Figure 1 ;

[0055] Figure 28 A structure of another refractive element provided according to some embodiments of the present disclosure is Figure 2 ;

[0056] Figure 29A schematic diagram of an optical path corresponding to a refractive element provided according to some embodiments of the present disclosure;

[0057] Figure 30 A schematic diagram of an optical path corresponding to another refractive element provided according to some embodiments of the present disclosure;

[0058] Figure 31 A schematic diagram of an optical path corresponding to another refractive element provided according to some embodiments of the present disclosure;

[0059] Figure 32 A schematic diagram of a light path corresponding to a light receiving component provided according to some embodiments of the present disclosure;

[0060] Figure 33 A schematic diagram of an optical path corresponding to another optical receiving component provided according to some embodiments of the present disclosure;

[0061] Figure 34 A schematic diagram of a light path corresponding to another light receiving component provided according to some embodiments of the present disclosure;

[0062] Figure 35 A schematic diagram of derivation of an angle corresponding to a refractive element provided according to some embodiments of the present disclosure;

[0063] Figure 36 A schematic diagram of angle derivation corresponding to another refractive element provided according to some embodiments of the present disclosure;

[0064] Figure 37 This is a schematic diagram of angle derivation corresponding to another refractive element provided according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0065] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, the embodiments described are only some of the embodiments of the present disclosure, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present disclosure are within the scope of protection of the present disclosure.

[0066] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as open and inclusive, that is, "including, but not limited to"; the terms "first" and "second" are not to be understood as indicating or implying relative importance or indicating an upper limit on quantity; the term "plurality" means two or more; the term "connected" is to be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium; the use of the terms "suitable for" or "configured to" means open and inclusive language, which does not exclude equipment that is suitable for or configured to perform additional tasks or steps; terms such as "parallel", "perpendicular", "same", "consistent", "level" and so on are not limited to absolute mathematical theoretical 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.

[0067] In optical communication technology, to establish information transmission between information processing devices, it is necessary to load the information onto light and use the propagation of light to achieve information transmission. Here, the light loaded with information is an optical signal. When transmitting optical signals within information transmission equipment, they can reduce optical power loss, thereby achieving high-speed, long-distance, and low-cost information transmission. The signals that information processing equipment can recognize and process are electrical signals. Information processing equipment typically includes optical network units (ONUs), gateways, routers, switches, mobile phones, computers, servers, tablets, televisions, etc., and information transmission equipment typically includes optical fibers and optical waveguides.

[0068] Optical modules can convert optical signals into electrical signals between information processing devices and information transmission devices. For example, at least one of the optical signal input or output ends of an optical module is connected to an optical fiber, and at least one of the electrical signal input or output ends of the optical module is connected to an optical network terminal. A first optical signal from the optical fiber is transmitted to the optical module, which converts the first optical signal into a first electrical signal and transmits the first electrical signal to the optical network terminal. A second electrical signal from the optical network terminal is transmitted to the optical module, which converts the second electrical signal into a second optical signal and transmits the second optical signal to the optical fiber. Because multiple information processing devices can transmit information via electrical signals, at least one of the multiple information processing devices needs to be directly connected to the optical module, rather than all of them. Here, the information processing device directly connected to the optical module is referred to as the optical module's host computer. Furthermore, the optical signal input or output end of the optical module can be referred to as an optical port, and the electrical signal input or output end of the optical module can be referred to as an electrical port.

[0069] Figure 1 FIG. 1 is a partial structural diagram of an optical communication system according to some embodiments. Figure 1 As shown, 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 .

[0070] One end of optical fiber 101 extends toward remote information processing device 1000, and the other end of optical fiber 101 is connected to optical module 200 through the optical port of optical module 200. Optical signals can be totally reflected in optical fiber 101, and the propagation of the optical signal in the direction of total reflection can almost maintain the original optical power. The optical signal undergoes multiple total reflections in optical fiber 101 to transmit the optical signal from remote information processing device 1000 to optical module 200, and vice versa, thereby achieving long-distance, low-power information transmission.

[0071] The optical communication system may include one or more optical fibers 101, and the optical fibers 101 may be detachably connected or fixedly connected to the optical module 200. The host computer 100 is configured to provide data signals to the optical module 200, receive data signals from the optical module 200, or monitor or control the operating status of the optical module 200.

[0072] The host computer 100 includes a substantially rectangular housing and an optical module interface 102 disposed on the housing. The optical module interface 102 is configured to connect to the optical module 200 to establish a unidirectional or bidirectional electrical signal connection between the host computer 100 and the optical module 200.

[0073] The host computer 100 also includes an external electrical interface that can access an electrical signal network. For example, the external electrical interface includes a Universal Serial Bus (USB) interface or a network cable interface 104. The network cable interface 104 is configured to access a network cable 103 so that the host computer 100 establishes a unidirectional or bidirectional electrical signal connection with the network cable 103. One end of the network cable 103 is connected to the local information processing device 2000, and the other end of the network cable 103 is connected to the host computer 100, so that an electrical signal connection is established between the local information processing device 2000 and the host computer 100 via the network cable 103. For example, a third electrical signal emitted by the local information processing device 2000 is transmitted to the host computer 100 via the network cable 103. The host computer 100 generates a second electrical signal based on the third electrical signal. The second electrical signal from the host computer 100 is transmitted to the optical module 200. 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 then transmitted to the remote information processing device 1000 via the optical fiber 101. For example, a first optical signal from the remote information processing device 1000 is transmitted through the optical fiber 101. 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. The optical module 200 transmits the first electrical signal to the host computer 100. The host computer 100 generates a fourth electrical signal based on the first electrical signal and transmits the fourth electrical signal to the local information processing device 2000. It should be noted that optical modules are tools for converting optical signals into electrical signals. During this conversion process, the information does not change, but the encoding and decoding methods of the information can change.

[0074] In addition to the optical network terminal, the host computer 100 also includes an optical line terminal (OLT), an optical network device (ONT), or a data center server.

[0075] Figure 2 FIG1 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 the structure of the host computer 100 related to the optical module 200 is shown. Figure 2 As shown, the host computer 100 further includes a PCB 105 disposed within the housing, a cage 106 disposed on the surface of the PCB 105, a heat sink 107 disposed on the cage 106, and an electrical connector disposed within the cage 106. The electrical connector is configured to connect to the electrical port of the optical module 200; the heat sink 107 has protruding structures such as fins to increase the heat dissipation area.

[0076] The optical module 200 is inserted into the cage 106 of the host computer 100. The cage 106 secures the optical module 200. Heat generated by the optical module 200 is transferred to the cage 106 and then dissipated through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 connects 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. Furthermore, the optical port of the optical module 200 connects to the optical fiber 101, thereby establishing a bidirectional optical signal connection between the optical module 200 and the optical fiber 101.

[0077] Figure 3 is a structural diagram of an optical module according to some embodiments. Figure 4 FIG. 1 is an exploded view of an optical module according to some embodiments. Figure 3 and Figure 4 As shown, the optical module 200 includes a housing, a circuit board 300 disposed in the housing, a light emitting component 400, and a light receiving component 500. However, the present disclosure is not limited thereto. In some embodiments, the optical module 200 includes one of the light emitting component 400 and the light receiving component 500.

[0078] The housing includes an upper housing 201 and a lower housing 202 . The upper housing 201 covers the lower housing 202 to form the housing having two openings 204 and 205 . The outer contour of the housing is generally a square.

[0079] In some embodiments, the lower shell 202 includes a base plate 2021 and two lower side plates 2022 located on both sides of the base plate 2021 and arranged perpendicular to the base plate 2021; the upper shell 201 includes 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.

[0080] In some embodiments, the lower shell 202 includes a base plate 2021 and two lower side plates 2022 located on both sides of the base plate 2021 and arranged perpendicularly to the base plate 2021; the upper shell 201 includes a cover plate 2011 and two upper side plates located on both sides of the cover plate 2011 and arranged perpendicularly to the cover plate 2011. The two upper side plates are combined with the two lower side plates 2022 to achieve the upper shell 201 covering the lower shell 202.

[0081] The direction of the line connecting the two openings 204 and 205 may be consistent with the length direction of the optical module 200, or may 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 ( Figure 3 The opening 205 is also located at the end of the optical module 200 ( Figure 3Alternatively, opening 204 is located at the end of optical module 200, while opening 205 is located on the side of optical module 200. Opening 204 is an electrical port, through which the gold finger 301 of circuit board 300 extends and is inserted into the electrical connector of host computer 100; opening 205 is an optical port, configured to receive an external optical fiber 101, thereby connecting optical fiber 101 to the light emitting component 400 and the light receiving component 500 in optical module 200.

[0082] The combined assembly of the upper housing 201 and the lower housing 202 facilitates the installation of the circuit board 300, the light emitting component 400, the light receiving component 500, and the like within the housing. The upper housing 201 and the lower housing 202 provide encapsulation and protection for these components. Furthermore, during assembly of the circuit board 300, the light emitting component 400, and the light receiving component 500, the positioning components, heat dissipation components, and electromagnetic shielding components of these components are easily positioned, facilitating automated production.

[0083] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials, which facilitates electromagnetic shielding and heat dissipation.

[0084] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside its housing. The unlocking component 600 is configured to achieve a 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.

[0085] For example, the unlocking component 600 is located on the outside of the two lower side panels 2022 of the lower housing 202 and includes a snap-fit ​​component that mates with the cage 106 of the host computer 100. When the optical module 200 is inserted into the cage 106, the snap-fit ​​component of the unlocking component 600 secures the optical module 200 in the cage 106. When the unlocking component 600 is pulled, the snap-fit ​​component of the unlocking component 600 moves accordingly, thereby changing the connection between the snap-fit ​​component and the host computer, thereby releasing the optical module 200 from the cage 106 and allowing the optical module 200 to be removed from the cage 106.

[0086] The circuit board 300 includes circuit traces, electronic components, and chips. The electronic components and chips are connected according to the circuit design through the circuit traces to achieve functions such as power supply, electrical signal transmission, and grounding. Electronic components may include, for example, capacitors, resistors, transistors, and metal-oxide-semiconductor field-effect transistors (MOSFETs). Chips may include, for example, microcontroller units (MCUs), laser driver chips, transimpedance amplifiers (TIAs), limiting amplifiers, clock and data recovery chips (CDRs), power management chips, and digital signal processing (DSP) chips.

[0087] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the load-bearing function. For example, the rigid circuit board can stably carry 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.

[0088] The circuit board 300 further includes a gold finger 301 formed on the end surface thereof. The gold finger 301 is composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106, and the gold finger 301 is connected to the electrical connector in the cage 106. The gold finger 301 can be provided on only one side of the circuit board 300 (e.g. Figure 4 The top surface shown in FIG300 can also be located on the upper and lower surfaces of the circuit board 300 to provide a greater number of pins, thus adapting to applications requiring a large number of pins. Gold fingers 301 are configured to establish an electrical connection with a host computer to facilitate power supply, grounding, two-wire synchronous serial (Inter-Integrated Circuit, I2C) signal transmission, data signal transmission, and more. Of course, some optical modules also use flexible circuit boards. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement them.

[0089] At least one of the light emitting component 400 or the light receiving component 500 is located on a side of the circuit board 300 away from the gold finger 301 .

[0090] In some embodiments, the light emitting component 400 and the light receiving component 500 are physically separated from the circuit board 300 and then electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connectors.

[0091] In some embodiments, at least one of the light emitting component or the light receiving component may be directly disposed on the circuit board 300. For example, at least one of the light emitting component or the light receiving component may be disposed on a surface of the circuit board 300 or a side of the circuit board 300.

[0092] Figure 5 FIG. 1 is an internal structure diagram of an optical module provided according to some embodiments of the present disclosure. Figure 5 As shown, in some embodiments, the light emitting component 400 and the light receiving component 500 are arranged side by side on the surface of the circuit board 300.

[0093] In some embodiments, the light emitting component 400 and the light receiving component 500 may also be arranged on the surface of the circuit board 300 in an upper and lower relationship.

[0094] Figure 6 A cross-sectional structural diagram of a light emitting component provided according to some embodiments of the present disclosure; Figure 7 FIG1 is a cross-sectional exploded structural diagram of a light emitting component provided according to some embodiments of the present disclosure. Figure 6 and Figure 7 As shown, in some embodiments, a notch 303 is formed on the surface of the circuit board, and the light emitting component 400 is embedded in the notch 303 .

[0095] The light emitting component 400 may include a carrier 410. The carrier 410 plays a supporting role. The circuit board 300 has a notch 303 on its surface, and the carrier 410 may be embedded in the notch 303.

[0096] The light emitting component 400 may include a TEC 420 . The TEC 420 is disposed on a surface of the carrier 410 .

[0097] The light emitting component 400 may include a laser 430. The laser 430 is disposed on the surface of the TEC 420. The laser 430 may be arranged in an array.

[0098] The light emitting component 400 may 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 may be arranged in an array.

[0099] The optical emitting component 400 may include an optical multiplexing assembly 450. The array of lasers 430 emits light beams of different wavelengths, which are then combined by the optical multiplexing assembly 450 and finally output from the optical multiplexing assembly 450 as a single beam of light.

[0100] The optical emitting component 400 may include a converging lens 460. The converging lens 460 is provided on the optical outgoing path of the optical multiplexing component 450 and performs converging processing on the optical signals outputted by the optical multiplexing component 450 to improve the optical coupling efficiency.

[0101] The light emitting component 400 may include a fiber optic adapter 470. The fiber optic adapter 470 is used to output a final light beam.

[0102] In some embodiments, the surface of the carrier 410 is formed with multiple surfaces of different heights to match the optical paths of various optical elements disposed on the surface.

[0103] Exemplarily, a first carrying surface 411 , a second carrying surface 412 and a third carrying surface 413 are formed on the surface of the carrying member 410 .

[0104] Since TEC420 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 bonding length between the two and ensuring high-frequency signal transmission performance, the position of the first bearing surface 411 is lower than the position of the second bearing surface 412, so as to form a groove on the bearing member 410, and the TEC420 is set in the groove so that the TEC420 sinks, thereby achieving the surface of the laser 430 being flush with the surface of the circuit board 300.

[0105] The surface of the second bearing surface 412 supports and arranges the optical multiplexing component 450 and the converging lens 460 .

[0106] The third bearing surface 413 supports and sets the optical fiber adapter 470 .

[0107] Exemplarily, the surface height of the second bearing surface 412 is higher than the surface height of the third bearing surface 413 to ensure that the optical paths of the optical elements disposed on the surfaces are highly matched.

[0108] Figure 8 A cross-sectional structural diagram of a light receiving component provided according to some embodiments of the present disclosure; Figure 9 FIG. 1 is a structural diagram of a light receiving component provided according to some embodiments of the present disclosure. Figure 8 and Figure 9 As shown, in some embodiments, the light receiving component 500 is disposed on a surface of the circuit board 300 .

[0109] The light receiving part 500 may include a substrate 510 .

[0110] For example, compared with other structures, the thermal expansion coefficient of the substrate 510 is relatively small, and thus a thermal expansion coefficient mismatch phenomenon is likely to occur between the substrate 510 and other materials.

[0111] When the substrate 510 is electrically connected to the circuit board 300, the thermal expansion coefficients of the substrate 510 and the circuit board 300 do not match. For example, the thermal expansion coefficient of the circuit board 300 is greater than that of the substrate 510, which can easily cause deformation and cracking of the substrate 510. Therefore, an intermediate portion 500a is provided between the substrate 510 and the circuit board 300. The intermediate portion 500a has a lower thermal expansion coefficient, matching the thermal expansion coefficients of the substrate 510 and the circuit board 300.

[0112] A recess 302 may be formed on the surface of the circuit board 300 , the middle portion 500 a is disposed on the surface of the recess 302 , and then the substrate 510 is disposed on the surface of the middle portion 500 a .

[0113] Exemplarily, a light receiving chip is provided on the surface of the circuit board 300, and a lens and a refracting element are provided on the surface of the substrate 510. The optical path of the optical signal output by the lens is turned at the refracting element to transmit the optical signal to the surface of the light receiving chip.

[0114] The middle portion 500a is positioned on one side of the optical receiver chip. This raises the height of the substrate 510, thereby increasing the distance between the deflector and the optical receiver chip. The recess 302 offsets this increase in height, lowering the height of the substrate 510 to match the distance between the deflector and the optical receiver chip, ensuring that the light spot formed by the optical signal output by the deflector falls on the optical receiver chip.

[0115] The optical receiving component 500 may include an optical fiber adapter 520. The optical fiber adapter 520 is configured to fix the end of an optical fiber and couple an optical signal.

[0116] The light receiving component 500 may include a collimating lens 530 . The collimating lens 530 is disposed on the light output path of the optical fiber adapter 520 . The collimating lens 530 collimates the optical signal output by the optical fiber adapter 520 .

[0117] The light receiving component 500 may include a beam splitter, which can split a received optical signal into multiple optical signals.

[0118] In some embodiments, the optical beam splitter may be an optical demultiplexing component 540 , which decomposes an optical signal into multiple optical signals, thereby enabling reception of multiple optical signals.

[0119] In some embodiments, the optical beam splitter may be an arrayed waveguide grating (AWG), which decomposes a received optical signal into multiple optical signals and then redirects the optical paths, thereby transmitting the multiple optical signals to the surface of the optical receiving chip.

[0120] In some embodiments, the optical beam splitter may be a beam splitting assembly, which includes a filter array and a reflector array. A filter and a corresponding reflector constitute a beam splitting unit, and the beam splitting assembly includes at least one beam splitting unit.

[0121] In the same spectroscopic unit, the wavelengths transmitted and reflected by the filter are different, while the wavelengths reflected by the filter and the wavelength reflected by the reflector are the same, thereby achieving spectroscopic separation. When the spectroscopic assembly includes multiple spectroscopic units, the reflector in adjacent spectroscopic units reflects the wavelengths reflected by the filter in the same spectroscopic unit toward the filter in the next spectroscopic unit, whereupon the wavelengths are reflected or transmitted by the filter in the next spectroscopic unit, thereby achieving spectroscopic separation.

[0122] Each optical splitting unit outputs a light signal of a different wavelength, thus achieving the splitting of multiple optical signals. The filter array and reflector array are each placed in air. The refractive index of air is relatively stable compared to other media, ensuring optical path stability and optical coupling efficiency. Other media may experience crystal transformations due to stress, affecting the stability of their refractive index.

[0123] Figure 10 A structural diagram of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure; Figure 11 A schematic top view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 1 .like Figure 10 and Figure 11 As shown, in some embodiments, a light splitting component 590 is provided between the outgoing light path of the optical fiber adapter 520 and the incoming light path of the light refraction element 560 .

[0124] In some embodiments, the light splitting component 590 includes at least one light splitting unit, which is composed of a filter element and a corresponding reflector.

[0125] Exemplarily, when the optical splitting component 590 includes one optical splitting unit, it can realize the reception of two optical signals.

[0126] Exemplarily, when the optical splitting component 590 includes three optical splitting units, it can achieve the reception of four optical signals.

[0127] Exemplarily, when the optical splitting component 590 includes seven optical splitting units, it can receive eight optical signals.

[0128] In some embodiments, in the same spectroscopic unit, the wavelength transmitted 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, thereby achieving spectroscopic effect.

[0129] For example, within a single optical splitter unit, the filter element can transmit a first wavelength optical signal and reflect a second wavelength optical signal. The reflector element is disposed in the optical path of the second wavelength optical signal reflected by the filter element, and can reflect the second wavelength optical signal. When the optical splitter assembly includes a single optical splitter unit, the reflector element reflects the second wavelength optical signal toward the deflector element. When the optical splitter assembly includes multiple optical splitter units, the reflector element reflects the second wavelength optical signal toward the filter element in the next optical splitter unit.

[0130] Since the filter element can transmit the first wavelength optical signal, the first wavelength optical signal is transmitted through the filter element to a light inlet of the refracting element, thereby decomposing the first wavelength optical signal.

[0131] The second wavelength optical signal reflected by the filter element reaches the reflector element, and the reflector element transmits the second wavelength optical signal toward another optical port of the refracting element, thereby decomposing the second wavelength optical signal.

[0132] The following is an illustrative description using an example in which the optical splitting component 590 includes three optical splitting units and implements four-path optical signal reception.

[0133] In some embodiments, the optical splitter component 590 includes a first filter 591 , a second filter 593 , and a third filter 595 .

[0134] For example, the first filter element 591, the second filter element 593, and the third filter element 595 are in the same column, forming a filter element array. The individual filter elements are combined together to form the filter element array. There is a certain gap between adjacent filter elements.

[0135] In some embodiments, the light splitting component 590 includes a first reflective element 592 , a second reflective element 594 , and a third reflective element 596 .

[0136] For example, the first reflector 592, the second reflector 594, and the third reflector 596 are in the same row, forming a reflector array. The individual reflectors are combined to form the reflector array. There is a certain gap between adjacent reflectors.

[0137] In the present disclosure, the first filter 591 and the first reflector 592 form a first optical splitter unit. For example, the first filter 591 is arranged facing the light output path of the optical fiber adapter 520. From the perspective of position, the first optical splitter unit is the first optical splitter unit.

[0138] In the present disclosure, the second filter element 593 and the second reflector 594 form a second light splitting unit.

[0139] In the present disclosure, the third filter element 595 and the third reflector 596 form a third light splitting unit. From the perspective of position, the third light splitting unit is the last light splitting unit.

[0140] In some embodiments, the first filter element 591 can transmit the first wavelength optical signal and reflect the optical signal including the second wavelength optical signal, the third wavelength optical signal, and the fourth wavelength optical signal, and the first reflector 592 can reflect the optical signal including the second wavelength optical signal, the third wavelength optical signal, and the fourth wavelength optical signal.

[0141] In some embodiments, the second filter 593 can transmit the second wavelength optical signal and reflect the optical signal including the third wavelength optical signal and the fourth wavelength optical signal, and the second reflector 594 can reflect the optical signal including the third wavelength optical signal and the fourth wavelength optical signal.

[0142] In some embodiments, the third filter 595 may transmit the third wavelength optical signal and reflect the fourth wavelength optical signal, and the third reflector 596 may reflect the fourth wavelength optical signal.

[0143] In some embodiments, the first filter 591 transmits the first wavelength optical signal, thereby coupling the first wavelength optical signal into the first light inlet of the refracting element. At the same time, the first filter 591 reflects the optical signal including the second wavelength optical signal, the third wavelength optical signal, and the fourth wavelength optical signal.

[0144] In some embodiments, the first reflective element 592 is located on the reflected light path of the first filter element 591 to receive the light signal reflected by the first filter element 591 .

[0145] In some embodiments, the second filter 593 is located in the reflected light path of the first reflector 592 to receive the optical signal reflected by the first reflector 592 and transmit the second wavelength optical signal, thereby coupling the second wavelength optical signal into the second light inlet of the refracting element. Simultaneously, the second filter 593 reflects the optical signal including the third wavelength optical signal and the fourth wavelength optical signal.

[0146] In some embodiments, the second reflective element 594 is located on the reflected light path of the second filter element 593 to receive the light signal reflected by the second filter element 593 .

[0147] In some embodiments, the third filter element 595 is located in the reflected light path of the second reflector 594 to receive the optical signal reflected by the second reflector 594 and transmit the third wavelength optical signal, thereby coupling the third wavelength optical signal into the third light inlet of the refracting element, while reflecting the fourth wavelength optical signal.

[0148] In some embodiments, the third reflector 596 is located on the reflection path of the fourth wavelength optical signal by the third filter 595 to receive the fourth wavelength optical signal reflected by the third filter 595 and transmit the fourth wavelength optical signal, thereby coupling the fourth wavelength optical signal into the fourth light inlet of the refractive element.

[0149] In some embodiments, the first reflector 592 is located on the reflection path of the first filter 591 for the second wavelength optical signal. Figure 11 In the shown orientation, the first reflective element 592 is located to the lower right of the first filter element 591 , and the area between the first filter element 591 and the optical fiber adapter 520 is relatively empty.

[0150] In some embodiments, the collimating lens 530 is disposed in the area between the first filter element 591 and the fiber adapter 520. For example, the collimating lens 530 and the reflector array are located on the same array, thereby reducing the area of ​​the substrate 510, facilitating miniaturization of the light receiving component, and adapting to the design of a small-sized light engine.

[0151] In some embodiments, the first filter 591, the second filter 593, and the third filter 595 can each be in the form of a filter. The input and output light paths of the first filter 591, the second filter 593, and the third filter 595 are offset in height, and the input and output light paths are parallel to each other.

[0152] In some embodiments, the collimating lens 530 emits light horizontally. "Horizontal" means parallel to the surface of the substrate 510. Therefore, the light signal incident on the first filter 591 is horizontal light, and the light emitted by the first filter 591 is also horizontal light.

[0153] In the present disclosure, when the collimating lens 530 emits light horizontally, in the same spectroscopic unit, the light incident surface of the filter element and the light incident surface of the reflector are arranged relatively parallel to each other, so that the light signal output by the reflector is emitted in a direction parallel to the surface of the substrate, that is, the reflector emits light horizontally.

[0154] In the present disclosure, when the collimating lens 530 emits light horizontally, in the adjacent splitting units, the connecting line between the reflective element in the previous splitting unit and the filtering element in the next splitting unit is arranged parallel to the length direction of the substrate, so that the output light signal of each splitting unit is transmitted to the surface of the refractive element in a direction parallel to the surface of the substrate, that is, each splitting unit emits light horizontally.

[0155] Exemplarily, the connecting line between the first reflector 592 and the second filter element 593 is arranged parallel to the length direction of the substrate, that is, the connecting line between the two is parallel to the connecting line between the collimating lens 530 and the first filter element 591, so as to ensure that the first reflector 592 emits light horizontally, and thus ensure that the second filter element 593 emits light horizontally.

[0156] Exemplarily, the connecting line between the second reflector 594 and the third filter element 595 is arranged parallel to the length direction of the substrate, that is, the connecting line between the two is parallel to the connecting line between the collimating lens 530 and the first filter element 591, so as to ensure that the second reflector 594 emits light horizontally, and thus ensure that the third filter element 595 emits light horizontally.

[0157] Exemplarily, the light incident surface of the third filter element 595 and the light incident surface of the third reflector 596 are arranged relatively parallel to each other, so that the third reflector 596 emits light horizontally.

[0158] In the present disclosure, the vertical spacing between adjacent filtering elements is the same, and the vertical spacing between reflecting elements is the same, so that each light splitting unit emits light toward the refracting element with the same light emitting spacing.

[0159] In the present disclosure, the placement positions or angles of the various filtering components and the various reflecting components can be flexibly adjusted to adapt to different types of optical module products, thereby having strong versatility.

[0160] Figure 12 A side view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 1 .like Figure 12 As shown, in some embodiments, the light splitting unit corresponding to the last light signal decomposed by the light splitting assembly is set as the last light splitting unit. A light-transmitting portion can be provided between the reflective element and the light-reflecting element in the last light splitting unit. The light-transmitting portion can transmit the last light signal so that the last light signal is coupled to the light input end of the light-reflecting element.

[0161] Taking four-way optical reception as an example, the optical splitting component 590 includes a first optical splitting unit, a second optical splitting unit, and a third optical splitting unit to realize four-way optical signal reception. Exemplarily, the third optical splitting unit is the optical splitting unit corresponding to the decomposition of the fourth wavelength optical signal, and the third optical splitting unit is the last optical splitting unit.

[0162] The light signal with the fourth wavelength reflected by the third reflector 596 is directed toward the fourth light entrance of the light-reflecting element.

[0163] In some embodiments, the area between the third reflector 596 and the fourth light entrance is relatively empty. In order to improve the light coupling efficiency, a light-transmitting portion 597 may be provided between the third reflector 596 and the fourth light entrance.

[0164] The light-transmitting portion 597 can transmit the optical signal with the fourth wavelength, so as to be coupled to the fourth light incident port of the light-bending element.

[0165] The provision of the light-transmitting portion 597 can increase the optical coupling efficiency of the fourth wavelength optical signal, thereby increasing the light receiving sensitivity of the fourth wavelength optical signal.

[0166] Figure 13 A side view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 2 , Figure 14 A schematic top view of a light receiving component corresponding to a light splitting component provided according to some embodiments of the present disclosure Figure 2 .like Figure 13 and Figure 14 As shown, the light splitting unit corresponding to the last optical signal decomposed by the light splitting component is set as the last light splitting unit, and no light-transmitting portion is provided between the reflective element and the refracting element in the last light splitting unit.

[0167] In some embodiments, when no light-transmitting portion is provided between the reflective element and the refractive element in the last spectroscopic unit, the vertical spacing between the reflective element in the last spectroscopic unit and the reflective element in the adjacent spectroscopic unit is greater than the vertical spacing between adjacent filtering elements, so that each spectroscopic unit emits light toward the refractive element with the same light-emitting spacing.

[0168] Taking four-way optical reception as an example, the optical splitting component 590 includes a first optical splitting unit, a second optical splitting unit, and a third optical splitting unit to realize four-way optical signal reception. Exemplarily, the third optical splitting unit is the optical splitting unit corresponding to the decomposition of the fourth wavelength optical signal, and the third optical splitting unit is the last optical splitting unit.

[0169] The light signal with the fourth wavelength reflected by the third reflector 596 is directed toward the fourth light entrance of the light-reflecting element.

[0170] In some embodiments, no light-transmitting portion is disposed between the third reflector 596 and the fourth light entrance, and the area between the third reflector 596 and the fourth light entrance is relatively empty.

[0171] In the present disclosure, each light splitting unit emits light toward the light refraction element 560 at the same light emitting distance.

[0172] In some embodiments, a light-transmitting portion 597 may be provided between the third reflector 596 and the fourth light inlet. In this case, the vertical spacing between adjacent filters is the same, the vertical spacing between adjacent reflectors is the same, and the vertical spacing between adjacent filters and the vertical spacing between adjacent reflectors remain the same, so that each light-splitting unit emits light toward the deflecting element 560 with the same light-emitting spacing.

[0173] The first filter element 591, the second filter element 593, and the third filter element 595 have the following characteristics: when light signals of different wavelengths are horizontally incident on the corresponding filter elements, the light output direction of the filter elements is the same as the light input direction, and the light output optical path of the filter elements is displaced downward in height compared to the light input optical path.

[0174] Exemplarily, the first filter element 591, the second filter element 593, and the third filter element 595 are configured as filter plates, which have the aforementioned characteristics.

[0175] The displacement of the light-emitting optical path caused by the first filter 591 , the second filter 593 , and the third filter 595 affects the light-emitting spacing.

[0176] Exemplarily, if the filter elements are of the same model, the displacement between the light output path and the light input path of each filter element is the same, so as not to affect the light output of each splitting unit at the same light output distance.

[0177] Exemplarily, when a light-transmitting portion 597 may be provided between the third reflector 596 and the fourth light inlet, the light-transmitting portion 597 has the characteristics of the above-mentioned filter element, and the light-transmitting portion 597 can act as the above-mentioned filter element. Then, the setting of the light-transmitting portion 597 can also cause the light output path of the fourth wavelength optical signal to be displaced in height. The displacement produced is the same as the displacement produced by the light output path of the first filter element 591, the second filter element 593, and the third filter element 595, thereby ensuring that optical signals of different wavelengths are emitted at the same light output spacing.

[0178] For example, the vertical spacing between the light-transmitting portion 597 and the third filter 595, the vertical spacing between the third filter 595 and the second filter 593, and the vertical spacing between the second filter 593 and the first filter 591 are all equal. It can be seen that the provision of the light-transmitting portion 597 can compensate for the displacement of the light output path caused by the filters for the fourth wavelength optical signal, thereby ensuring that the fourth wavelength optical signal and the other wavelength optical signals are emitted at the same light output spacing.

[0179] Exemplarily, the vertical spacing between the third reflector 596 and the second reflector 594, the vertical spacing between the second reflector 594 and the first reflector 592, and the vertical spacing between the first reflector 592 and the collimating lens 530 are the same to ensure that light signals of different wavelengths are emitted at the same light-emitting spacing.

[0180] Exemplarily, the vertical spacing between the light-transmitting portion 597 and the third filter element 595 is the same as the vertical spacing between the third reflector 596 and the second reflector 594 to ensure that optical signals of different wavelengths are emitted at the same light-emitting spacing.

[0181] In some embodiments, no light-transmitting portion is provided between the third reflector 596 and the fourth light inlet. In this case, the light-transmitting portion cannot compensate for the displacement of the light path caused by the filter element for the fourth wavelength optical signal, and thus cannot ensure that the fourth wavelength optical signal and other wavelength optical signals are emitted at the same light-emitting spacing.

[0182] For example, Figure 13Taking the orientation shown as an example, in order to ensure that the fourth wavelength optical signal and other wavelength optical signals are emitted at the same light-emitting spacing, the setting position of the third reflector 596 can be moved to the lower right relative to the second reflector 594. At this time, the vertical spacing between the third reflector 596 and the second reflector 594 is greater than the vertical spacing between the second reflector 594 and the first reflector 592, so as to compensate for the light-emitting spacing of the fourth wavelength optical signal and ensure that the fourth wavelength optical signal and other wavelength optical signals are emitted at the same light-emitting spacing.

[0183] Exemplarily, the vertical spacing between the third reflector 596 and the second reflector 594 is greater than the vertical spacing between the second reflector 594 and the first reflector 592, wherein the vertical spacing between the second reflector 594 and the first reflector 592 is equal to the vertical spacing between the third filter element 595 and the second filter element 593, so the vertical spacing between the third reflector 596 and the second reflector 594 is greater than the vertical spacing between the third filter element 595 and the second filter element 593.

[0184] By adjusting the position of the third reflector 596 , the light output spacing of the fourth wavelength optical signal is compensated, ensuring that the fourth wavelength optical signal and other wavelength optical signals are output at the same light output spacing.

[0185] Exemplarily, when no light-transmitting portion is provided between the third reflector 596 and the fourth light entrance, the vertical spacing between the third reflector 596 and the second reflector 594 is set to a first vertical spacing. When a light-transmitting portion 597 is provided between the third reflector 596 and the fourth light entrance, the vertical spacing between the third reflector 596 and the second reflector 594 is set to a second vertical spacing. The first vertical spacing is greater than the second vertical spacing to compensate for the light-emission spacing of the fourth wavelength optical signal, ensuring that optical signals of each wavelength are emitted at the same light-emission spacing.

[0186] It can be understood that when no light-transmitting portion is provided between the third reflector 596 and the fourth light entrance, the position of the third reflector 596 moves further toward the lower right of the second reflector 594 relative to when a light-transmitting portion 597 is provided between the third reflector 596 and the fourth light entrance.

[0187] Figure 15 FIG. 1 is a structural diagram of a refractive element provided according to some embodiments of the present disclosure. Figure 15 As shown, in some embodiments, respective converging surfaces 550a1 are formed on the light incident end surface of the light refraction element 560 to perform converging processing on the received optical signals.

[0188] In some embodiments, the converging surface 550a1 may be a converging lens surface.

[0189] The light-incident end faces of the refraction element 560 are respectively formed with converging surfaces 550a1, so there is no need to separately set a converging lens array on the surface of the substrate 510, thereby reducing the size of the substrate 510, realizing the miniaturization of the light receiving component, and adapting to the design of a small-sized light engine.

[0190] In some embodiments, taking the reception of four optical signals as an example, four converging surfaces 550a1 are formed on the light incident end surface of the light folding element 560, and the four optical signals output by the light splitting component 590 are coupled into the four converging surfaces 550a1 respectively.

[0191] In some embodiments, the converging surface 550a1 is hidden inside the deflecting element 560 , that is, the end surface of the deflecting element 560 protrudes relative to the converging surface 550a1 , thereby effectively avoiding the problem of process contamination of the converging surface 550a1 .

[0192] Figure 16 Schematic diagram of the relative position relationship between the filter and the reflector in a spectrometer assembly according to some embodiments of the present disclosure. Figure 16 As shown, in some embodiments, the light splitting component 590 includes a filter array and a reflector array.

[0193] Taking the reception of four optical signals as an example, the optical splitter component 590 includes a first filter 591 , a second filter 593 , and a third filter 595 .

[0194] Taking the reception of four optical signals as an example, the optical splitter assembly 590 includes a first reflector 592 , a second reflector 594 , and a third reflector 596 .

[0195] The first filter 591 and the first reflector 592 form a first light splitting unit, the second filter 593 and the second reflector 594 form a second light splitting unit, and the third filter 595 and the third reflector 596 form a third light splitting unit.

[0196] In some embodiments, the filter element and the reflector element have a certain relative position relationship so that each split light reaches the surface of the corresponding light receiving chip.

[0197] In some embodiments, by adjusting the spacing between filters, the spacing between reflectors, the spacing between filters and reflectors, and the tilt angle, the optical signal transmission optical path spacing adjustment and wave splitting function can be achieved.

[0198] In some embodiments, assume that the inclination angle of the first filter 591, the second filter 593, and the third filter 595 relative to the surface of the substrate 510 is angle A, the angle between the incident light and the outgoing light of the first filter 591 is angle B, and the angle between the outgoing light of the first filter 591 and the light incident surface of the first filter 591 is angle C. According to geometric relationships, angle C is equal to angle A, so angle B = π-2A.

[0199] The lateral distance between the first reflector 592 and the second filter 593 is distance L, and the vertical distance between the first filter 591 and the second filter 593 is distance H. For example, distance H can be obtained based on the placement distance between the light receiving chips, that is, distance H is a known quantity.

[0200] 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, each split light can reach the corresponding light receiving chip surface.

[0201] In the present disclosure, the placement and angle adjustment of each filter component and reflector component in the spectrometer assembly can be applied to various types of products, and the versatility is strong.

[0202] In the present disclosure, by adjusting the placement and angle of each filter component 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.

[0203] Figure 17 An optical path of a light receiving component provided according to some embodiments of the present disclosure Figure 1 .like Figure 17 As shown, in some embodiments, a light splitting component 590 is provided between the fiber optic adapter 520 and the light refraction member 560 .

[0204] In some embodiments, the optical splitter component 590 includes a first filter 591 , a second filter 593 , and a third filter 595 .

[0205] In some embodiments, the light splitting component 590 includes a first reflective element 592 , a second reflective element 594 , and a third reflective element 596 .

[0206] In some embodiments, a light-transmitting portion 597 is disposed between the third reflective element 596 and the light-reflecting element 560 .

[0207] In some embodiments, the optical signal output by the optical fiber adapter 520 includes a first wavelength optical signal, a second wavelength optical signal, a third wavelength optical signal, and a fourth wavelength optical signal, thereby achieving reception of four optical signals.

[0208] The optical splitter 590 is configured to separate the first wavelength optical signal, the second wavelength optical signal, the third wavelength optical signal and the fourth wavelength optical signal respectively, so that each optical signal reaches the surface of the optical receiving chip respectively.

[0209] The optical signal output by the optical fiber adapter 520 is transmitted along the collimating lens 530 to the surface of the first filter element 591, wherein the first wavelength optical signal is transmitted through the first filter element 591, thereby decomposing the first wavelength optical signal and coupling the first wavelength optical signal to the first converging surface of the refractive element.

[0210] The second, third, and fourth wavelength optical signals are all reflected by the first filter 591 onto the surface of the first reflector 592. The first reflector 592 then reflects the second, third, and fourth wavelength optical signals toward the second filter 593. The second, third, and fourth wavelength optical signals all reach the surface of the second filter 593. Only the second wavelength optical signal is transmitted through the second filter 593, thereby separating the second wavelength optical signal and coupling it to the second converging surface of the deflector.

[0211] The third and fourth wavelength optical signals are reflected by the second filter 593 onto the surface of the second reflector 594. The second reflector 594 then reflects the third and fourth wavelength optical signals toward the third filter 595. The third and fourth wavelength optical signals then reach the surface of the third filter 595. Only the third wavelength optical signal is transmitted through the third filter 593, thereby separating the third wavelength optical signal and coupling it to the third converging surface of the deflector.

[0212] The fourth wavelength optical signal is reflected onto the surface of the third reflector 596 , which reflects the fourth wavelength optical signal toward the transparent portion 597 . The fourth wavelength optical signal passes through the transparent portion 597 and reaches the fourth converging surface of the refracting element, thus completing the splitting of the four optical signals.

[0213] Figure 18 An optical path of a light receiving component provided according to some embodiments of the present disclosure Figure 2 .like Figure 18 As shown, in some embodiments, a light splitting component 590 is provided between the fiber optic adapter 520 and the light refraction member 560 .

[0214] In some embodiments, the optical splitter component 590 includes a first filter 591 , a second filter 593 , and a third filter 595 .

[0215] In some embodiments, the light splitting component 590 includes a first reflective element 592 , a second reflective element 594 , and a third reflective element 596 .

[0216] In some embodiments, there is a relatively blank area between the third reflective element 596 and the refractive element 560 , and no light-transmitting portion is provided.

[0217] Figure 18 The spectroscopic principle shown is Figure 17 Same, no more details. Figure 18 The optical path shown in Figure 17 The difference between the light paths shown is that: Figure 17 As shown in FIG, no light-transmitting portion is provided between the third reflector 596 and the refracting element 560 , and the third reflector 596 reflects the fourth wavelength optical signal directly toward the fourth converging surface of the refracting element, and the fourth wavelength optical signal is directly coupled to the fourth converging surface of the refracting element.

[0218] The following embodiments are exemplified by taking an optical beam splitter as the optical demultiplexing component 540 .

[0219] The light receiving component 500 may include a lens group 550 . The lens group 550 is disposed on the light output path of the optical demultiplexing component 540 .

[0220] The lens group 550 includes various lenses, each corresponding to a light output channel of the optical demultiplexing assembly 540. Taking four-way receiving as an example, the lens group 550 includes four lenses, namely a first lens 551, a second lens 552, a third lens 553, and a fourth lens 554.

[0221] The light output path of the lens assembly 550 is parallel to the surface of the circuit board 300 .

[0222] The light receiving unit 500 may include a light receiving chip group including respective light receiving chips 570 .

[0223] The number of light output 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.

[0224] The light receiving direction of the light receiving chip is perpendicular to the surface of the circuit board 300 .

[0225] For example, the light receiving chip 570 may be a front-illuminated light receiving chip. A front-illuminated light receiving chip means that the photosensitive surface of the light receiving chip 570 faces upward, that is, the photosensitive surface is located on the top surface of the light receiving chip. The photosensitive surface is the functional surface for receiving light signals.

[0226] For example, the light receiving chip 570 may be a back-illuminated light receiving chip, which means that the photosensitive surface of the light receiving chip 570 faces downward, that is, the photosensitive surface is located on the bottom surface of the light receiving chip.

[0227] When the light receiving chip 570 is a front-illuminated light receiving chip, the surface where the photosensitive surface is located is the top surface of the chip. The surface where the photosensitive surface is located has a connection pad. The photosensitive surface and the connection pad are usually located on the same surface of the light receiving chip 570.

[0228] The connection pads on the top surface can be connected to the surface of the circuit board 300 by wire bonding, thereby achieving electrical connection between the light receiving chip 570 and the circuit board 300 .

[0229] When the photosensitive surface of the light receiving chip faces upward, the photosensitive surface is exposed to the air. In order to reduce the reflection of the light signal by the photosensitive surface and allow more light signals to be absorbed into the photosensitive surface, the surface of the photosensitive surface will be coated with an anti-reflection film. The refractive index of the anti-reflection film is greater than the refractive index of the air, so that more light signals can be transmitted into the photosensitive surface, ensuring the light receiving power.

[0230] When the light receiving chip 570 is a back-illuminated light receiving chip, the surface where the photosensitive surface is located is the bottom surface of the chip, thereby preventing the photosensitive surface from being exposed to air. In this case, the connection pads are located on the bottom surface of the chip, that is, the light receiving chip 570 is placed upside down on the surface of the circuit board 300.

[0231] The connection pads on the bottom surface of the light receiving chip 570 and the surface of the circuit board 300 can be connected through solder balls, thereby achieving electrical connection between the light receiving chip 570 and the circuit board 300 .

[0232] In order to transmit the optical signal to the photosensitive surface, a spherical lens is provided on the top surface of the light receiving chip to allow the optical signal to pass through and enter the light receiving chip 570 .

[0233] For example, a light-transmitting hole may be formed between the spherical lens and the photosensitive surface, so that the light signal sequentially travels along the spherical lens and the light-transmitting hole to reach the photosensitive surface, thereby achieving reception of the light signal.

[0234] The light receiving component 500 may include a deflecting member 560. The deflecting member 560 has a function of deflecting an optical path.

[0235] 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 deflecting element 560 is arranged between the light emitting path of the lens group 550 and the light incident path of the light receiving chip 570 .

[0236] The light signal outputted from the lens group 550 and parallel to the surface of the circuit board 300 can be transformed into a light signal perpendicular to the surface of the circuit board 300 by the light refraction element 560 , thereby realizing light path transformation.

[0237] In the present disclosure, the light receiving chip 570 is mounted in an array, which may result in a certain mounting tolerance.

[0238] In the present disclosure, there is a certain gap between each lens in the lens group 550, so that each lens is independently arranged. Compared with the lenses in the lens array, which are all composed of a 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 each an independent body.

[0239] The lenses in the lens group 550 are independently arranged, and each lens can be coupled separately.

[0240] When each lens is coupled individually, that is, a single lens is coupled at once, this coupling method is called single-lens coupling. Single-lens coupling can couple a single lens to the focal length of the corresponding optical receiver chip, thereby improving the coupling accuracy of each lens, effectively absorbing the mounting tolerance of the optical receiver chip, increasing optical tolerance, and improving optical coupling efficiency.

[0241] In the disclosed embodiment, the collimated light output by the optical demultiplexer assembly 540 is coupled to the focal length of the corresponding optical receiver chip. For example, the optical response current generated by each optical receiver chip can be monitored, and the setting angle of the optical demultiplexer assembly 540 can be adjusted to ensure that the collimated light output by the optical demultiplexer assembly 540 is coupled to the optimal position, thereby improving the coupling accuracy of the optical demultiplexer assembly 540. This can also absorb the mounting tolerance of the optical receiver chips, increase optical tolerance, and improve optical coupling efficiency and optical stability.

[0242] 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 substrate 510 via a bonding portion. For example, the bonding portion may be glue, which uses the viscosity of the glue to fix each lens to the surface of the substrate 510. For example, the bonding portion may also be solder, which exhibits a certain degree of fluidity during soldering.

[0243] In some embodiments, adjacent lenses are spaced relatively close together. For example, the space between adjacent lenses may be as little as 150 μm. Possible reasons for the reduced spacing between adjacent lenses include: To ensure sufficient light aperture, each lens is relatively wide, resulting in a smaller spacing between adjacent lenses in a limited space.

[0244] When the gap between adjacent lenses is small, the bonding parts such as glue that fix the adjacent lenses are easily connected together, resulting in glue bonding, which causes the lenses to shift in position and reduces the optical coupling efficiency.

[0245] Figure 19 FIG. 1 is a structural diagram of a substrate provided according to some embodiments of the present disclosure. Figure 19 As shown, in some embodiments, the substrate 510 is a special-shaped substrate. A groove 511 is formed on the surface of the substrate 510.

[0246] Based on the grooves 511 on the surface of the substrate 510 , grooves 511 are provided between adjacent lenses.

[0247] A groove 511 is defined between the first lens 551 and the second lens 552 , separating the first lens 551 and the second lens 552 .

[0248] A groove 511 is defined between the second lens 552 and the third lens 553 , separating the second lens 552 and the third lens 553 .

[0249] A groove 511 is defined between the third lens 553 and the fourth lens 554 , separating the third lens 553 and the fourth lens 554 .

[0250] A groove 511 is provided between adjacent lenses, so that the adhesive portion such as glue overflowing from the surrounding when fixing the lenses can be collected and stored through the groove 511, thereby preventing the glue fixing adjacent lenses from being connected together, that is, avoiding the glue-joining phenomenon.

[0251] In the present disclosure, the substrate 510 is a special-shaped substrate. A groove 511 is formed on the surface of the substrate 510. The special-shaped substrate design can effectively reduce the problem of lens glue connection and improve the manufacturability and disassembly of the product.

[0252] In the present disclosure, substrate 510 is a special-shaped substrate. A groove 511 is formed on the surface of substrate 510. The provision of groove 511 can increase the bonding area of ​​the optical element disposed on the surface of substrate 510, thereby effectively increasing the bonding strength and improving the stability of optical performance.

[0253] In the present disclosure, the grooves 511 provided on the surface of the substrate 510 can serve as a patch reference to improve the mounting accuracy of each optical element supported on the surface of the substrate 510, thereby improving the optical tolerance and coupling efficiency.

[0254] For example, the grooves 511 may be arranged at regular intervals on the surface of the substrate 510 .

[0255] For example, the groove 511 may be a V-shaped groove, a U-shaped groove, or other grooves that play a collecting role. The V-shaped groove, the U-shaped groove, etc. may be formed by etching the surface of the substrate 510.

[0256] The provision of the groove 511 can effectively reduce the problem of lens bonding, and can also increase the bonding strength of the optical element on the surface of the substrate 510. In addition, the groove 511 can be used as a patch reference to improve the patch accuracy.

[0257] Figure 20 Schematic diagram of a lens provided on a substrate surface according to some embodiments of the present disclosure. Figure 20As shown, 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 certain gap between adjacent lenses.

[0258] Each lens is fixed to the surface of the substrate 510 via a bonding portion 580. For example, the bonding portion can be glue.

[0259] The provision of the grooves 511 can effectively prevent adjacent bonding portions 580 from being connected together, thereby preventing the lens position from being offset, ensuring the stability of optical performance, and improving light coupling efficiency.

[0260] In some embodiments, the deflector 560 has a light path turning function, adjusting the optical 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 turning of the light path.

[0261] The light folding element 560 bends the optical path to the light receiving direction of the light receiving chip 570 , thereby transmitting the optical signal to the surface of the light receiving chip 570 to achieve reception of the optical signal.

[0262] In some embodiments, the deflector 560 may include an inclined surface facing the lens group 550 to reflect the optical signals output by each lens in the lens group 550 toward the optical receiving chip 570 , thereby redirecting the optical path to the light receiving direction of the optical receiving chip 570 .

[0263] In some embodiments, the angle between the inclined surface of the deflector 560 and the surface of the light receiving chip can be 45 degrees. When the light emitting surface of the deflector 560 is a horizontal plane, the light signal output by the deflector 560 can be vertically incident on the photosensitive surface of the light receiving core or the light hole of the spherical lens.

[0264] For example, when the light receiving chip is front-illuminated, the light signal output by the refracting element 560 is vertically incident on the photosensitive surface of the light receiving chip; when the light receiving chip is back-illuminated, the light signal output by the refracting element 560 is vertically incident on the light hole of the light receiving chip.

[0265] When light is incident on the photosensitive surface or spherical lens, part of the light will be reflected by the photosensitive surface or spherical lens. Since the angle between the reflecting surface and the surface of the light receiving chip is 45°, this reflected part of the light will return along the original path, resulting in large return loss and reducing the quality of the optical receiving signal.

[0266] In some embodiments, the angle between the inclined surface of the deflector 560 and the surface of the light receiving chip can be 42 degrees. When the light-emitting surface of the deflector 560 is a horizontal plane, the light signal output by the deflector 560 can be incident at an angle onto the photosensitive surface of the light receiving chip or the light aperture of the spherical lens.

[0267] As the speed of the optical module increases, the aperture of the photosensitive surface of the optical receiver chip or the spherical lens decreases, and the size of the photosensitive surface or the aperture is relatively limited. When the optical signal is incident at an angle on the photosensitive surface or the aperture on the top surface of the optical receiver chip, some light is blocked and cannot pass through the photosensitive surface or the aperture, thereby reducing the optical coupling efficiency.

[0268] Since the light is incident on the photosensitive surface or the light hole at an angle, the light reflected by the photosensitive surface or the spherical lens is emitted obliquely into the air, so that no return loss is generated and the impact on the optical signal quality is small.

[0269] In the present disclosure, the refractive element may include at least two inclined surfaces. Each inclined surface exhibits different optical properties to the optical signal. For example, one inclined surface reflects the optical signal, thereby bending the optical path toward the optical receiving chip; the other inclined surface refracts the optical signal, further adjusting the optical path to be perpendicular to the surface of the optical receiving chip to accommodate the limited area of ​​the photosensor surface or the clear aperture of the spherical lens, thereby coupling more optical signals to the photosensor surface or within the clear aperture.

[0270] In some embodiments, the deflector may include two inclined surfaces.

[0271] The first inclined surface is arranged obliquely relative to the surface of the light receiving chip. The first inclined surface is configured to turn the optical signal transmission path toward the light receiving chip. The optical signal output by the first inclined surface is transmitted in a direction that is not perpendicular to the interface at which the optical signal arrives.

[0272] The other inclined surface is arranged toward the upper inclined surface and is tilted relative to the surface of the light receiving chip and is located on the output light path of the upper inclined surface. The inclined surface is configured to adjust the optical signal transmission path so that the optical signal is vertically incident on the inner surface of the light receiving chip.

[0273] The two inclined surfaces work together to ensure that the optical signal output by the refractive element is perpendicularly incident on the photosensitive surface or aperture of the optical receiver chip 570, thereby preventing light blocking and ensuring optical coupling efficiency. Furthermore, a portion of the light reflected by the photosensitive surface or spherical lens is reflected back into the air by the inclined surface, thereby reducing return loss and minimizing the impact on the quality of the optical reception signal.

[0274] Figure 21 This is a structural diagram of a light receiving component provided according to some embodiments of the present disclosure. Figure 21 The structure of the deflecting member 560a is shown in FIG. Figure 13 As shown, in some embodiments, the deflecting element 560a includes two inclined surfaces, namely: a first inclined surface 564a and a second inclined surface 565a.

[0275] The second inclined surface 565 a is the interface to which the light signal output from the first inclined surface 564 a reaches.

[0276] The second inclined surface 565a is the light emitting surface of the light refraction element 560a.

[0277] Figure 22 This is a structural diagram of another light receiving component provided according to some embodiments of the present disclosure. Figure 22 The structure of the refraction member 560b is shown in FIG. Figure 14 As shown, in some embodiments, the deflecting element 560b includes two inclined surfaces, namely: a first inclined surface 562b and a second inclined surface 563b.

[0278] The second inclined surface 563b is the interface to which the optical signal outputted from the first inclined surface 562b reaches.

[0279] Figure 23 This is a structural diagram of another light receiving component provided according to some embodiments of the present disclosure. Figure 23 The structure of the refraction member 560c is shown in FIG. Figure 15 As shown, in some embodiments, the deflecting element 560c includes two inclined surfaces, namely: a first inclined surface 562c and a second inclined surface 564c.

[0280] A first connecting surface 563 c is defined between the first inclined surface 562 c and the second inclined surface 564 c , and a second connecting surface 565 c is defined between the second inclined surface 564 c and the light incident surface 561 c .

[0281] The first connecting surface 563 c is the interface to which the optical signal outputted from the first inclined surface 562 c arrives.

[0282] The second connecting surface 565c is the light emitting surface of the light refraction element 560c.

[0283] Figure 24 FIG. 1 is a structural diagram of a refractive element provided according to some embodiments of the present disclosure. Figure 24 As shown, in some embodiments, a deflecting member 560a is provided.

[0284] The light deflecting member 560a may include a top surface 561a.

[0285] The deflecting member 560a may include a bottom surface 562a. The bottom surface 562a and the top surface 561a are located on two opposite surfaces. The bottom surface 562a is fixed to the surface of the substrate 510, thereby fixing the deflecting member 560a to the surface of the substrate 510.

[0286] The light-refraction member 560a may include a light-incident surface 563a. The light-incident surface 563a is disposed between the top surface 561a and the bottom surface 562a. The light-incident surface 563a is disposed toward the lens group 550 to receive the optical signal output by the lens group 550.

[0287] The light-reflecting element 560a may include a first inclined surface 564a. The first inclined surface 564a is disposed toward the light incident surface 563a to receive the optical signal outputted by the light incident surface. The first inclined surface 564a exhibits a reflective property for the optical signal transmitted from the light incident surface 563a.

[0288] In some embodiments, the first inclined surface 564 a is inclined relative to the surface of the light receiving chip 570 .

[0289] First inclined surface 564a is configured to reflect the optical signal output by lens assembly 550 toward the direction of the optical receiving chip. By reflecting the optical signal, the optical path is redirected: the optical path is adjusted from being parallel to the surface of circuit board 300 to being perpendicular to the surface of circuit board 300, thereby redirecting the optical signal toward the optical receiving chip.

[0290] The deflecting element 560a may include a second inclined surface 565a. The second inclined surface 565a is located below the first inclined surface 564a to receive the optical signal output by the first inclined surface 564a. The second inclined surface 565a is the interface to which the optical signal output by the first inclined surface 564a reaches.

[0291] The second inclined surface 565 a is configured as the light-emitting surface of the light-reflecting element 560 a , and the optical signal finally output by the light-reflecting element 560 a is emitted along the surface of the second inclined surface 565 a .

[0292] In some embodiments, the second inclined surface 565 a is inclined relative to the surface of the light receiving chip 570 .

[0293] When the optical signal output by the first inclined surface 564a is incident on the second inclined surface 565a along a direction non-perpendicular to the second inclined surface 565a, the optical signal output by the second inclined surface 565a is expected to be incident perpendicularly to the surface of the light receiving chip.

[0294] It is understood that if the optical signal output by the first bevel 564a is incident perpendicularly on the second bevel 565a, the optical signal output by the second bevel 565a cannot be incident perpendicularly on the surface of the optical receiving chip, but instead is incident at an angle relative to the surface of the optical receiving chip. In this case, light will be blocked by the photosensitive surface of the front-illuminated optical receiving chip or the light hole of the back-illuminated optical receiving chip, reducing the optical coupling efficiency. However, this will reduce return loss and mitigate the impact on the quality of the optical receiving signal. Therefore, if the light blocking issue can be tolerated, it is not necessary to limit the optical signal output by the second bevel 565a to being incident perpendicularly on the surface of the optical receiving chip.

[0295] The embodiments of the present disclosure are intended to solve the problem of light being blocked by the photosensitive surface or the light aperture. Therefore, the design purpose of the present disclosure is to make the optical signal output by the second inclined surface 565a vertically incident on the surface of the light receiving chip, and then adapt to the limited photosensitive surface area or the light aperture of the spherical lens, so as to strive to couple more optical signals to the photosensitive surface or the light aperture, thereby avoiding light blocking and improving the coupling efficiency of light incident on the surface of the light receiving chip.

[0296] In some embodiments, the first inclined surface 564a is configured such that the optical signal output by the first inclined surface 564a is incident on the second inclined surface 565a in a direction non-perpendicular to the second inclined surface 565a. In other words, the optical signal output by the first inclined surface 564a is incident on the second inclined surface 565a in a non-perpendicular direction. Similar descriptions below may refer to the explanations herein.

[0297] The optical signal output from the first inclined surface 564a is not vertically incident on the second inclined surface 565a, so the angle between the incident light and the outgoing light of the first inclined surface 564a is not a right angle.

[0298] In some embodiments, the second inclined surface 565 a is configured to adjust the optical signal transmission path so that the optical signal is vertically incident on the surface of the light receiving chip.

[0299] 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 optical signal ultimately output by the second inclined surface 565a can be perpendicularly incident on the surface of the light receiving chip.

[0300] In some embodiments, in order to achieve the optical signal output by the second bevel 565a being vertically incident on the surface of the light receiving chip, the optical signal output by the first bevel 564a is non-vertically incident on the second bevel 563b, and it should also meet the following requirements: the first angle A should be an angle other than 45°, so that the optical signal output by the first bevel 564a is transmitted to the second bevel 565a along a direction non-perpendicular to the surface of the light receiving chip.

[0301] It can be understood that, based on the law of refraction, the optical signal output by the first bevel 564a is non-vertically incident on the second bevel 565a, and at the same time, the optical signal output by the second bevel 565a is vertically incident on the surface of the optical receiving chip. In this way, the situation in which the optical signal output by the first bevel 564a is transmitted to the second bevel 565a in a direction perpendicular to the surface of the optical receiving chip has been eliminated, that is, the situation in which the first angle is 45° has been eliminated.

[0302] The deflecting member 560a may include a connecting surface 566a. For ease of processing, the connecting surface 566a is formed between the first inclined surface 564a and the second inclined surface 565a. The provision of the connecting surface 566a does not affect the optical path. Of course, the first inclined surface 564a and the second inclined surface 565a may also be directly connected.

[0303] For the deflecting element 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.

[0304] In the deflecting element 560a, the optical signal is reflected once at the first inclined surface 564a and refracted once at the second inclined surface 565a. The optical path is bent by reflection, and the bent optical path is adjusted by refraction so that the optical signal ultimately output by the deflecting element 560a is perpendicularly incident on the surface of the light receiving chip, adapting to the limited photosensitive surface area or the clear aperture of the spherical lens.

[0305] For the deflector 560a, since the position of the light receiving chip is fixed, the inclination of the first inclined surface 564a is fixed, thereby deflecting the light path toward the light receiving chip. The inclination of the second inclined surface 565a is arranged opposite the inclination of the first inclined surface 564a. For example, the end surface of the second inclined surface 565a closer to the first inclined surface 564a is higher than the end surface farther from the first inclined surface 564a.

[0306] Figure 25 Another structure of a refractive element provided according to some embodiments of the present disclosure is Figure 1 ; Figure 26 Another structure of a refractive element provided according to some embodiments of the present disclosure is Figure 2 .like Figure 25 and Figure 26 As shown, in some embodiments, a deflecting member 560b is provided.

[0307] In some embodiments, the light-refraction element 560 b may include a light-incident surface 561 b , which is disposed toward the lens group 550 to receive the optical signal output by the lens group 550 .

[0308] For example, the light incident surface 561b may be perpendicular to the surface of the light receiving chip. In this case, the light signal is incident on the light incident surface 561b in a horizontal direction and is transmitted from the light incident surface 561b in a horizontal direction.

[0309] When the light incident surface 561b is not perpendicular to the surface of the light receiving chip, the refractive index requirement for the light folding element 560b is relatively high.

[0310] For example, the light incident surface 561b may be an inclined surface. In this case, the light signal is incident on the light incident surface 561b in a horizontal direction, is refracted at the light incident surface 561b, and is transmitted from the light incident surface 561b in an inclined direction.

[0311] In some embodiments, the light incident surface 561 b is an inclined surface, so as to increase the stability of the light refraction element 560 b through the light incident surface 561 b.

[0312] In some embodiments, the light deflecting member 560b may include a first inclined surface 562b disposed toward the light incident surface 561b to receive the optical signal outputted by the light incident surface 561b.

[0313] In some embodiments, the first inclined surface 562b is inclined relative to the surface of the light receiving chip 570. The first inclined surface 562b reflects the light signal. This reflection of the light signal redirects the light path: the light path is adjusted from being parallel to the surface of the circuit board 300 to being perpendicular to the surface of the circuit board 300, thereby redirecting the light signal toward the light receiving chip.

[0314] In some embodiments, the deflecting member 560b may include a second inclined surface 563b located below the first inclined surface 562b to receive the optical signal output by the first inclined surface 562b. The second inclined surface 563b is the interface to which the optical signal output by the first inclined surface 562b reaches.

[0315] The second inclined surface 563 b is configured as the light-emitting surface of the light-reflecting element 560 b , and the optical signal finally output by the light-reflecting element 560 b is emitted along the surface of the second inclined surface 563 b .

[0316] In some embodiments, the second inclined surface 563 b is disposed obliquely relative to the surface of the light receiving chip 570 .

[0317] When the optical signal output by the first inclined surface 562b is incident on the second inclined surface 563b along a direction non-perpendicular to the second inclined surface 563b, the optical signal output by the second inclined surface 563b is expected to be incident perpendicularly to the surface of the light receiving chip.

[0318] In the embodiment of the present disclosure, the problem of light being blocked by the photosensitive surface or the light hole is solved. Therefore, the design purpose of the present disclosure is to make the optical signal output by the second inclined surface 563b vertically incident on the surface of the light receiving chip.

[0319] In some embodiments, the first inclined surface 562b is configured as follows: the optical signal output by the first inclined surface 562b is incident on the second inclined surface 563b along a direction non-perpendicular to the second inclined surface 563b, in short: the optical signal output by the first inclined surface 562b is non-perpendicularly incident on the second inclined surface 563b.

[0320] The optical signal outputted from the first inclined surface 562b is not vertically incident on the second inclined surface 563b, so the angle between the incident light and the outgoing light of the first inclined surface 562b is not a right angle.

[0321] In some embodiments, the second inclined surface 563 b is configured to adjust the optical signal transmission path so that the optical signal is vertically incident on the surface of the light receiving chip.

[0322] 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 predetermined relationship, the optical signal ultimately output by the second inclined surface 563b can be perpendicularly incident on the surface of the light receiving chip, thereby solving the light blocking problem and improving optical coupling efficiency.

[0323] In some embodiments, in order to achieve the optical signal output by the second bevel 563b being vertically incident on the surface of the light receiving chip, the optical signal output by the first bevel 562b is non-vertically incident on the second bevel 563b, and it should also meet the following requirements: the first angle A should be an angle other than 45°, so that the optical signal output by the first bevel 562b is transmitted to the second bevel 563b in a direction that is not perpendicular to the surface of the light receiving chip.

[0324] It can be understood that the optical signal output by the first bevel 562b is not vertically incident on the second bevel 563b, and the optical signal output by the second bevel 563b is vertically incident on the surface of the optical receiving chip. In this way, the situation in which the optical signal output by the first bevel 562b is transmitted to the second bevel 563b in a direction perpendicular to the surface of the optical receiving chip has been eliminated, that is, the situation in which the first angle is 45° has been eliminated.

[0325] In some embodiments, the deflecting member 560 b may include a bottom surface 564 b , which is fixed to the surface of the substrate 510 , thereby fixing the deflecting member 560 b to the surface of the substrate 510 .

[0326] In some embodiments, the first inclined surface 562b and the second inclined surface 563b may be directly connected together, or a connecting surface may be formed therebetween.

[0327] For the deflecting element 560b, 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.

[0328] In the deflecting element 560b, the optical signal is reflected once at the first inclined surface 562b and refracted once at the second inclined surface 563b. The optical path is bent by reflection, and the bent optical path is adjusted by refraction so that the optical signal ultimately output by the deflecting element 560b is perpendicularly incident on the surface of the light receiving chip, adapting to the limited photosensitive surface area or the clear aperture of the spherical lens.

[0329] For the deflector 560b, since the position of the light receiving chip is fixed, the inclination of the first inclined surface 562b is fixed, thereby deflecting the light path toward the light receiving chip. The inclination of the second inclined surface 563b is arranged in the same direction as the inclination of the first inclined surface 562b. The inclination here does not strictly mean parallel, but rather that the inclination is in the same direction. For example, the end surface of the second inclined surface 563b closer to the first inclined surface 562b is lower than the end surface farther away from the first inclined surface 562b.

[0330] Figure 27 A structure of another refractive element provided according to some embodiments of the present disclosure is Figure 1 ; Figure 28 A structure of another refractive element provided according to some embodiments of the present disclosure is Figure 2 .like Figure 27 and Figure 28 As shown, in some embodiments, a deflecting member 560c is provided.

[0331] In some embodiments, the light-refraction element 560 c may include a light-incident surface 561 c , and the light-incident surface 561 b is disposed toward the lens group 550 to receive the optical signal output by the lens group 550 .

[0332] In some embodiments, the light deflecting member 560c may include a first inclined surface 562c disposed toward the light incident surface 561c to receive the optical signal outputted by the light incident surface 561c.

[0333] In some embodiments, the first inclined surface 562c is inclined relative to the surface of the light receiving chip 570. The first inclined surface 562c is configured as a functional surface for turning the optical path. The first inclined surface 562c reflects the optical signal output from the light incident surface 561c. The optical signal output from the first inclined surface 562c is transmitted in a direction that is not perpendicular to the interface at which the optical signal reaches.

[0334] In some embodiments, the deflecting element 560c may include a first connecting surface 563c. The first connecting surface 563c is connected to the first inclined surface 562c to receive the optical signal output by the first inclined surface 562c. As can be seen, the first connecting surface 563c is the interface at which the optical signal output by the first inclined surface 562c arrives. Therefore, the optical signal output by the first inclined surface 562c is incident on the first connecting surface 563c along a direction non-perpendicular to the first connecting surface 563c.

[0335] In some embodiments, the optical signal output by the first inclined surface 562c is incident on the first connecting surface 563c along a direction non-perpendicular to the first connecting surface 563c, and the angle between the incident light and the outgoing light of the first inclined surface 562c is non-right angle.

[0336] Exemplarily, the first connecting surface 563c is set as a horizontal surface, and can also be set as an inclined surface. The following embodiment is exemplified by taking the first connecting surface 563c as a horizontal surface.

[0337] The optical signal is refracted once at the first connection surface 563 c , and the refracted optical signal is transmitted along a direction that is not perpendicular to the interface at which the optical signal output from the first connection surface 563 c reaches.

[0338] In some embodiments, the refractive element 560c may include a second inclined surface 564c. The second inclined surface 564c is configured as a functional surface for adjusting the optical path. The second inclined surface 564c is connected to the first connecting surface 563c. That is, the first connecting surface 563c is provided between the first inclined surface 562c and the second inclined surface 564c to connect the first inclined surface 562c and the second inclined surface 564c. The second inclined surface 564c receives the optical signal output by the first connecting surface 563c. The second inclined surface 564c is the interface at which the optical signal output by the first connecting surface 563c reaches. The optical signal output by the first connecting surface 563c is then transmitted in a direction non-perpendicular to the second inclined surface 564c. The optical signal that reaches the second inclined surface 564c is refracted again at the second inclined surface 564c, and the refracted optical signal is transmitted in a direction perpendicular to the interface at which the optical signal output by the second inclined surface 564c reaches.

[0339] In some embodiments, the deflecting member 560c may include a second connecting surface 565c. The second connecting surface 565c is connected to the second inclined surface 564c. The second connecting surface 565c serves as a fixing surface, securing the deflecting member 560c to the surface of the substrate 510. The second connecting surface 565c also serves as a light emitting surface, and the optical signal output from the second connecting surface 565c is transmitted to the surface of the light receiving chip.

[0340] In some embodiments, the second connecting surface 565c is set as a horizontal surface. In some embodiments, it can also be set as an inclined surface. The following embodiments are exemplified by taking the second connecting surface 565c as a horizontal surface.

[0341] In some embodiments, the second connecting surface 565c receives the optical signal output by the second inclined surface 564c, and the second connecting surface 565c is the interface where the optical signal output by the second inclined surface 564c reaches, and the optical signal output by the second inclined surface 564c is transmitted along a direction perpendicular to the second connecting surface 565c.

[0342] In some embodiments, when the second connecting surface 565c is horizontal, if the optical signal is to be incident perpendicularly along the second connecting surface 565c onto the surface of the light receiving chip, the optical signal output from the second inclined surface 564c should be incident perpendicularly onto the second connecting surface 565c. If the optical signal output from the second inclined surface 564c is to be incident perpendicularly onto the second connecting surface 565c, the optical signal output from the first connecting surface 563c should be incident non-perpendicularly onto the second inclined surface 564c. If the optical signal output from the first connecting surface 563c is to be incident non-perpendicularly onto the second inclined surface 564c, the optical signal output from the first inclined surface 562c should be incident non-perpendicularly onto the first connecting surface 563c.

[0343] In some embodiments, the optical signal output by the first inclined surface 562 c is transmitted along a direction non-perpendicular to the first connecting surface 563 c , and is thus non-perpendicularly incident on the first connecting surface 563 c .

[0344] In some embodiments, the optical signal output from the first connecting surface 563 c is transmitted along a direction non-perpendicular to the second inclined surface 564 c , and is thus non-perpendicularly incident on the second inclined surface 564 c .

[0345] In some embodiments, the optical signal output by the second inclined surface 564 c is transmitted in a direction perpendicular to the second connecting surface 565 c , and is thus perpendicularly incident on the second connecting surface 565 c .

[0346] In some embodiments, the optical signal output by the second connection surface 565 c is transmitted along a surface perpendicular to the light receiving chip.

[0347] In the embodiment of the present disclosure, the refractive element 560c is configured as follows: the first inclined surface 562c outputs an optical signal that is non-vertically incident on the first connecting surface 563c, the optical signal output by the first connecting surface 563c is non-vertically incident on the second inclined surface 564c, the optical signal output by the second inclined surface 564c is vertically incident on the second connecting surface 565c, and the optical signal output by the second connecting surface 565c is vertically incident on the surface of the optical receiving chip.

[0348] In the disclosed embodiment, 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 the first angle A and the second angle B satisfy a predetermined relationship, the optical signal ultimately output by the second connecting surface 565c can be perpendicularly incident on the surface of the light receiving chip, thereby resolving the light blocking problem and improving optical coupling efficiency.

[0349] For example, the first angle A is not 45°. The reason for this can be seen in the explanation of the first angle A not being 45° in the deflecting member 560a and the deflecting member 560b.

[0350] In the deflecting element 560c, the optical signal is reflected once at the first inclined surface 562c to achieve a deflection in the optical path. The optical signal is refracted once at the first connecting surface 563c to adjust the optical path. The optical signal is refracted again at the second inclined surface 564c to further adjust the optical path so that the optical signal ultimately output by the deflecting element 560c is perpendicularly incident on the surface of the light receiving chip.

[0351] Compared with the deflecting elements 560a and 560b, the deflecting element 560c has more optical path adjustments. Therefore, the deflecting element 560c can more easily couple out the optical signal vertically incident on the optical receiving chip, and the optical path adjustment accuracy and coupling accuracy are more accurate.

[0352] Compared to the deflecting elements 560 a and 560 b , the bottom surface of the deflecting element 560 c is flatter, and thus more stable when fixed to the surface of the substrate 510 .

[0353] Compared to the deflecting members 560a and 560b, the connecting surface between the first inclined surface 562c and the second inclined surface 564c in the deflecting member 560c, i.e., the first connecting surface 563c, is a relatively horizontal surface, while the connecting surface between the two inclined surfaces in the deflecting members 560a and 560b is a relatively vertical surface.

[0354] For the deflector 560c, since the position of the light receiving chip is fixed, the inclination of the first inclined surface 562b is fixed to bend the light path toward the direction of the light receiving chip. The inclination of the second inclined surface 563b is set in the same direction as the inclination of the first inclined surface 562b, that is, they have the same inclination trend.

[0355] Figure 29 The figure is a schematic diagram of an optical path corresponding to a refractive element provided according to some embodiments of the present disclosure. Figure 29 FIG. 5 is a schematic diagram showing the optical path principle of the refracting element 560 a .

[0356] like Figure 29 As shown, the optical signal is output from the lens group 550 and incident on the first inclined surface 564a, and is reflected by the first inclined surface 564a to the second inclined surface 565a. The reflected optical signal is non-vertically incident on the second inclined surface 565a.

[0357] After being refracted by the second inclined surface 565 a , the optical signal is vertically incident on the surface of the optical receiving chip, thereby avoiding the light blocking problem and ensuring the coupling efficiency of the optical signal incident on the optical receiving chip.

[0358] A portion of the light signal incident on the light receiving chip is transmitted into the interior, while a portion of the light signal is reflected by the photosensitive surface or the spherical lens, and the reflected light signal returns vertically to the second inclined surface 565a.

[0359] A portion of the optical signal returning to the second inclined surface 565 a is reflected into the air, thereby reducing the power of the optical signal returning along the original path, reducing the return loss, and thus reducing the impact on the quality of the optical reception signal.

[0360] 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 meet a predetermined relationship, the optical signal ultimately output by the second inclined surface 565a can be perpendicularly incident on the surface of the light receiving chip.

[0361] Exemplarily, the first angle A is an angle other than 45°, so that the optical signal output from the first inclined surface 564a is not vertically incident on the second inclined surface 565a.

[0362] For the deflector 560a, the first inclined surface 564a is a light path turning surface, which makes a large turn in the light path transmission direction. The second inclined surface 565a is a light path adjustment surface, which further adjusts the light path after the turn so that the light signal can be perpendicularly incident on the surface of the light receiving chip.

[0363] Figure 30 A schematic diagram of an optical path corresponding to another refracting element provided according to some embodiments of the present disclosure. Figure 30 The figure shows the principle of the optical path of the refracting element 560b.

[0364] like Figure 30 As shown, the light signal is output from the lens group 550 and incident on the first inclined surface 562b, and is reflected by the first inclined surface 562b to the second inclined surface 563b. The reflected light signal is incident on the second inclined surface 563b non-vertically.

[0365] After being refracted by the second inclined surface 563 b , the optical signal is vertically incident on the surface of the optical receiving chip, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the optical signal incident on the optical receiving chip.

[0366] A portion of the light signal incident on the light receiving chip is transmitted into the interior, and a portion of the light signal is reflected by the photosensitive surface or the spherical lens. The reflected light signal returns vertically to the second inclined surface 563b.

[0367] A portion of the optical signal returning to the second inclined surface 563 b is reflected into the air, thereby reducing the power of the optical signal returning along the original path, reducing the return loss, and thus reducing the impact on the quality of the optical reception signal.

[0368] 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 meet a predetermined relationship, the optical signal ultimately output by the second inclined surface 563b can be perpendicularly incident on the surface of the light receiving chip.

[0369] Exemplarily, the first angle A is not 45°, so that the optical signal output by the second inclined surface 563b is not vertically incident on the second inclined surface 565a, so that the optical signal output by the second inclined surface 563b can be vertically incident on the surface of the light receiving chip.

[0370] For the deflector 560b, the first inclined surface 562b is a light path turning surface, which makes a large turn in the light path transmission direction. The second inclined surface 563b is a light path adjustment surface, which further adjusts the light path after the turn so that the light signal can be perpendicularly incident on the surface of the light receiving chip.

[0371] The difference between the deflecting member 560a and the deflecting member 560b is that the first inclined surface 564a and the second inclined surface 565a of the deflecting member 560a are inclined in opposite directions, while the first inclined surface 562b and the second inclined surface 563b of the deflecting member 560b are inclined in the same direction.

[0372] Figure 31 This is a schematic diagram of the optical path corresponding to another refractive element provided according to some embodiments of the present disclosure. Figure 31 FIG. 5 is a schematic diagram showing the optical path principle of the refracting element 560 c .

[0373] like Figure 31 As shown, 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-vertically incident on the first connecting surface 563c, the optical signal output by the first connecting surface 563c is non-vertically incident on the second inclined surface 564c, and the optical signal output by the second inclined surface 564c is vertically incident on the second connecting surface 565c, and then the optical signal finally output by the second connecting surface 565c is vertically incident on the surface of the optical receiving chip to adapt to the limited photosensitive surface area or the clear aperture of the spherical lens, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the optical signal incident on the optical receiving chip.

[0374] A portion of the light signal incident on the light receiving chip is transmitted into the interior, while a portion of the light signal is reflected by the photosensitive surface or the spherical lens, and the reflected light signal returns vertically to the second inclined surface 564c.

[0375] Part of the optical signal returning to the second inclined surface 564c is reflected by the second inclined surface 564c and diffusely reflected inside the refracting element 560c, reducing the power of the optical signal returning along the original path and lowering the return loss; part of the optical signal is refracted along the original path and returned to the first connecting surface 563c.

[0376] The optical signal returned to the first connection surface 563c is incident on the first connection surface 563c at an angle, and part of the optical signal is reflected into the air by the first connection surface 563c, further reducing the return loss and the impact on the quality of the optical receiving signal.

[0377] The refracting element 560 c has a lower return loss rate than the refracting element 560 a and the refracting element 560 b , and has less impact on the quality of the optical receiving signal.

[0378] Figure 32 Schematic diagram of the optical path corresponding to a light receiving component provided according to some embodiments of the present disclosure. Figure 32 As shown, the substrate 510 has a supporting function.

[0379] The external optical signal is received by the optical fiber adapter 520 , and then the optical signal is collimated by the collimating lens 530 and enters the optical demultiplexing component 540 in the form of collimated light.

[0380] The collimated light is decomposed into multiple optical signals by the optical demultiplexing component 540. The multiple optical signals are respectively incident on corresponding lenses in the lens group 550.

[0381] The optical signal output from the lens group 550 is incident on the deflecting element 560a, and is reflected by the first inclined surface 564a of the deflecting element 560a to the second inclined surface 565a. The reflected optical signal is non-perpendicularly incident on the second inclined surface 565a.

[0382] After being refracted by the second inclined surface 565a in the light-bending element 560a, the optical signal is vertically incident on the surface of the optical receiving chip, thereby avoiding the light blocking problem and ensuring the coupling efficiency of the optical signal incident on the optical receiving chip.

[0383] Figure 33 FIG. 1 is a schematic diagram of an optical path corresponding to another optical receiving component provided according to some embodiments of the present disclosure. Figure 33 As shown, the substrate 510 has a supporting function.

[0384] The external optical signal is received by the optical fiber adapter 520 , and then the optical signal is collimated by the collimating lens 530 and enters the optical demultiplexing component 540 in the form of collimated light.

[0385] The collimated light is decomposed into multiple optical signals by the optical demultiplexing component 540. The multiple optical signals are respectively incident on corresponding lenses in the lens group 550.

[0386] The optical signal output from the lens group 550 is incident on the deflecting element 560b, and is reflected by the first inclined surface 562b of the deflecting element 560b to the second inclined surface 563b. The reflected optical signal is non-perpendicularly incident on the second inclined surface 563b.

[0387] After being refracted by the second inclined surface 563b in the refractive element 560b, the optical signal is vertically incident on the surface of the optical receiving chip to adapt to the limited photosensitive surface area or the aperture of the spherical lens, thereby avoiding the light blocking problem and ensuring the coupling efficiency of the optical signal incident on the optical receiving chip.

[0388] Figure 34 FIG. 1 is a schematic diagram of a light path corresponding to another light receiving component provided according to some embodiments of the present disclosure. Figure 34 As shown, the substrate 510 has a supporting function.

[0389] The external optical signal is received by the optical fiber adapter 520 , and then the optical signal is collimated by the collimating lens 530 and enters the optical demultiplexing component 540 in the form of collimated light.

[0390] The collimated light is decomposed into multiple optical signals by the optical demultiplexing component 540. The multiple optical signals are respectively incident on corresponding lenses in the lens group 550.

[0391] The optical signal output from the lens group 550 is incident on the light-bending element 560 c .

[0392] The optical signal is incident on the first inclined surface 562c in the refractive element 560c, and then the optical signal output by the first inclined surface 562c is non-vertically incident on the first connecting surface 563c, and the optical signal output by the first connecting surface 563c is non-vertically incident on the second inclined surface 564c, and the optical signal output by the second inclined surface 564c is vertically incident on the second connecting surface 565c, and then the optical signal finally output by the second connecting surface 565c is vertically incident on the surface of the optical receiving chip, thereby avoiding the problem of light blocking and ensuring the coupling efficiency of the optical signal incident on the optical receiving chip.

[0393] Figure 35 Schematic diagram of angle derivation corresponding to a refractive element provided according to some embodiments of the present disclosure. Figure 35 As shown, in the deflecting element 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.

[0394] In some embodiments, the refractive index of the refraction element 560a is n.

[0395] In some embodiments, the first angle A and the second angle B have a predetermined relationship such that the light ultimately output by the deflecting element 560a is perpendicularly incident on the surface of the light receiving chip. The relationship between the two is derived based on the assumption that the light output by the second inclined surface 565a is perpendicularly incident on the surface of the light receiving chip.

[0396] The angle between the reflected light reflected by the first inclined surface 564 a inside the refracting element 560 a and the first inclined surface 564 a is an angle M, and the angle between the reflected light and the horizontal plane is an angle N.

[0397] Based on geometric relationships, we can deduce that the angle between the normal of second inclined surface 565a and the horizontal plane is equal to angle B. Based on the law of reflection and geometric relationships, we can deduce that angle M = A and angle N = π - 2A. Therefore, the incident angle α of the light incident on second inclined surface 565a = π - B - (π - 2A) = 2A - B.

[0398] According to the deduction of geometric relationship, it can be known that the refraction angle of the light incident on the second inclined surface 565a = B.

[0399] According to the law of refraction, when n·sin(2A-B)=sinB, the light finally output by the refracting element 560a is vertically incident on the surface of the light receiving chip.

[0400] According to the above description, the first angle A is not 45°. Based on this, the angle M is not 45°, and thus the exit angle of the first inclined surface 564a is not 45°, and thus the incident angle of the first inclined surface 564a is not 45°, which also confirms that the angle between the incident light and the exit light of the first inclined surface 564a is not a right angle.

[0401] Figure 36 Schematic diagram of angle derivation corresponding to another refractive element provided according to some embodiments of the present disclosure. Figure 36 As shown, in the folding element 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.

[0402] In some embodiments, the refractive index of the refraction element 560b is n.

[0403] In some embodiments, there is a preset relationship between the first angle A and the second angle B, so that the light ultimately output by the light-bending element 560 b is vertically incident on the surface of the light-receiving chip.

[0404] For the convenience of deduction, a line parallel to the second inclined surface 563b is drawn at the first inclined surface 562b as an auxiliary line.

[0405] The angle between the reflected light of the first inclined surface 562 b and the first inclined surface 562 b is angle M. The angle between the normal line of the second inclined surface 563 b and the surface of the light receiving chip is angle N.

[0406] According to the geometric relationship, the angle M = A, the angle The angle

[0407] Then the incident angle of the light incident on the second inclined surface 563b is

[0408] According to the deduction of geometric relationship, it can be known that the refraction angle of the light incident on the second inclined surface 563b = B.

[0409] According to the law of refraction, n·sin(π 2 -2A+B)=sinB, the light finally output by the refracting element 560 b is vertically incident on the surface of the light receiving chip.

[0410] According to the above description, the first angle A is not 45°. Based on this, the angle M is not 45°, and thus the exit angle of the first inclined surface 562b is not 45°, and thus the incident angle of the first inclined surface 562b is not 45°, which also confirms that the angle between the incident light and the exit light of the first inclined surface 562b is not a right angle.

[0411] Figure 37 FIG. 1 is a schematic diagram of angle derivation corresponding to another refractive element provided according to some embodiments of the present disclosure. Figure 37 As shown, in the deflecting element 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.

[0412] In some embodiments, the refractive index of the refraction element 560c is n.

[0413] In some embodiments, there is a preset relationship between the first angle A and the second angle B, so that the light ultimately output by the light-bending element 560 c is vertically incident on the surface of the light-receiving chip.

[0414] The angle between the first inclined surface 562c and the surface of the light receiving chip is a first angle A. Exemplarily, the first connecting surface 563c is a horizontal surface. Then, the angle between the first inclined surface 562c and the first connecting surface 563c is the first angle A.

[0415] The angle between the second inclined surface 564c and the surface of the light receiving chip is a second angle B. Exemplarily, the second connecting surface 565c is a horizontal surface, and the angle between the second inclined surface 564c and the second connecting surface 565c is a second angle B.

[0416] According to the deduction of the geometric relationship, the angle between the reflected light of the first inclined surface 562 c and the first inclined surface 562 c is equal to the angle A.

[0417] The angle between the reflected light of the first inclined surface 562c and the vertical line is

[0418] The refraction angle at the first connection surface is angle γ. According to the law of refraction, but

[0419]

[0420] The incident angle of the second inclined surface 564c is angle α. According to the geometric relationship, Then α=γ+B, then

[0421]

[0422] According to the geometric relationship, the refraction angle at the second inclined surface 564c is angle B.

[0423] According to the law of geometry, sinα=n·sinB, and further, when sin{arcsin[n·sin(π2-2A)]+B}=n·sinB, the light finally output by the refracting element 560c is vertically incident on the surface of the light receiving chip.

[0424] According to the above description, the first angle A is not 45°. Based on this, it can also be confirmed that the angle between the incident light and the outgoing light of the first inclined surface 562c is not a right angle.

[0425] In the present disclosure, the refractive element includes a first inclined surface and a second inclined surface. The first inclined surface is a light path turning functional surface, which produces a larger turning in the light path transmission direction. The second inclined surface is a light path adjustment functional surface, which further adjusts the light path after the turning to: the light signal is vertically incident on 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 finally output by the refractive element is vertically incident on the surface of the light receiving chip to adapt to the limited photosensitive surface area of ​​the light receiving chip, thereby avoiding the light blocking problem and improving the light coupling efficiency incident on the light receiving chip. At the same time, the light signal reflected by the light receiving chip can be reflected into the air through the second inclined surface, thereby reducing the return loss and reducing the impact on the quality of the light receiving signal.

[0426] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. An optical module, characterized in that: include: circuit boards; A light receiving component is electrically connected to the circuit board, and the light receiving component includes: substrate; an optical fiber adapter, disposed on the surface of the substrate and configured to receive an optical signal; an optical beam splitter, disposed on the surface of the substrate and configured to decompose the optical signal output by the optical fiber adapter into multiple optical signals, wherein the optical path of the optical beam splitter is parallel to the surface of the circuit board; a light receiving chip, wherein the light receiving direction of the light receiving chip is perpendicular to the surface of the circuit board, and the light receiving chip is configured to convert a received optical signal into an electrical signal; A refracting member connected to the substrate and disposed between the light output path of the optical beam splitter and the light input path of the optical receiving chip, wherein the refracting member is configured to deflect the transmission direction of the optical signal output by the optical beam splitter toward the optical receiving chip; wherein the refracting member includes: a light incident surface, configured to receive the optical signal output by the optical beam splitter; a first inclined surface, disposed toward the light incident surface and located on an output light path of the light incident surface, the first inclined surface being inclined relative to a surface of the light receiving chip; the first inclined surface being configured to turn the optical signal transmission path toward the light receiving chip; and the optical signal output by the first inclined surface being transmitted in a direction non-perpendicular to the interface at which the optical signal arrives; The second inclined surface is arranged toward the first inclined surface and is located on the output light path of the first inclined surface; the second inclined surface is arranged at an angle relative to the surface of the light receiving chip; the second inclined surface is configured to adjust the light signal transmission path so that the light signal is vertically incident on the surface of the light receiving chip.

2. The optical module according to claim 1, wherein The second inclined surface is the interface to which the light signal outputted from the first inclined surface reaches, and the second inclined surface is set as the light-emitting surface of the light-refraction element; An end surface of the second inclined surface close to the first inclined surface is higher than an end surface of the second inclined surface far from the first inclined surface.

3. The optical module according to claim 1, wherein: The second inclined surface is the interface to which the light signal outputted from the first inclined surface reaches, and the second inclined surface is set as the light-emitting surface of the light-refraction element; An end surface of the second inclined surface close to the first inclined surface is lower than an end surface of the second inclined surface far from the first inclined surface.

4. The optical module according to claim 1, wherein: A first connecting surface is provided between the first inclined surface and the second inclined surface, and a second connecting surface is provided between the second inclined surface and the light incident surface; The first connecting surface is the interface to which the optical signal outputted from the first inclined surface reaches; The second connecting surface is the light emitting surface of the light refraction element; The optical signal output by the first inclined surface is transmitted along a direction non-perpendicular to the first connecting surface; The optical signal output by the first connecting surface is transmitted along a direction that is not perpendicular to the second inclined surface; The optical signal output by the second inclined surface is transmitted in a direction perpendicular to the second connecting surface; The optical signal output by the second connection surface is transmitted along a surface perpendicular to the light receiving chip.

5. The optical module according to claim 1, wherein: A lens group is provided between the beam splitter and the refractive element; The lens group includes a plurality of lenses, and the plurality of lenses are correspondingly arranged on the output optical paths of the light signals split by the optical beam splitter, with a spacing between adjacent lenses; Grooves are formed on the surface of the substrate, and there is a preset gap between adjacent grooves, so that when adjacent lenses are fixed by the bonding parts, there is a gap between the adjacent bonding parts.

6. An optical module, characterized in that: include: circuit boards; A light receiving component is electrically connected to the circuit board, and the light receiving component includes: substrate; an optical fiber adapter, disposed on the surface of the substrate and configured to receive an optical signal; an optical beam splitter, disposed on the surface of the substrate and configured to decompose the optical signal output by the optical fiber adapter into multiple optical signals, wherein the optical path of the optical beam splitter is parallel to the surface of the circuit board; a light receiving chip, wherein the light receiving direction of the light receiving chip is perpendicular to the surface of the circuit board, and the light receiving chip is configured to convert a received optical signal into an electrical signal; A refracting member is provided on the surface of the substrate and is provided between the light output path of the optical beam splitter and the light input path of the optical receiving chip, wherein the refracting member is configured to bend the transmission direction of the optical signal output by the optical beam splitter toward the optical receiving chip; wherein the refracting member includes: a light incident surface, configured to receive the optical signal output by the optical beam splitter; a first inclined surface, disposed toward the light incident surface and located on an output light path of the light incident surface, the first inclined surface being inclined relative to a surface of the light receiving chip; the first inclined surface being configured to reflect a received light signal so as to turn the light signal transmission path toward the light receiving chip; an angle between an incident light ray and an outgoing light ray on the first inclined surface being non-right angles; and an angle between the first inclined surface and the surface of the light receiving chip being a first angle; The second inclined surface is arranged toward the first inclined surface and is located on the output light path of the first inclined surface; the second inclined surface is arranged at an angle relative to the surface of the light receiving chip; the second inclined surface is configured to adjust the optical signal transmission path so that the light signal output by the second inclined surface is vertically incident on the surface of the light receiving chip; the angle between the second inclined surface and the surface of the light receiving chip is a second angle, and there is a preset relationship between the first angle and the second angle so that the light signal output by the second inclined surface is vertically incident on the surface of the light receiving chip.

7. The optical module according to claim 6, wherein: The refractive index of the refractive element is n; The included angle between the first inclined surface and the surface of the light receiving chip is a first angle A, and the included angle between the second inclined surface and the surface of the light receiving chip is a second angle B; When the first angle A and the second angle B satisfy the following relationship: n·sin(2A-B)=sinB, the optical signal output by the second inclined surface is vertically incident on the surface of the light receiving chip.

8. The optical module according to claim 6, wherein: The refractive index of the refractive element is n; the light incident surface of the refractive element is perpendicular to the surface of the light receiving chip; The included angle between the first inclined surface and the surface of the light receiving chip is a first angle A, and the included angle between the second inclined surface and the surface of the light receiving chip is a second angle B; When the first angle A and the second angle B satisfy the following relationship: n·sin(π 2 -2A+B)=sinB, the optical signal output by the second inclined surface is vertically incident on the surface of the light receiving chip.

9. The optical module according to claim 6, wherein: The refractive index of the refractive element is n; The angle between the first inclined surface and the surface of the light receiving chip is a first angle A, and the angle between the second inclined surface and the surface of the light receiving chip is a second angle B; When the first angle A and the second angle B satisfy: sin{arcsin[n·sin(π2-2A)]+B}=n·sinB, the optical signal finally output by the folding element is vertically incident on the surface of the light receiving chip.

10. The optical module according to claim 6, wherein: Grooves are formed on the surface of the substrate, and there is a preset gap between adjacent grooves.

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