Optical module

Abstract

An optical module (200) comprises a first light shaping assembly (540) or a second light shaping assembly, a filtering assembly (560) and photoelectric assemblies (570, 580), and the filtering assembly (560) is located on a light emitting path of the first light shaping assembly (540) or the second light shaping assembly. A photosensitive surface of the optoelectronic component (570, 580) faces the filter component (560). The first light shaping assembly (540) converts the second light signal into a first sub-beam and a second sub-beam; the first sub-light beam and the second sub-light beam both comprise first signal light and second signal light, and the wavelength of the first signal light is different from that of the second signal light. The central axis of the first light shaping assembly (540) coincides with the bisector of the included angle between the first sub-beam and the second sub-beam.

Description

optical modules

[0001] This application claims the priority of application number 202310321419.6 filed with the China Patent Office on March 29, 2023; the priority of application number 202320663571.8 filed with the China Patent Office on March 29, 2023; the priority of application number 202310321408.8 filed with the China Patent Office on March 29, 2023; the priority of application number 202310325419.3 filed with the China Patent Office on March 29, 2023; the priority of application number 202310464533.4 filed with the China Patent Office on April 26, 2023; and the priority of application number 202320981019.3 filed with the China Patent Office on April 26, 2023; all of which are incorporated by reference into this application. Technical Field

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

[0003] With the development of new services and application models such as cloud computing, mobile Internet, and video, the advancement of optical communication technology has become increasingly important. In optical communication technology, optical modules are one of the key components in optical communication equipment, and with the demand for development of optical communication technology, the transmission rate of optical modules continues to increase.

[0004] Summary of the Invention

[0005] An optical module includes a first light shaping component or a second light shaping component, a filtering component, and an optoelectronic component. The filtering component is located in the light output path of the first light shaping component or the second light shaping component. The photosensitive surface of the optoelectronic component faces the filtering component. The first light shaping component converts a second optical signal into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam both contain a first signal light and a second signal light, the wavelength of the first signal light and the wavelength of the second signal light being different. The central axis of the first light shaping component coincides with the bisector of the angle between the first sub-beam and the second sub-beam.

[0006] The first light shaping component includes: a beam splitter and a focusing lens; the second light signal is a collimated beam, and the focusing lens is located on the light output path of the beam splitter. The beam splitter splits the second light signal into a first sub-beam and a second sub-beam; the first and second sub-beams are converted into converging beams after passing through the focusing lens; the central axes of the beam splitter and the focusing lens are aligned. The second light shaping component includes a beam splitting component, a focusing lens, and a reflection component, wherein the beam splitting component splits the second light signal into a first, second, third, and fourth graded beams; the focusing lens focuses the first, second, third, and fourth graded beams; and the reflection component, located on the light output path of the beam splitting component, changes the direction of the first, second, third, and fourth graded beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0008] FIG1 is a partial architecture diagram of an optical communication system provided according to some embodiments of the present disclosure;

[0009] FIG2 is a partial structural diagram of a host computer provided according to some embodiments of the present disclosure;

[0010] FIG3 is a structural diagram of an optical module provided according to some embodiments of the present disclosure;

[0011] FIG4 is an exploded view of an optical module according to some embodiments of the present disclosure;

[0012] FIG5 is a structural diagram of an optical transceiver component provided according to some embodiments of the present disclosure;

[0013] FIG6 is an exploded view of FIG5 ;

[0014] FIG7 is a structural diagram of an optical receiving component according to some embodiments of the present disclosure;

[0015] FIG8 is a cross-sectional view of a light receiving component according to some embodiments of the present disclosure;

[0016] FIG9 is an exploded view of a light receiving component according to some embodiments of the present disclosure;

[0017] FIG10 is a light path diagram of a light receiving component according to some embodiments of the present disclosure;

[0018] FIG11 is a structural diagram of a filter assembly and an optoelectronic assembly according to some embodiments of the present disclosure;

[0019] FIG12 is a cross-sectional view of another light receiving component provided according to some embodiments of the present disclosure;

[0020] FIG13 is an exploded view of another light receiving component provided according to some embodiments of the present disclosure;

[0021] FIG14 is a light path diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0022] FIG15 is a cross-sectional view of another light receiving component provided according to some embodiments of the present disclosure;

[0023] FIG16 is an exploded view of another light receiving component according to some embodiments of the present disclosure;

[0024] FIG17 is a structural diagram of a light splitting element provided according to some embodiments of the present disclosure;

[0025] FIG18 is a light path diagram of a light splitter according to some embodiments of the present disclosure;

[0026] FIG19 is a light path diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0027] FIG20 is a cross-sectional view of another light receiving component provided according to some embodiments of the present disclosure;

[0028] FIG21 is a light path diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0029] FIG22 is a light path diagram of a segmentation prism according to some embodiments of the present disclosure;

[0030] FIG23 is a light path diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0031] FIG24 is a structural diagram of yet another Fresnel lens and a split prism according to some embodiments of the present disclosure;

[0032] FIG25 is a light path diagram of the light receiving component corresponding to FIG24;

[0033] FIG26 is a schematic diagram of an optical path of another light receiving component provided according to some embodiments of the present disclosure;

[0034] FIG27 is a schematic diagram showing an optical path of another light receiving component according to some embodiments of the present disclosure from another angle;

[0035] FIG28 is a schematic diagram of the optical path of yet another beam splitter prism according to some embodiments of the present disclosure;

[0036] FIG29 is a schematic diagram of an optical path of yet another beam splitter prism according to some embodiments of the present disclosure;

[0037] FIG30 is a cross-sectional schematic diagram of another light receiving component and a circuit board according to some embodiments of the present disclosure;

[0038] FIG31 is a schematic diagram of an optical path of a first turning prism according to some embodiments of the present disclosure;

[0039] FIG32 is a schematic diagram of an optical path of a second turning prism according to some embodiments of the present disclosure;

[0040] FIG33 is a schematic diagram of an optical path of a third turning prism according to some embodiments of the present disclosure;

[0041] FIG34 is a schematic diagram of an optical path of a fourth turning prism according to some embodiments of the present disclosure;

[0042] FIG35 is a schematic structural diagram of another light receiving component and a circuit board according to some embodiments of the present disclosure;

[0043] FIG36 is a light path diagram of another light receiving component provided according to some embodiments of the present disclosure;

[0044] FIG37 is a light path diagram of another light receiving component at another angle according to some embodiments of the present disclosure;

[0045] FIG38 is a cross-sectional view of another light receiving component and a circuit board according to some embodiments of the present disclosure;

[0046] FIG39 is a structural diagram of yet another reflective component provided according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0048] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0049] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0050] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0051] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0052] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0053] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0054] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0055] 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 enabling 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.

[0056] 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.

[0057] FIG1 is a partial structural diagram of an optical communication system according to some embodiments. As shown in FIG1 , 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 .

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Figure 2 is a partial structural diagram of a host computer according to some embodiments. To clearly illustrate the connection between the optical module 200 and the host computer 100, Figure 2 only shows the structure of the host computer 100 related to the optical module 200. As shown in Figure 2, the host computer 100 also includes a PCB circuit board 105 disposed within the housing, a cage 106 disposed on the surface of the PCB circuit board 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 raised structures such as fins to increase the heat dissipation area.

[0064] 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.

[0065] Figure 3 is a structural diagram of an optical module according to some embodiments, and Figure 4 is an exploded view of an optical module according to some embodiments. As shown in Figures 3 and 4, the optical module 200 includes a housing, a circuit board 300 disposed within 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 either the light emitting component 400 or the light receiving component 500.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] The direction of the line connecting the two openings 204 and 205 can be consistent with the length direction of the optical module 200, or it can be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 (the right end in Figure 3), and the opening 205 is also located at the end of the optical module 200 (the left end in Figure 3). Alternatively, the opening 204 is located at the end of the optical module 200, and the opening 205 is located on the side of the optical module 200. The opening 204 is an electrical port, from which the gold finger 301 of the circuit board 300 extends and is inserted into the electrical connector of the host computer 100; the opening 205 is an optical port, which is configured to connect to the external optical fiber 101, so that the optical fiber 101 connects the optical emitting component 400 and the optical receiving component 500 in the optical module 200.

[0070] 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.

[0071] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials, which facilitates electromagnetic shielding and heat dissipation.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The circuit board 300 also includes a gold finger 301 formed on its end surface, and 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 set only on the surface of one side of the circuit board 300 (for example, the upper surface shown in Figure 4), or it can be set on the upper and lower surfaces of the circuit board 300 to provide a larger number of pins, thereby adapting to occasions where a large number of pins are required. The gold finger 301 is configured to establish an electrical connection with the host computer to achieve power supply, grounding, two-wire synchronous serial (Inter-Integrated Circuit, I2C) signal transmission, data signal transmission, etc. Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement rigid circuit boards.

[0077] 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 .

[0078] 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.

[0079] In some embodiments, at least one of the light emitting component 400 or the light receiving component 500 may be directly disposed on the circuit board 300. For example, at least one of the light emitting component 400 or the light receiving component 500 may be disposed on a surface of the circuit board 300 or a side of the circuit board 300.

[0080] Figure 5 is a structural diagram of an optical transceiver component provided according to some embodiments of the present disclosure. Figure 6 is an exploded view of Figure 5. As shown in Figures 5 and 6, in some embodiments, the optical transceiver component includes a round square tube 900, an optical emitting component 400, an optical receiving component 500, an optical assembly 800, and a fiber optic adapter 700.

[0081] Specifically, the square tube body 900 has a first tube opening, a second tube opening, and a third tube opening, which are used to carry and fix the light emitting component 400, the light receiving component 500, the optical assembly 800, and the fiber optic adapter 700. Specifically, the light emitting component 400 is connected to the first tube opening, the light receiving component 500 is placed in the second tube opening, the optical assembly 800 is arranged in the inner cavity of the square tube body 900, and the fiber optic adapter 700 is placed in the third tube opening.

[0082] Typically, the first and second pipe openings are respectively arranged on adjacent side walls of the round square tube body 900 , the first and third pipe openings are respectively arranged on the side walls of the round square tube body 900 in the length direction, and the second pipe opening is arranged on the side wall of the round square tube body 900 in the width direction.

[0083] The square tube 900 is typically made of metal, which facilitates electromagnetic shielding and heat dissipation. Specifically, the light-emitting component 400 thermally contacts the square tube 900 via a first adjustment ring, while the light-receiving component 500 thermally contacts the square tube 900 via a second nozzle. The light-receiving component 500 is directly press-fitted into the square tube 900, and the square tube 900 contacts the light-emitting component 400 and the light-receiving component 500, respectively, either directly or through a heat-conducting medium. This ensures that the square tube 900 dissipates heat from the light-emitting component 400 and the light-receiving component 500 effectively.

[0084] The light emitting component 400 is connected to the circuit board 300 via a flexible circuit board and is used to transmit data light. Specifically, the light emitting component 400 includes a socket and a cap. The cap is mounted on the socket, and a light emitting chip is housed within the cavity enclosed by the cap and socket. Data light emitted by the light emitting chip is transmitted through the optical assembly 800 and into the fiber optic adapter 700.

[0085] The light receiving component 500 is connected to the circuit board 300 through a flexible circuit board and is used to receive data light.

[0086] The optical component 800 is disposed in the inner cavity of the square tube 900 and is used to adjust the data light emitted by the light emitting component 400 and the data light received by the light receiving component 500.

[0087] The fiber optic adapter 700 is used to connect optical fibers. Specifically, the light emitting component 400 is connected to the first opening of the square tube, the light receiving component 500 is placed at the second opening of the square tube, and the fiber optic adapter 700 is placed at the third opening of the square tube. The light emitting component 400 and the light receiving component 500 each establish optical connections with the fiber optic adapter 700. The data light emitted by the light emitting component 400 and the light received by the light receiving component 500 are both transmitted through the same optical fiber in the fiber optic adapter 700. That is, the same optical fiber in the fiber optic adapter 700 serves as the transmission channel for light entering and exiting the optical transceiver, enabling single-fiber bidirectional optical transmission.

[0088] Figure 7 is a structural diagram of an optical receiving component according to some embodiments of the present disclosure. Figure 8 is a cross-sectional diagram of an optical receiving component according to some embodiments of the present disclosure. Figure 9 is an exploded schematic diagram of an optical receiving component according to some embodiments of the present disclosure.

[0089] As shown in Figures 7, 8, and 9, the light receiving component 500 provided in this embodiment includes a base 510, a cap 520, a light shaping assembly, a filter assembly 560, and an optoelectronic assembly. The cap 520 is mounted on one end of the base 510. For example, the cap 520 snaps onto the base 510 to form a light receiving space. The light shaping assembly, filter assembly 560, and optoelectronic assembly are located within the light receiving space. The filter assembly 560 is located in the light path of the light shaping assembly, with the photosensitive surface of the optoelectronic assembly facing the filter assembly. The filter assembly 560 and optoelectronic assembly are mounted on the base 510, which supports and carries the filter assembly 560 and optoelectronic assembly. The base 510 includes several pins 530, which are provided with multiple through-holes for securing the pins. The pins are used to electrically connect the flexible printed circuit board to the light receiving component 500, and further to electrically connect the light receiving component 500 to the circuit board 300. This embodiment uses the structure shown in Figure 7 as an example.

[0090] The filter assembly 560 is positioned above the optoelectronic assembly to filter out signal light of different wavelengths. The optoelectronic assembly includes a first photodetector 570 and a second photodetector 580. The optoelectronic assembly is positioned on the surface of the tube base 510. The tube cap 520 snaps onto the tube base 510, forming a light-receiving space within which the first and second photodetectors 570, 580, the light shaping assembly, and the filter assembly 560 are positioned.

[0091] The base 510 is used to support and carry the first photodetector 570, the second photodetector 580 and the filter assembly 560. The base 510 is provided with a plurality of through holes for fixing the pins.

[0092] To increase the optical communication rate, the optical module is configured with multiple optical channels, each carrying a different signal. Multiple channels refers to at least two optical channels. Different optical channels carry different signals. Therefore, the optical receiving component 500 is configured with multiple optical receiving channels to simultaneously receive multiple signal lights. In the embodiments of the present disclosure, the multiple signal lights include at least two signal lights.

[0093] In some embodiments of the present disclosure, a through hole 5021 is provided on the top of the cap of the optical receiving component 500 to facilitate receiving the second optical signal from the optical fiber adapter 700. In some embodiments of the present disclosure, the second optical signal includes signal light of one or more wavelengths, and the number of signal lights included in the second optical signal can be 2, 3, 4, or other values.

[0094] In some examples, the second optical signal includes a first signal light and a second signal light, wherein the first signal light and the second signal light have different wavelengths, for example, the first signal light has a wavelength of λ1 and the second signal light has a wavelength of λ2.

[0095] In some other examples, the second optical signal may include a first signal light with a wavelength of λ1, a second signal light with a wavelength of λ2, a third signal light with a wavelength of λ3, and a fourth signal light with a wavelength of λ4.

[0096] The light shaping component is configured to split the second optical signal into at least two (eg, two, four, six, etc.) sub-beams, and couple them to the optoelectronic component through the filtering component 560 .

[0097] For example, when the second optical signal includes a first signal light and a second signal light, the light shaping component is configured to split the second optical signal into two sub-beams; in this case, the light shaping component can be referred to as a first light shaping component. For another example, when the second optical signal includes a first signal light, a second signal light, a third signal light, and a fourth signal light, the light shaping component is configured to split the second optical signal into four sub-beams; in this case, the light shaping component can be referred to as a second light shaping component.

[0098] The first light shaping component converts the second optical signal into a first sub-beam and a second sub-beam. The second optical signal includes the first signal light and the second signal light. The first and second sub-beams are converging beams, each containing the first and second signal light; that is, the first sub-beam contains the first and second signal light, and the second sub-beam contains the first and second signal light. The first and second sub-beams are two beams of light with equal power but different angles, wherein the first and second signal light have different wavelengths, for example, the wavelength of the first signal light is λ1 and the wavelength of the second signal light is λ2. The sum of the power of the first sub-beam and the power of the second sub-beam equals the power of the second optical signal, and the power of the first sub-beam is the same as the power of the second sub-beam. The channel aperture of the first sub-beam is the same as the channel aperture of the second optical signal; the channel aperture of the second sub-beam is the same as the channel aperture of the second optical signal. The aperture of the first sub-beam is the diameter of the optical channel of the first sub-beam. The aperture of the second sub-beam is the diameter of the optical channel of the second sub-beam. The channel aperture of the second optical signal is the diameter of the optical channel of the second optical signal.

[0099] FIG10 is an optical path diagram of an optical receiving component provided according to some embodiments of the present disclosure; FIG11 is a structural diagram of a filter assembly and an optoelectronic assembly provided according to some embodiments of the present disclosure. Referring to FIG10 and FIG11, the filter assembly 560 includes a first filter 561 and a second filter 562, wherein the first filter 561 is located on the optical path of the first sub-beam, and the second filter 562 is located on the optical path of the first sub-beam. The first filter 561 filters the first sub-beam, allowing the first signal light with a wavelength of λ1 to pass through and reflecting the second signal light with a wavelength of λ2. The second filter 562 filters the second sub-beam, allowing the second signal light with a wavelength of λ2 to pass through and reflecting the first signal light with a wavelength of λ1.

[0100] Continuing with Figures 10 and 11 , to facilitate the installation and fixation of the first filter 561 and the second filter 562, the filter assembly 560 further includes a base 560a and a first baffle 560b and a second baffle 560c disposed on either side of the base 560a. The first baffle 560b supports the first filter 561 so that it is positioned above the first photodetector 570. The second baffle 560c supports the second filter 562 so that it is positioned above the second photodetector 580.

[0101] In some examples, a first photodetector 570 is disposed on the upper surface of the tube holder 510. The first photodetector 570 is located in the light-emitting direction of the first filter 561. The first filter 561 filters the first sub-beam and only allows the first signal light with a wavelength of λ1 to pass through. The first photodetector 570 receives the first signal light and converts the first signal light into an electrical signal, which is transmitted to the circuit board through the pin. A second photodetector 580 is disposed on the upper surface of the tube holder 510. The second photodetector 580 is located in the light-emitting direction of the second filter 562. The second filter 562 filters the second sub-beam and only allows the second signal light with a wavelength of λ2 to pass through. The second photodetector 580 receives the second signal light and converts the second signal light into an electrical signal, which is transmitted to the circuit board through the pin.

[0102] In some embodiments, the projection of the first filter 561 on the tube base 510 covers the photosensitive surface of the first photodetector 570, and the projection of the second filter 562 on the tube base 510 covers the photosensitive surface of the second photodetector 580. The area of ​​the first filter 561 is larger than the area of ​​the photosensitive surface of the first photodetector 570, and the area of ​​the second filter 562 is larger than the area of ​​the photosensitive surface of the second photodetector 580. The distance between the first filter 561 and the tube base 510 is equal to the distance between the second filter 562 and the tube base 510.

[0103] The central axis of the first filter 561 is parallel to the central axis of the second filter 562 , and the central axis of the first filter 561 is parallel to the central axis of the first light shaping component, and the central axis of the second filter 562 is parallel to the central axis of the first light shaping component.

[0104] Therefore, the central axis of the first filter 561, the central axis of the second filter 562, and the central axis of the first light shaping assembly are all arranged in parallel. In some embodiments, the central axes of the first filter 561, the second filter 562, and the first light shaping assembly are all perpendicular to the surface of the tube base 510, eliminating the need for different angles, which helps improve the coupling accuracy of the optical module. In some embodiments of the present disclosure, the first filter 561 and the second filter 562 are both perpendicular to the tube base 510. During installation, only the vertical distance between the first filter and the second filter and the tube base surface needs to be adjusted, without adjusting the angle between the first filter and the tube base surface, or the angle between the second filter and the tube base surface. This helps improve the coupling accuracy of the optical module.

[0105] The following explanation assumes the plane of the socket surface is the XY coordinate plane, and the axis perpendicular to the socket surface is the Z axis. During installation, simply set the coordinate of the first filter's plane center on the Z axis to determine its position. Setting the angle between the first filter and the XY coordinate plane is unnecessary, making it easier to secure the first filter's position during installation and improving the optical module's coupling accuracy.

[0106] Similarly, a first photodetector 570 is located in the light-emitting direction of the first filter 561. The first photodetector 570 receives the first signal light and converts it into an electrical signal, which is then transmitted to the circuit board via the pins. A second photodetector 580 is disposed on the upper surface of the tube holder 510. The second filter 562 filters the second sub-beam, allowing only the first signal light with a wavelength of λ1 to pass through. The second photodetector 580 receives the second signal light and converts it into an electrical signal, which is then transmitted to the circuit board via the pins.

[0107] The photosensitive surface of the first photodetector 570 faces the first filter 561, and the normal line of the photosensitive surface of the first photodetector 570 is perpendicular to the first filter 561. The photosensitive surface of the second photodetector 580 faces the second filter 562, and the normal line of the photosensitive surface of the second photodetector 580 is perpendicular to the first filter 561.

[0108] In some embodiments of the present disclosure, a first substrate is disposed between the first photodetector 570 and the base, with a first circuit disposed on a surface of the first substrate connected to the first pin for transmitting the electrical signal from the first photodetector 570 to the first pin. A second substrate is disposed between the second photodetector 580 and the base, with a second circuit disposed on a surface of the second substrate connected to the second pin for transmitting the electrical signal from the second photodetector 580 to the second pin.

[0109] In some embodiments of the present disclosure, the first filter 561 is placed as close as possible to the photosensitive surface of the first photodetector 570 to prevent the second signal light with a wavelength of λ2 from entering the first photodetector 570, thereby reducing the impact of stray light on the received signal of the first photodetector 570. The second filter 562 is placed as close as possible to the photosensitive surface of the second photodetector 580 to prevent the first signal light with a wavelength of λ1 from entering the second photodetector 580, thereby reducing the impact of stray light on the received signal of the second photodetector 580.

[0110] Therefore, in some embodiments of the present disclosure, the normal to the photosensitive surface of the first photodetector 570, the normal to the photosensitive surface of the second photodetector 580, the central axis of the first filter 561, the central axis of the second filter 562, and the central axis of the first light shaping assembly are all arranged in parallel. In some embodiments provided by the present disclosure, the normal to the photosensitive surface of the first photodetector 570, the normal to the photosensitive surface of the second photodetector 580, the first filter 561, the second filter 562, and the central axis of the first light shaping assembly are all perpendicular to the surface of the tube holder 510, eliminating the need for different angles, which helps improve the coupling accuracy of the optical module.

[0111] In some embodiments, the first light shaping assembly includes a focusing lens 545 and a beam splitter. The second optical signal is a collimated beam. For example, a collimator is provided within the optical fiber adapter, and the second optical signal emitted by the optical fiber adapter is a collimated beam. The focusing lens 545 is located in the optical path of the beam splitter. The beam splitter splits the second optical signal into a first sub-beam and a second sub-beam. The first and second sub-beams are converted into converging beams after passing through the focusing lens 545. The central axes of the beam splitter and the focusing lens 545 are aligned. The central axis of the first light shaping assembly coincides with the bisector of the angle between the first and second sub-beams.

[0112] The second optical signal emitted by the collimating adapter enters the beam splitter and is fractionally diffracted into two collimated beams of ±1 order. Focusing lens 545 converts the first and second sub-beams from collimated beams into convergent beams. Filter assembly 560 filters the first and second sub-beams separately. The filtered beams are received by the optoelectronic assembly, which converts the optical signal into an electrical signal. This electrical signal is transmitted via pins to the circuit board, and then to the host computer.

[0113] In some examples, the beam splitter can be a diffraction beam splitter, and diffraction beam splitter 544 is located at through-hole 5021. Diffraction beam splitter 544 splits the second optical signal into two parallel beams. That is, the first sub-beam and the second sub-beam are both parallel beams. Diffraction beam splitter 544 is made of optical glass with a thickness of 0.3 mm and an aperture of 1.5 mm. The output beam has an inclination angle of ±12.5° and a beam diameter of 500 μm.

[0114] As shown in Figure 10, with the optical axis of the second signal light as the reference line, the angle between the optical axis of the first sub-beam and the reference line is θ, and the angle between the optical axis of the second sub-beam and the reference line is -θ. In other words, the angles between the optical axis of the first sub-beam and the reference line are the same, but in opposite directions.

[0115] In some embodiments, the angle between the optical axis of the first sub-beam and the reference line is greater than or equal to 10°, and the angle between the optical axis of the first sub-beam and the reference line is less than or equal to 35°. The tube cap also defines a lens mounting hole, and a focusing lens 545 is located in the lens mounting hole. The focusing lens 545 converts the first sub-beam from a collimated beam to a converging beam, and also converts the second sub-beam from a collimated beam to a converging beam.

[0116] In some embodiments, focusing lens 545 can be a single lens or a combination of two lenses. When focusing lens 545 is a plano-convex lens, one side of the lens is flat and the other side is convex. Light is refracted on the convex surface of focusing lens 545, resulting in a converging effect. In some examples, the convex surface of focusing lens 545 can be positioned toward the diffraction beam splitter or toward filter assembly 560.

[0117] In some embodiments, the focusing lens 545 includes only one plano-convex lens with a relatively large height. When the focusing lens 545 includes only one plano-convex lens with a relatively large height, the upper half of the focusing lens converges the first sub-beam emitted by the diffraction beam splitter 544, and the lower half of the focusing lens converges the second sub-beam emitted by the diffraction beam splitter 544. A focusing lens with a relatively large height can converge the signal light received by the light receiving component. The sum of the apertures of the two sub-beams emitted by the diffraction beam splitter 544 is greater than the aperture of the second signal light received by the diffraction beam splitter 544. The focusing lens 545 only includes one focusing lens with a relatively large height to converge the two sub-beams emitted by the diffraction beam splitter 544, and the converged light spot effect is better.

[0118] In addition, the assembly difficulty of assembling two smaller plano-convex lenses in a cavity is increased compared to a single plano-convex lens of greater height. To reduce the assembly difficulty, in some embodiments, the focusing lens 545 includes only one plano-convex lens of greater height, and the central axis of the focusing lens coincides with the central axis of the diffraction beam splitter 544.

[0119] In some embodiments, focusing lens 545 may be a Fresnel lens, also known as a spiral lens. A Fresnel lens is a thin sheet of polyolefin material, or a thin sheet of glass, formed by injection molding. One surface of a Fresnel lens is smooth, while the other surface is engraved with concentric circles arranged from small to large. The texture of the Fresnel lens is designed based on light interference and perturbation, relative sensitivity, and reception angle requirements.

[0120] When focusing lens 545 is a plano-convex lens, the distance between focusing lens 545 and the diffraction beam splitter is 0.8 mm to 1.2 mm. The angle between the optical axis of the first sub-beam and the reference line is inversely proportional to the distance between the diffraction beam splitter and focusing lens 545. That is, the larger the angle between the optical axis of the first sub-beam and the reference line, the smaller the distance between the diffraction beam splitter and focusing lens 545 can be. Reducing the distance between the diffraction beam splitter and focusing lens 545 makes the various structures within the light receiving component more compact, which helps reduce the overall space of the light receiving component.

[0121] In some embodiments, the central axis of the focusing lens 545 is arranged parallel to the central axis of the diffraction beam splitter 544, and does not need to be arranged at different angles, which is beneficial to improving the coupling accuracy of the optical module.

[0122] In some embodiments, when a collimator is not present within the fiber optic adapter, the light shaping assembly may further include a collimating lens. The collimating lens is positioned within the through-hole 5021 of the tube cap, while the diffraction beam splitter 544 and focusing lens 545 are positioned within the light receiving space. After being collimated by the collimating lens, the signal light emitted by the fiber optic adapter enters the diffraction beam splitter 544 and focusing lens 545. The signal light is first fractionally diffracted by the diffraction beam splitter 544 into two collimated beams of ±1 order, and then converged by the focusing lens 545.

[0123] FIG10 shows that when the focusing lens 545 is a single lens and the convex surface of the focusing lens 545 can face the diffraction beam splitter, the central axis of the first sub-beam forms a certain angle with the convex surface of the focusing lens 545. The convex surface of the focusing lens 545 forms a converging effect on the first sub-beam based on the principle of refraction. After passing through the convex surface of the focusing lens 545, the first sub-beam is converted from a parallel beam to a converging beam. The central axis of the second sub-beam forms a certain angle with the convex surface of the focusing lens 545. The convex surface of the focusing lens 545 forms a converging effect on the second sub-beam based on the principle of refraction. After passing through the convex surface of the focusing lens 545, the second sub-beam is converted from a parallel beam to a converging beam. In some embodiments, the beam after the first sub-beam is converged and the beam after the second sub-beam is converged have the same focal length.

[0124] The central axis of the first filter 561 is parallel to the central axis of the second filter 562 , and the central axis of the first filter 561 is parallel to the central axis of the focusing lens 545 , and the central axis of the second filter 562 is parallel to the central axis of the focusing lens 550 .

[0125] Therefore, the central axis of the first filter 561, the central axis of the second filter 562, the central axis of the focusing lens 545, and the central axis of the diffraction beam splitter are all arranged in parallel. In some embodiments provided by the present disclosure, the central axes of the first filter 561, the second filter 562, the focusing lens 550, and the diffraction beam splitter are all perpendicular to the surface of the tube base 510, eliminating the need for different angle settings, which is beneficial for improving the coupling accuracy of the optical module. In some embodiments of the present disclosure, the first filter 561 and the second filter 562 are both perpendicular to the tube base 510. During installation, only the vertical distance between the first filter and the second filter and the tube base surface needs to be set, and there is no need to set the angle between the first filter and the tube base surface, nor the angle between the second filter and the tube base surface. This is beneficial for improving the coupling accuracy of the optical module.

[0126] Therefore, in some embodiments of the present disclosure, the normal to the photosensitive surface of the first photodetector 570, the normal to the photosensitive surface of the second photodetector 580, the central axis of the first filter 561, the central axis of the second filter 562, the central axis of the focusing lens 545, and the central axis of the diffraction beam splitter are all arranged in parallel. In some embodiments provided by the present disclosure, the normal to the photosensitive surface of the first photodetector 570, the normal to the photosensitive surface of the second photodetector 580, the first filter 561, the second filter 562, the focusing lens 545, and the central axis of the diffraction beam splitter are all perpendicular to the surface of the tube holder 510, eliminating the need for different angles, which is beneficial to improving the coupling accuracy of the optical module.

[0127] The diffraction beam splitter splits the parallel light beam into two sub-beams with different angles. These sub-beams then pass through focusing lens 550 and converge onto different photodetectors, where they convert the optical signals into electrical signals. Using a diffraction beam splitter allows for optical channel design, eliminating the need for tilting filters and improving the coupling accuracy of the optical module.

[0128] FIG12 is a cross-sectional view of another optical receiving component provided according to some embodiments of the present disclosure, and FIG13 is an exploded view of another optical receiving component provided according to some embodiments of the present disclosure. FIG14 is an optical path diagram of another optical receiving component provided according to some embodiments of the present disclosure. As shown in FIG12 to FIG14, in some embodiments of the present disclosure, the focusing lens 545 is a Fresnel lens, and the optical surface of the Fresnel lens is glued together with the diffraction beam splitter 544. The concentric surface of the Fresnel lens faces the tube holder. After passing through the diffraction beam splitter, the second signal light is fractionally diffracted into a first sub-beam and a second sub-beam of ±1 order, wherein the first sub-beam and the second sub-beam are both collimated beams. The first sub-beam and the second sub-beam then enter the Fresnel lens, which converges the first sub-beam and the second sub-beam respectively. The Fresnel lens converges the first sub-beam into one light spot, and the Fresnel lens converges the second sub-beam into another light spot.

[0129] In some embodiments of the present disclosure, a transimpedance amplifier may be provided above the tube base to receive and amplify the electrical signal from the photodetector, and the amplified electrical signal is transmitted to the circuit board via the tube pin.

[0130] In some other examples, the beam splitter may also be the beam splitting element 546 .

[0131] Figure 15 is a cross-sectional view of another light receiving component according to some embodiments of the present disclosure; Figure 16 is an exploded view of another light receiving component according to some embodiments of the present disclosure. Referring to Figures 15 and 16, in some other embodiments, the first shaping assembly may include a beam splitter 546 and a focusing lens 547. The focusing lens 547 is located between the beam splitter 546 and the first filter 561 and the second filter 562. The focusing lens 547 is used to converge the two split sub-beams.

[0132] The beam splitter 546 uses the principle of refraction to split the received data light (i.e., the second signal light). The two split sub-beams have different angles and overlap before being received by the focusing lens 547. The two split sub-beams each include data light of a first specific wavelength (i.e., the first sub-beam) and data light of a second specific wavelength (i.e., the second sub-beam).

[0133] A beam of data light is incident symmetrically along the central axis of beam splitter 546 onto the incident surface of beam splitter 546 and propagates within beam splitter 546. The data light is refracted and split at the two exit surfaces of beam splitter 546. The two split sub-beams include at least data light of a first specific wavelength and data light of a second specific wavelength, with a power ratio of 1:1 between the two sub-beams. The incident surface of beam splitter 546 is the surface of beam splitter 546 facing away from focusing lens 547, while the exit surface of beam splitter 546 is the surface of beam splitter 546 facing focusing lens 547.

[0134] A beam of data light is split into two sub-beams by the spectrometer 546, and the two sub-beams are converged by the focusing lens 547. One converged light is filtered by the first filter 561, and the other converged light is filtered by the second filter 562. The converged light of the first specific wavelength is received by the first photodetector 570, and the converged light of the second specific wavelength is received by the second photodetector 580, so that the light receiving component 500 realizes a dual-channel receiving function.

[0135] In some embodiments, the focusing lens 547 is a plano-convex lens that uses the principle of light refraction to converge the received data light.

[0136] In some embodiments, the plane of the plano-convex lens faces the exit surface of the beam splitter 546 , and the convex surface of the plano-convex lens faces the first filter 561 and the second filter 562 .

[0137] In some embodiments, the convex surface of the plano-convex lens faces the exit surface of the beam splitter 546 , and the flat surface of the plano-convex lens faces the first filter 561 and the second filter 562 .

[0138] In some embodiments, the focusing lens 547 is a Fresnel lens. Fresnel lenses, also known as spiral lenses, are usually made of thin sheets of polyolefin material injection-molded, but can also be made of glass. One side of the lens surface is smooth, and the other side is engraved with concentric circles from small to large.

[0139] A cross-section of a Fresnel lens reveals a surface composed of a series of sawtooth-shaped grooves, with an elliptical arc at the center. Each groove has a different angle relative to the adjacent grooves, but all focus the light to form a central focal point, the focal point of the lens. Each groove can be considered an independent small lens, focusing the data light.

[0140] In some embodiments, the optical surface of the Fresnel lens faces the exit surface of the beam splitter 546 , and the surface of the Fresnel lens engraved with concentric circles faces the first filter 561 and the second filter 562 .

[0141] In some embodiments, the surface of the Fresnel lens engraved with the concentric circles faces the exit surface of the beam splitter 546 , and the optical surface of the Fresnel lens faces the first filter 561 and the second filter 562 .

[0142] In some embodiments, when the focusing lens 547 is a plano-convex lens, the thickness of the focusing lens 547 reaches 0.5 mm, the aperture of the focusing lens 547 is 0.90 mm, and the vertical distance between the focusing lens 547 and the first filter 561 and the second filter 562 is 0.5 mm.

[0143] In some embodiments, when the focusing lens 547 is a Fresnel lens, the thickness of the focusing lens 547 reaches 0.3 mm, the aperture of the focusing lens 547 is 2 mm, and the vertical distance between the focusing lens 547 and the first filter 561 and the second filter 562 is 1.1 mm.

[0144] The data light received by the light receiving component 500 can be collimated light or divergent light.

[0145] In some embodiments, the data light received by the light receiving component 500 is collimated light, and the light receiving component 500 does not include a collimating lens.

[0146] In some embodiments, the data light received by the light receiving component 500 is divergent light. In order to improve the coupling efficiency, the light receiving component 500 includes a collimating lens. The collimating lens 504 is clamped at the through hole 5021 of the tube cap 520. The collimating lens collimates the data light received by the light receiving component 500 to obtain collimated light.

[0147] A beam of collimated light is incident vertically onto the incident surface of the beam splitter 546, transmitted inside the beam splitter 546, and split after being refracted at the two exit surfaces of the beam splitter 546. The angles of the two beams of collimated light after splitting are different, the powers of the two beams of collimated light after splitting are the same, the sum of the powers of the two beams of collimated light after splitting is equal to the power of the collimated light before splitting, and both the collimated light before splitting and the two beams of collimated light after splitting include collimated light of the first specific wavelength and collimated light of the second specific wavelength.

[0148] FIG17 is a structural diagram of a spectrometer provided according to some embodiments of the present disclosure. FIG18 is an optical path diagram of a spectrometer provided according to some embodiments of the present disclosure. As shown in FIG17 and FIG18, in some embodiments, the spectrometer 546 includes an incident surface, a first exit surface, and a second exit surface. The first exit surface and the second exit surface are connected. Both the first exit surface and the second exit surface are not parallel to the incident surface. The angle between the first exit surface and the central axis of the spectrometer is different from the angle between the second exit surface and the central axis of the spectrometer, so that the angles of the two beams of collimated light split after refraction by the first exit surface and the second exit surface are different.

[0149] Collimated light is incident perpendicularly on the incident surface of the beam splitter 546, propagates within the beam splitter 546, and is refracted and split at the first and second exit surfaces of the beam splitter 546. The collimated light emitted from the second exit surface of the upper half of the beam splitter 546 is directed toward the lower half of the focusing lens 547, while the collimated light emitted from the first exit surface of the lower half of the beam splitter 546 is directed toward the upper half of the focusing lens 547. As a result, the two beams of collimated light split by the beam splitter 546 overlap at the rear of the beam splitter 546 and before being received by the focusing lens 547.

[0150] In some embodiments, the first and second exit surfaces of the beam splitter 546 are symmetrically arranged along the central axis of the beam splitter 546. Thus, the two collimated light beams split by the beam splitter 546 are symmetrically arranged along the central axis of the beam splitter 546. That is, the angle of one collimated light beam split by the beam splitter 546 (the angle of one collimated light beam refers to the angle γ between the one collimated light beam and the central axis of the beam splitter 546) and the angle of the other collimated light beam split by the beam splitter 546 (the angle of the other collimated light beam refers to the angle -γ between the other collimated light beam and the central axis of the beam splitter 546) are the same, but the directions of the two collimated light beams are different. Specifically, one collimated light beam is emitted from the lower half of the beam splitter 546 toward the upper half of the focusing lens 547, and the other collimated light beam is emitted from the upper half of the beam splitter 546 toward the lower half of the focusing lens 547.

[0151] If the angle of the two collimated light beams after being split by the beam splitter 546 is small, it is difficult to separate the two collimated light beams after being split by the beam splitter 546. If the angle of the two collimated light beams after being split by the beam splitter 546 is large, it is easy to separate the collimated light beams after being split by the beam splitter 546, but the distance between the two beams is large and cannot meet the size of the cavity enclosed by the tube base 510 and the tube cap 520. In order to separate the two collimated light beams after being split by the beam splitter 546 while meeting the size of the cavity enclosed by the tube base 510 and the tube cap 520, in some embodiments, the angle γ of one collimated light beam after being split by the beam splitter 546 is 15° to 40°, and the angle -γ of the other collimated light beam after being split by the beam splitter 546 is -40° to -15°.

[0152] The first exit surface and the second exit surface are symmetrically arranged along the central axis of the beam splitter 546. The angle between the first exit surface and the central axis of the beam splitter 546 is the first angle -α, and the angle between the second exit surface and the central axis of the beam splitter 546 is the second angle α. Then the first angle -α and the second angle α are symmetrically arranged along the central axis of the beam splitter 546.

[0153] Because the materials of the beam splitter 546 vary, the refractive index of the beam splitter 546 also varies. To ensure that the angle γ of one beam of collimated light after the beam splitter 546 is split within a range of 15° to 40°, and the angle -γ of the other beam of collimated light after the beam splitter 546 is split within a range of -40° to -15°, in some embodiments, the beam splitter 546 is made of glass, and the first angle -α is within a range of -115° to -95°, i.e., the angle -β between the first exit surface of the beam splitter 546 and the incident surface of the beam splitter 546 is within a range of -25° to -5°.

[0154] The material of the beam splitter 546 is glass, and the second angle α is 95° to 115°, that is, the angle β between the second emission surface of the beam splitter 546 and the incident surface of the beam splitter 546 is 5° to 25°.

[0155] The refractive index of silicon material is greater than the refractive index of glass. In some embodiments, the material of the beam splitter 546 is silicon material, and the first angle -α is -103° to -93°, that is, the angle -β between the first exit surface of the beam splitter 546 and the incident surface of the beam splitter 546 is -13° to -3°.

[0156] The beam splitter 546 is made of silicon, and the second angle α is 93° to 103°, that is, the angle β between the second exit surface of the beam splitter 546 and the incident surface of the beam splitter 546 is 3° to 13°.

[0157] In some embodiments, the light splitter 546 includes a first light guide 5461 and a second light guide 5462. The first light guide 5461 and the second light guide 5462 are symmetrically arranged along the central axis of the light splitter 546. The first light guide 5461 includes a first exit surface, the second light guide 5462 includes a second exit surface, and the first light guide 5461 and the second light guide 5462 are connected by glue.

[0158] The bottom surfaces of the first light guide 5461 and the second light guide 5462 are both located near the central axis of the light splitter 546, and the collimated light is primarily transmitted along the central axis of the light splitter 546. To improve coupling efficiency and facilitate processing, in some embodiments, the bottom surfaces of the first light guide 5461 and the second light guide 5462 are connected by glue, the incident surface of the first light guide 5461 and the incident surface of the second light guide 5462 are connected by glue, and the first exit surface of the first light guide 5461 and the second exit surface of the second light guide 5462 are connected by glue.

[0159] Collimated light is incident perpendicularly on the incident surface of the first light guide 5461 and the incident surface of the second light guide 5462, propagates within each of the first light guide 5461 and the second light guide 5462, and is refracted and split at the first exit surface of the first light guide 5461 and the second exit surface of the second light guide 5462. After being split by the first exit surface of the first light guide 5461 and the second exit surface of the second light guide 5462, the two beams of collimated light each include collimated light of the first specific wavelength and collimated light of the second specific wavelength, with the power ratio of the two collimated light beams being 1:1.

[0160] The incident surface of the first light guide 5461, the bottom surface of the first light guide 5461, and the first exit surface of the first light guide 5461 are connected in sequence to form a triangular prism. Similarly, the incident surface of the second light guide 5462, the bottom surface of the second light guide 5462, and the second exit surface of the second light guide 5462 are connected in sequence to form a triangular prism.

[0161] When the first light guide 5461 and the second light guide 5462 are both triangular prisms, the light splitter 546 occupies a large space, but the cavity space surrounded by the tube base 510 and the tube cap 520 is limited. Therefore, the first light guide 5461 and the second light guide 5462 are both designed as trapezoidal prisms.

[0162] The incident surface of the first light guide 5461 and the incident surface of the second light guide 5462 are connected by glue to form the incident surface of the light splitter 546 , and the first exit surface of the first light guide 5461 and the second exit surface of the second light guide 5462 are connected by glue to form the exit surface of the light splitter 546 .

[0163] In some embodiments, the material of the first light guide 5461 is silicon material, and the first angle -α is -103° to -93°, that is, the angle -β between the first exit surface of the first light guide 5461 and the incident surface of the first light guide 5461 is -13° to -3°.

[0164] The second light guide member 5462 is made of silicon, and the second angle α is 93° to 103°, that is, the angle β between the second exit surface of the second light guide member 5462 and the incident surface of the second light guide member 5462 is 3° to 13°.

[0165] In some embodiments, the material of the first light guide 5461 is glass material, and the first angle -α is -115° to -95°, that is, the angle -β between the first exit surface of the first light guide 5461 and the incident surface of the first light guide 5461 is -25° to -5°.

[0166] The second light guide member 5462 is made of glass, and the second angle α is 95° to 115°, that is, the angle β between the second exit surface of the second light guide member 5462 and the incident surface of the second light guide member 5462 is 5° to 25°.

[0167] In some embodiments, the light splitter 546 is an integrally formed structure, and the light splitter 546 includes an incident surface and two exit surfaces, and the two exit surfaces are connected.

[0168] FIG19 is a light path diagram of another light receiving component provided according to some embodiments of the present disclosure. As shown in FIG19 , in some embodiments, a beam of data light is collimated by a collimating lens 504, the collimated light is split into two beams of collimated light by a beam splitter 546, the two beams of collimated light are respectively converged by a focusing lens 547, one converged beam of light is filtered by a first filter 561, and the other converged beam of light is filtered by a second filter 562. The converged light of a first specific wavelength is received by a first photodetector 570, and the converged light of a second specific wavelength is received by a second photodetector 580.

[0169] In the above embodiment, the spectrometer 546 is fixed in the cavity surrounded by the tube cap 520 and the tube base 510 by a first fixing member, the focusing lens 547 is fixed in the cavity surrounded by the tube cap 520 and the tube base 510 by a second fixing member, and the first filter 561 and the second filter 562 are respectively fixed in the cavity surrounded by the tube cap 520 and the tube base 510 by a third fixing member.

[0170] In other embodiments, the first light shaping assembly may include a Fresnel lens and a splitting prism (also known as a beam splitter). The second light signal is a parallel beam; the Fresnel lens converts the second light signal from a parallel beam into a converging beam; the plane of the splitting prism faces the Fresnel lens, and the beam splitting surface of the splitting prism faces the tube holder, and the beam splitting surface splits the converged second light signal into a first sub-beam and a second sub-beam.

[0171] FIG20 is a cross-sectional view of another optical receiving component provided according to some embodiments of the present disclosure, and FIG21 is an optical path diagram of another optical receiving component provided according to some embodiments of the present disclosure. As shown in FIG20 and FIG21, with the optical axis of the second signal light as the reference line, the angle between the optical axis of the first sub-beam and the reference line is θ, and the angle between the optical axis of the second sub-beam and the reference line is -θ. In other words, the angle between the optical axis of the first sub-beam and the reference line is the same as the angle between the optical axis of the second sub-beam and the reference line, but in opposite directions.

[0172] In some embodiments of the present disclosure, the angle between the optical axis of the first sub-beam and the reference line is greater than or equal to 10°, and the angle between the optical axis of the first sub-beam and the reference line is less than or equal to 35°.

[0173] In some embodiments of the present disclosure, the first light shaping assembly 540 includes a Fresnel lens 541 and a splitting prism 542. The optical surface of the Fresnel lens 541 faces the splitting prism 542 and is in contact with the surface of the splitting prism 542. One surface of the splitting prism 542 is flat, and this surface is in contact with the optical surface of the Fresnel lens 541. The center of the other surface of the splitting prism 542 is recessed toward the interior of the splitting prism 542, forming a triangular shape. The surface of the splitting prism 542 facing the Fresnel lens 541 is flat, and the other surface of the splitting prism 542 is a beam splitting surface. This beam splitting surface splits the second optical signal into a first sub-beam and a second sub-beam with different emission angles.

[0174] The split prism 542 and the optical surface of the Fresnel lens 541 can be fixed together by optical glue.

[0175] The Fresnel lens 541 converges the second light signal, and the converged second light signal enters the plane of the splitting prism 542. The splitting surface of the splitting prism 542 then splits the second light signal into a first sub-beam and a second sub-beam with different emission angles.

[0176] The two ends of the splitting surface of the splitting prism 542 extend away from the plane compared to the central axis to form an inverted triangle, so that the first sub-beam is directed away from the central axis, the second sub-beam is directed away from the central axis, and the emission angles of the first sub-beam and the second sub-beam are opposite.

[0177] Figure 22 is a light path diagram of a splitting prism provided according to some embodiments of the present disclosure. To reduce the distance between the splitting prism and the optoelectronic component, the first and second sub-beams are refracted in opposite directions on the splitting surface. The splitting surface of the splitting prism 542 includes a first splitting region 5421 and a second splitting region 5422. The first splitting region 5421 refracts the incident second light signal to form a first sub-beam, while the second splitting region 5422 refracts the incident second light signal to form a second sub-beam.

[0178] The first light splitting area 5421 and the second light splitting area 5422 are symmetrically arranged along the central axis of the splitting prism, so the inclination angles of the two beams of convergent light emitted through the splitting prism are the same (the inclination angle of the convergent light refers to the angle γ between the convergent light and the central axis of the splitting prism).

[0179] If the inclination angle of the two converging beams emitted by the splitting prism is small, it is difficult to separate the two converging beams emitted by the splitting prism. If the inclination angle of the two converging beams emitted by the splitting prism is large, the converging beams emitted by the splitting prism are easy to separate, but the distance between the two beams is large and cannot meet the requirements of the cavity size enclosed by the receiving tube base and the receiving tube cap. In order to separate the two converging beams emitted by the splitting prism while meeting the requirements of the cavity size enclosed by the receiving tube base and the receiving tube cap, in some embodiments, the inclination angles γ and -γ of the two converging beams emitted by the splitting prism are both 10° to 30°.

[0180] The included angle between the surface of the first light-splitting region 5421 and the surface of the second light-splitting region 5422 is greater than 90°, and the included angle between the surface of the first light-splitting region 5421 and the surface of the second light-splitting region 5422 is less than 180°.

[0181] Because the materials of the splitting prisms are different, the refractive index of the splitting prisms is also different. In order to ensure that the inclination angles of the two beams of convergent light emitted by the splitting prism are both 10° to 30°, in some embodiments, when the material of the splitting prism is glass, the angle α between the first splitting area 5421 and the central axis is greater than or equal to 80°, and the angle α between the first splitting area 5421 and the central axis is less than or equal to 87°. The angle between the second splitting area 5422 and the central axis is greater than or equal to 80°, and the angle between the second splitting area 5422 and the central axis is less than or equal to 87°. The angle between the first splitting area 5421 and the central axis is the same as the angle between the second splitting area 5422 and the central axis. Therefore, the angle between the surface of the first splitting area 5421 and the surface of the second splitting area 5422 is less than or equal to 174°, and the angle between the surface of the first splitting area 5421 and the surface of the second splitting area 5422 is greater than or equal to 160°.

[0182] The above configuration ensures that the first and second sub-beams are emitted from the beam splitting surface of the splitting prism 542 in a direction away from the central axis of the splitting prism 542 , thereby preventing the first and second sub-beams from intersecting.

[0183] The angle between the central axis of the first sub-beam and the central axis of the second signal light is 10° to 30°. Exemplarily, the angle between the central axis of the first sub-beam and the central axis of the second signal light is 14°.

[0184] FIG23 is a light path diagram of another optical receiving component provided according to some embodiments of the present disclosure. In some embodiments of the present disclosure, when a collimator is not present in the optical fiber adapter, the first light shaping assembly may further include a collimating lens 543. The collimating lens 543 is disposed at the through-hole of the tube cap, and the Fresnel lens 541 and the splitting prism 542 are disposed within the light receiving space. After the optical fiber adapter transmits signal light, which is collimated by the collimating lens, it enters the Fresnel lens 541 and the splitting prism 542. The Fresnel lens 541 converges the second optical signal, and the converged second optical signal enters the plane of the splitting prism 542. The second optical signal is then split by the splitting surface of the splitting prism 542 into a first sub-beam and a second sub-beam with different emission angles, and both the first sub-beam and the second sub-beam are converging beams.

[0185] FIG24 is a structural diagram of another Fresnel lens and a splitting prism provided according to some embodiments of the present disclosure, and FIG25 is a light path diagram of the light receiving component corresponding to FIG24 . In some embodiments of the present disclosure, the splitting surface of the splitting prism 542 can be an obtuse triangle or an acute triangle. In some embodiments, when the material of the splitting prism 542 is glass, the angle α between the first splitting area 5421 and the central axis is greater than or equal to 95°, and the angle α between the first splitting area 5421 and the central axis is less than or equal to 115°. The angle between the second splitting area 5422 and the central axis is greater than or equal to 95°, and the angle between the second splitting area 5422 and the central axis is less than or equal to 115°. The angle between the first splitting area 5421 and the central axis is the same as the angle between the second splitting area 5422 and the central axis. In this way, the first sub-beam and the second sub-beam cross after being emitted from the splitting surface of the splitting prism 542.

[0186] As shown in Figure 25, the first and second light-splitting regions 5421 and 5422 are symmetrically arranged along the central axis of the splitting prism 542. The two beams of converging light emitted from the splitting prism are then cross-emitted. The first sub-beam is a converging beam. After being refracted by the first light-splitting region 5421, the first sub-beam is emitted to the second filter 562. It is then filtered by the second filter 562 and emitted to the photosensitive surface of the second photodetector 580. The second sub-beam is a converging beam. After being refracted by the second light-splitting region 5422, the second sub-beam is emitted to the first filter 561. It is then filtered by the first filter 561 and emitted to the photosensitive surface of the second photodetector 580.

[0187] The central axis of the first filter 561 is parallel to the central axis of the second filter 562 , and the central axis of the first filter 561 is parallel to the central axis of the split prism, and the central axis of the second filter 562 is parallel to the central axis of the split prism.

[0188] Therefore, the central axis of the first filter 561, the central axis of the second filter 562, the central axis of the splitter prism, and the central axis of the Fresnel lens 541 are all arranged in parallel. In some embodiments provided herein, the central axes of the first filter 561, the second filter 562, the splitter prism 542, and the Fresnel lens 541 are all perpendicular to the surface of the tube holder 510, eliminating the need for different angles, which helps improve the coupling accuracy of the optical module.

[0189] Therefore, in some embodiments of the present disclosure, the normal to the photosensitive surface of the first photodetector 570, the normal to the photosensitive surface of the second photodetector 580, the central axis of the first filter 561, the central axis of the second filter 562, and the central axis of the first light shaping assembly 540 are all arranged in parallel. In some embodiments provided by the present disclosure, the normal to the photosensitive surface of the first photodetector 570, the normal to the photosensitive surface of the second photodetector 580, the first filter 561, the second filter 562, and the central axis of the first light shaping assembly 540 are all perpendicular to the surface of the tube holder 510, eliminating the need for different angles, which helps improve the coupling accuracy of the optical module.

[0190] To increase the optical communication rate, the second optical signal includes at least two wavelengths of signal light. The optical receiving component 500 splits the signal light of different wavelengths according to their wavelengths and converts the optical signals into electrical signals. A collimator is provided within the first optical fiber adapter, and the second optical signal emitted by the optical fiber adapter is a collimated beam.

[0191] In some embodiments of the present disclosure, the second optical signal includes signal light of one or more wavelengths, where the number of signal lights included in the second optical signal can be 2, 3, 4, or other values. The following description uses the example of the second optical signal including signal lights of four different wavelengths.

[0192] In some embodiments of the present disclosure, the second optical signal includes a first signal light with a wavelength of λ1, a second signal light with a wavelength of λ2, a third signal light with a wavelength of λ3, and a fourth signal light with a wavelength of λ4.

[0193] For ease of illustration, as shown in the figure, the X axis represents the length of the optical module, the Y axis represents the thickness of the optical module, and the Z axis represents the width. The second optical signal emitted by the first optical fiber adapter 710 is transmitted along the length of the optical module.

[0194] In some embodiments, the second light shaping component includes a beam splitter, a focusing lens, and a reflective component. The beam splitter splits the second optical signal into a first graded beam (also known as a first sub-beam), a second graded beam (also known as a second sub-beam), a third graded beam (also known as a third sub-beam), and a fourth graded beam (also known as a fourth sub-beam); the focusing lens is located on the light output path of the beam splitter and converges the first graded beam, the second graded beam, the third graded beam, and the fourth graded beam; and the reflective component receives the converged first graded beam, the second graded beam, the third graded beam, and the fourth graded beam and changes the direction of the first graded beam, the second graded beam, the third graded beam, and the fourth graded beam.

[0195] In some examples, the beam splitting component includes a beam splitting prism and a diffraction beam splitter, that is, the second light shaping component includes a beam splitting prism and a diffraction beam splitting component.

[0196] FIG26 is a schematic diagram of the optical path of another optical receiving component provided according to some embodiments of the present disclosure, and FIG27 is a schematic diagram of the optical path of another optical receiving component provided according to some embodiments of the present disclosure from another angle.

[0197] As shown in Figures 26 and 27, the beam splitter 551 splits the second optical signal into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam are two beams of light with the same power but different angles, and both the first sub-beam and the second sub-beam are collimated beams.

[0198] The type of the signal light carried by the first sub-beam is the same as the type of the signal light carried by the second optical signal, and the type of the signal light carried by the second sub-beam is the same as the type of the signal light carried by the second optical signal.

[0199] The diffraction beam splitting component 552 receives the first and second sub-beams. The first sub-beam is fractionally diffracted into two collimated beams of ±1 order, and the second sub-beam is fractionally diffracted into two collimated beams of ±1 order. The first sub-beam is fractionally diffracted into a first fractional beam and a second fractional beam, and the first and second fractional beams are converted into converging beams. The second sub-beam is fractionally diffracted into a third fractional beam and a fourth fractional beam, and the third and fourth fractional beams are converted into converging beams.

[0200] In some embodiments of the present disclosure, the diffraction spectroscopic component 552 includes: a diffraction beam splitter 5521 and a first focusing lens 5522. The diffraction beam splitter 5521 is located between the spectroscopic prism 551 and the first focusing lens 5522. The diffraction beam splitter 5521 diffracts the first sub-beam into a first graded beam and a second graded beam. The diffraction beam splitter 5521 diffracts the second sub-beam into a third graded beam and a fourth graded beam. At this time, the first graded beam, the second graded beam, the third graded beam and the fourth graded beam are collimated beams.

[0201] The diffraction beam splitter 5521 and the first focusing lens 5522 can be provided separately (as shown in FIG27 ), or can be provided as an integral structure, or the diffraction beam splitter 5521 and the first focusing lens 5522 can be contact-connected. In some embodiments of the present disclosure, the diffraction beam splitter 5521 and the first focusing lens 5522 can be connected by optical adhesive.

[0202] The reflective component 553 converts the received light from a direction parallel to the circuit board to a direction perpendicular to the circuit board, and the converted light is directed toward the photosensitive surface of the optoelectronic component 590. The optoelectronic component 590 can be one or more photodetectors.

[0203] In the optical module provided herein, the beam splitter 551 splits the second optical signal into a first sub-beam and a second sub-beam. The first and second sub-beams are two beams of light with the same power but different angles, and both are collimated beams. The first and second sub-beams are then diffracted and fractionated by the diffraction beam splitter component 552 into a first fractionated beam, a second fractionated beam, a third fractionated beam, and a fourth fractionated beam. The diffracted and fractionated beams are then reflected by the reflector component 553 to the photodetector.

[0204] In the optical module of the present disclosure, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the beam splitter prism, and the central axis of the diffraction beam splitter assembly 552 are all arranged parallel to each other. In some embodiments of the present disclosure, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the beam splitter prism, and the central axis of the diffraction beam splitter assembly 552 are all arranged parallel to the length of the optical module, eliminating the need for angle adjustment, which helps improve light coupling accuracy and facilitates installation.

[0205] FIG28 is a schematic diagram of the optical path of another beam splitter prism provided according to some embodiments of the present disclosure. As shown in FIG28 , one side of the beam splitter prism 551 is a plane, which faces the first fiber optic adapter 710. The center of the other side of the beam splitter prism 551 protrudes toward the outside of the beam splitter prism 551, forming a triangular shape. The side of the beam splitter prism 551 facing the first fiber optic adapter 710 is a first mirror surface, and the other side of the beam splitter prism 551 is a beam splitting surface. This beam splitting surface splits the second optical signal into a first sub-beam and a second sub-beam with different emission angles. The plane of the beam splitter prism 551 is perpendicular to the second optical signal to prevent refraction of light when entering the beam splitter prism, which would affect the optical path.

[0206] The light splitting surface includes a first light splitting area 5511 and a second light splitting area 5512 , wherein the first light splitting area 5511 refracts the incident second light signal to form a first sub-beam; the second light splitting area 5512 refracts the incident second light signal to form a second sub-beam.

[0207] The angle between the surface of the first light-splitting area 5511 and the reference line is α, and the angle between the surface of the second light-splitting area 5512 and the reference line is -α.

[0208] As shown in Figure 28, with the optical axis of the first signal light as the reference line, the angle between the optical axis of the first sub-beam and the reference line is γ, and the angle between the optical axis of the second sub-beam and the reference line is -γ. In other words, the angles between the optical axis of the first sub-beam and the reference line are the same, but in opposite directions.

[0209] In some embodiments of the present disclosure, the angle between the optical axis of the first sub-beam and the reference line is greater than or equal to 10°, and the angle between the optical axis of the first sub-beam and the reference line is less than or equal to 35°. For example, the angle between the central axis of the first sub-beam and the central axis of the first signal light is 16.3°. The first sub-beam and the second sub-beam intersect before entering the diffraction beam splitting component.

[0210] In some embodiments, when the light-splitting prism is made of glass, the angle α between the first light-splitting region 5511 and the central axis is greater than or equal to 95°, and the angle α between the first light-splitting region 5511 and the central axis is less than or equal to 115°. The angle between the second light-splitting region 5512 and the central axis is greater than or equal to 95°, and the angle between the second light-splitting region 5512 and the central axis is less than or equal to 115°. The angle between the first light-splitting region 5511 and the central axis is the same as the angle between the second light-splitting region 5512 and the central axis.

[0211] In some embodiments of the present disclosure, the beam splitter prism 551 may be an integral structure, or a combination of two triangular prisms or two trapezoidal prisms.

[0212] FIG29 is a schematic diagram of the optical path of another spectroscopic prism provided according to some embodiments of the present disclosure. As shown in FIG29 , the angle α between the first spectroscopic region 5511 and the central axis is greater than or equal to 80°, and the angle α between the first spectroscopic region 5511 and the central axis is less than or equal to 87°. The angle between the second spectroscopic region 5512 and the central axis is greater than or equal to 80°, and the angle between the second spectroscopic region 5512 and the central axis is less than or equal to 87°. The angle between the first spectroscopic region 5511 and the central axis is the same as the angle between the second spectroscopic region 5512 and the central axis. Therefore, the angle between the surface of the first spectroscopic region 5511 and the surface of the second spectroscopic region 5512 is less than or equal to 174°, and the angle between the surface of the first spectroscopic region 5511 and the surface of the second spectroscopic region 5512 is greater than or equal to 160°.

[0213] In some embodiments of the present disclosure, the angle between the optical axis of the first sub-beam and the reference line is greater than or equal to 10°, and the angle between the optical axis of the first sub-beam and the reference line is less than or equal to 35°. For example, the angle between the central axis of the first sub-beam and the central axis of the first signal light is 16.3°. The first sub-beam and the second sub-beam do not intersect before entering the diffraction beam splitting component.

[0214] The diffraction beam splitter 5521 can be an integral diffraction beam splitter lens or two diffraction beam splitter lenses. The diffraction beam splitter 5521 includes a first diffraction beam splitter lens and a second diffraction beam splitter lens. The first diffraction beam splitter lens is located in the optical path of the first sub-beam, and the first diffraction beam splitter lens diffracts the first sub-beam into a first fractional beam and a second fractional beam. The second diffraction beam splitter lens is located in the optical path of the second sub-beam, and the second diffraction beam splitter lens diffracts the second sub-beam into a third fractional beam and a fourth fractional beam. For ease of installation, in some disclosed embodiments, the diffraction beam splitter is an integral diffraction beam splitter lens.

[0215] In some embodiments of the present disclosure, the first focusing lens 5522 can be a single lens or a plurality of lenses. For example, the first focusing lens 5522 can be four identical lenses, which respectively converge the first fractional beam, the second fractional beam, the third fractional beam, and the fourth fractional beam.

[0216] In some embodiments of the present disclosure, the first focusing lens 5522 can be a plano-convex lens, with one surface being flat and the other being convex. When the diffraction beam splitter 5521 and the first focusing lens 5522 are separately provided, the convex surface of the plano-convex lens can face either the diffraction beam splitter 5521 or the reflective assembly 553. When the diffraction beam splitter 5521 and the first focusing lens 5522 are glued together, the convex surface of the plano-convex lens faces the reflective assembly 553 for ease of installation.

[0217] The first focusing lens 5522 can also be a Fresnel lens. One surface of the Fresnel lens is flat, and the other surface is concentric. When the diffraction beam splitter 5521 and the first focusing lens 5522 are separately provided, the concentric circles of the Fresnel lens can face the diffraction beam splitter 5521 or the reflective assembly 553. When the diffraction beam splitter 5521 and the first focusing lens 5522 are glued together, the concentric circles of the Fresnel lens face the reflective assembly 553 for ease of installation.

[0218] Figure 30 is a cross-sectional schematic diagram of another optical receiving component and circuit board according to some embodiments of the present disclosure. As shown in Figure 30, the optical module provided by the present disclosure also includes a filter assembly 560, which is disposed between the reflective assembly 553 and the optoelectronic assembly. The filter assembly filters the multiple wavelengths of light in the graded light beam.

[0219] In some embodiments of the present disclosure, the angle between the reflective surface of the reflective assembly 553 and the second optical signal is 45°, so that the directions of the first, second, third, and fourth graded optical beams are converted to be perpendicular to the second optical signal. The photosensitive surface of the optoelectronic assembly faces upward from the circuit board, enabling reception of optical signals and facilitating installation of the photodetector.

[0220] The photodetector is installed in the receiving groove, which reduces the distance between the upper surface of the photodetector and the upper surface of the circuit board, shortens the bonding wire between the upper surface of the photodetector and the upper surface of the circuit board, and improves the stability of the optical module.

[0221] The projection of the reflective component 553 on the circuit board covers the photosensitive surface of the optoelectronic component.

[0222] The optoelectronic assembly 590 includes a first photodetector 570 , a second photodetector 580 , a third photodetector 591 , and a fourth photodetector 592 .

[0223] In the optical receiving component provided in the present application, the spectroscopic prism 551 divides the second optical signal into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam are two beams of light with the same power but different angles, and the first sub-beam and the second sub-beam are both collimated beams. The first sub-beam and the second sub-beam are then diffracted and graded into a first graded beam, a second graded beam, a third graded beam, and a fourth graded beam by the diffraction spectroscopic component 552. The diffracted and graded beams are reflected to the filter component by the reflection component 553, and are transmitted to the optoelectronic component after filtering. In the optical module disclosed in the present invention, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the spectroscopic prism, and the central axis of the diffraction spectroscopic component 552 are all arranged parallel to each other. It is only necessary to install and fix the different optical components in position, and there is no need to set angles between them, thereby improving the optical coupling accuracy. The optical components include but are not limited to the first optical fiber adapter, the spectroscopic prism, the diffraction spectroscopic component, the filter component, and the optoelectronic component. In some embodiments of the present disclosure, the central axis of the light outlet of the first fiber optic adapter 710, the central axis of the beam splitter prism, and the central axis of the diffraction beam splitter assembly 552 are all arranged parallel to the length of the optical module. The filter assembly can be arranged parallel to the circuit board and does not need to be installed at other angles.

[0224] In some embodiments of the present disclosure, the second optical signal may further include signal light of eight wavelengths, and the diffraction beam splitter diffracts and fractionates the two sub-beams into four fractionated beams. The corresponding number of photodetectors and filters is also set to eight. The remaining structures are the same as those in the embodiments disclosed herein and are not further described here.

[0225] The optical transmitter assembly includes a transmitter baffle and a transmitter housing. The two housings are joined together to form a space called a transmitter cavity. The transmitter baffle projects light from the housing from above. A third opening is defined on one side of the housing, through which the circuit board is inserted into the transmitter cavity. Another side of the housing has a through hole, into which the second fiber optic adapter is inserted.

[0226] The circuit board extends into the cavity through the third opening. The circuit board is plated with metal traces. The electrical devices in the emitting cavity are electrically connected to the corresponding metal traces by bonding to achieve electrical connection between the optical devices in the cavity and the circuit board.

[0227] The emission cavity is provided with: a second focusing lens, a diffraction light combiner, a turning prism assembly, a collimating lens assembly and a light emission assembly.

[0228] The optical transmitter assembly includes four optical transmitter chips, each of which emits signal light of a different wavelength. The collimating lens assembly is located in the optical output path of the optical transmitter assembly and converts the divergent light emitted by the optical transmitter chip into collimated light. The turning prism assembly is located between the diffraction combiner and the collimating lens assembly and is used to adjust the angle of the turned light. The diffraction combiner diffracts and combines the four beams of light to form a single beam of signal light, called a collimated beam. The second focusing lens is located between the diffraction combiner and the second fiber optic adapter and converts the collimated beam into a converging beam. The converging light spot is located on the optical surface of the second fiber optic adapter.

[0229] The light emitting assembly includes a first light emitting chip, a second light emitting chip, a third light emitting chip and a fourth light emitting chip. The wavelengths of light emitted by the first light emitting chip, the second light emitting chip, the third light emitting chip and the fourth light emitting chip are different from each other.

[0230] The collimating lens assembly includes a first collimating lens, a second collimating lens, a third collimating lens, and a fourth collimating lens. The first collimating lens is located in the light-emitting path of the first light-emitting chip and collimates the light emitted by the first light-emitting chip. The second collimating lens is located in the light-emitting path of the second light-emitting chip and collimates the light emitted by the second light-emitting chip. The third collimating lens is located in the light-emitting path of the third light-emitting chip and collimates the light emitted by the third light-emitting chip. The fourth collimating lens is located in the light-emitting path of the fourth light-emitting chip and collimates the light emitted by the fourth light-emitting chip.

[0231] In some embodiments of the present disclosure, the convex surface of each collimating lens in the collimating lens assembly may face the light emitting chip and may also face the turning prism assembly.

[0232] The turning prism assembly includes a first turning prism 441, a second turning prism 442, a third turning prism 443, and a fourth turning prism 444. The first turning prism 441 is located on the light-emitting path of the first collimating lens and adjusts the angle of light emitted by the first light-emitting chip. The second turning prism 442 is located on the light-emitting path of the second collimating lens and adjusts the angle of light transmitted by the second collimating lens. The third turning prism 443 is located on the light-emitting path of the third collimating lens and adjusts the angle of light transmitted by the third collimating lens. The fourth turning prism 444 is located on the light-emitting path of the fourth collimating lens and adjusts the angle of light transmitted by the fourth collimating lens.

[0233] In some embodiments of the present disclosure, the distance between the central axis of the first turning prism 441 and the central axis of the collimated light beam is equal to the distance between the central axis of the fourth turning prism 444 and the central axis of the collimated light beam. The distance between the central axis of the second turning prism 442 and the central axis of the collimated light beam is equal to the distance between the central axis of the third turning prism 443 and the central axis of the collimated light beam.

[0234] Figure 31 is a schematic diagram of the optical path of a first turning prism according to some embodiments of the present disclosure. As shown in Figure 31 , the first turning prism 441 has an inclined surface on one side and a vertical surface on the other. The vertical surface of the first turning prism 441 is perpendicular to the X-axis, and the angle δ1 between the inclined surface and the vertical surface is -5.94°. After passing through the first turning prism 441, the angle β1 between the light and the X-axis is -15°.

[0235] Figure 32 is a schematic diagram of the optical path of a second turning prism according to some embodiments of the present disclosure. As shown in Figure 32, the second turning prism 442 has an inclined surface on one side and a vertical surface on the other. The vertical surface of the second turning prism 442 is perpendicular to the X-axis, and the angle δ2 between the inclined surface and the vertical surface is -2.98°. After passing through the second turning prism 442, the angle β2 between the light and the X-axis is -7.44°.

[0236] Figure 33 is a schematic diagram of the optical path of a third turning prism provided according to some embodiments of the present disclosure. As shown in Figure 33 , the third turning prism 443 has an inclined surface on one side and a vertical surface on the other. The vertical surface of the third turning prism 443 is perpendicular to the X-axis, and the angle δ3 between the inclined surface and the vertical surface is 2.98°. After passing through the third turning prism 443, the angle β3 between the light and the X-axis is 7.44°.

[0237] Figure 34 is a schematic diagram of the optical path of a fourth turning prism provided according to some embodiments of the present disclosure. As shown in Figure 34 , the fourth turning prism 444 has an inclined surface on one side and a vertical surface on the other. The vertical surface of the fourth turning prism 444 is perpendicular to the X-axis, and the angle δ4 between the inclined surface and the vertical surface is 5.94°. After passing through the fourth turning prism 444, the angle β4 between the light and the X-axis is 15°.

[0238] In some embodiments of the present disclosure, the distance between the central axis of the second collimating lens and the central axis of the third collimating lens can be set to 1.36 mm; the centerline of the second and third collimating lenses coincides with the central axis of the diffractive light combiner. The distance between the central axis of the first and fourth collimating lenses can be set to 2.8 mm; the centerline of the first and fourth collimating lenses coincides with the central axis of the diffractive light combiner.

[0239] In some embodiments of the present disclosure, the inclined surface of the turning prism is disposed toward the collimating lens assembly. In other embodiments, the inclined surface of the turning prism can be disposed toward the diffraction light combiner 480, and the tilt angle of each turning prism and the distance between each prism can be adjusted.

[0240] Figure 35 is a schematic diagram of the structure of another optical receiving component and circuit board provided according to some embodiments of the present disclosure. Figure 36 is an optical path diagram of another optical receiving component provided according to some embodiments of the present disclosure. Figure 37 is an optical path diagram of another optical receiving component provided according to some embodiments of the present disclosure at another angle. Referring to Figures 35 and 36, in some other examples, the circuit board 300 has a through hole 302, and the first optical fiber adapter 710 is located at the through hole 302. The surface of the circuit board 300 has a receiving groove 303, and the upper surface of the receiving groove 303 is lower than the upper surface of the circuit board 300, so that the optical axis of the optical receiving component and the optical axis of the optical fiber adapter are in the same plane. The optical receiving component 500 is located in the receiving groove 303, receives the first optical signal in the first optical fiber adapter 710, and converts it into an electrical signal.

[0241] One end of the receiving groove 303 has an opening that communicates with the through hole 302. To achieve optical coupling between the first optical fiber adapter 710 and the light receiving component 500, the first optical fiber adapter 710 can be disposed above the receiving groove 303, or the first optical fiber adapter 710 can be disposed in the through hole 302.

[0242] The light splitting component is a diffraction beam splitter. That is, the light receiving component 500 includes a diffraction beam splitter lens 554 (also called a diffraction beam splitter), a focusing lens 555, an optoelectronic component 590, and a reflective component 556 (for example, including a reflector 5563). The diffraction beam splitter lens 554 performs fractional diffraction on the second light signal, splitting the second light signal into a first sub-beam, a second sub-beam, a third sub-beam, and a fourth sub-beam. The first sub-beam, the second sub-beam, the third sub-beam, and the fourth sub-beam have the same power but different angles, and are all collimated beams.

[0243] In other embodiments of the present disclosure, the diffraction spectroscopic lens 554 may further diffract the second optical signal in a graded manner to generate two sub-beams, or the diffraction spectroscopic lens 554 may further diffract the second optical signal in a graded manner to generate eight sub-beams, or the diffraction spectroscopic lens 554 may further diffract the second optical signal in a graded manner to generate sixteen sub-beams. The number of sub-beams after graded diffraction by the diffraction spectroscopic lens 554 may be set according to the number of wavelengths contained in the second optical signal. The number of sub-beams after graded diffraction by the diffraction spectroscopic lens 554 is greater than or equal to the number of wavelengths contained in the second optical signal. For example, if the second optical signal includes signal light of eight different wavelengths, the number of sub-beams after graded diffraction by the diffraction spectroscopic lens 554 is eight. For example, if the second optical signal includes signal light of five different wavelengths, the number of sub-beams after graded diffraction by the diffraction spectroscopic lens 554 is eight. For example, if the second optical signal includes signal light of two different wavelengths, the number of sub-beams after graded diffraction by the diffraction spectroscopic lens 554 is two.

[0244] The type of signal light carried by the first sub-beam is the same as the type of signal light carried by the second optical signal, the type of signal light carried by the second sub-beam is the same as the type of signal light carried by the second optical signal, the type of signal light carried by the third sub-beam is the same as the type of signal light carried by the second optical signal, and the type of signal light carried by the fourth sub-beam is the same as the type of signal light carried by the second optical signal.

[0245] The focusing lens 555 receives the first sub-beam, the second sub-beam, the third sub-beam, and the fourth sub-beam, and converts the first sub-beam, the second sub-beam, the third sub-beam, and the fourth sub-beam into converging beams.

[0246] The diffraction beam splitter lens 554 and the focusing lens 555 can be provided separately (as shown in FIG37 ), or can be provided as an integrated structure, or the diffraction beam splitter lens 554 and the focusing lens 555 can be contact-connected. In some embodiments of the present disclosure, the diffraction beam splitter lens 554 and the focusing lens 555 can be connected by optical adhesive.

[0247] In some embodiments of the present disclosure, the focusing lens 555 may be a plano-convex lens, the convex surface of the plano-convex lens may face the diffraction beam splitter lens 554 , and the convex surface of the plano-convex lens may also face the reflective component 556 .

[0248] In some embodiments of the present disclosure, the focusing lens 555 may also be a Fresnel lens, wherein one side of the Fresnel lens is a light surface and the other side is a concentric circular surface. The concentric circular surface of the Fresnel lens may face the diffraction beam splitter lens 554, and the concentric circular surface of the Fresnel lens may also face the reflective assembly 556.

[0249] The reflective component 556 converts the received light from being parallel to the circuit board to being perpendicular to the circuit board, and the converted light is directed toward the photosensitive surface of the optoelectronic component 590. The optoelectronic component 590 may be one or more photodetectors.

[0250] In the optical module provided by the present disclosure, the diffraction spectrometer lens 554 diffracts the second optical signal into a first sub-beam, a second sub-beam, a third sub-beam, and a fourth sub-beam. The first sub-beam, the second sub-beam, the third sub-beam, and the fourth sub-beam are beams of equal power but different angles, and the first sub-beam, the second sub-beam, the third sub-beam, and the fourth sub-beam are all collimated beams. The sub-beams are then focused by the focusing lens 555. The focused sub-beams are reflected to the photodetector by the reflection component 556. In the optical module of the present disclosure, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the splitting prism, and the central axis of the diffraction spectrometer component are all arranged parallel to each other. In some embodiments of the present disclosure, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the diffraction spectrometer lens 554, and the central axis of the focusing lens are all arranged parallel to the length direction of the optical module.

[0251] The present application discloses an optical module, comprising: an optical fiber adapter, the second optical signal emitted by the optical fiber adapter comprising signal lights of at least two different wavelengths; a diffraction beam splitter lens, located on the light-emitting side of the optical fiber adapter; the second optical signal is split into at least two collimated sub-beams after passing through the diffraction beam splitter lens; a focusing lens, located on the light-emitting path of the diffraction beam splitter lens, converging the first and second sub-beams; a reflector, receiving the converged first and second sub-beams and redirecting them; a first filter, converting the redirected first sub-beam into light of a single wavelength; a first photodetector, the photosensitive surface of which faces the first filter; a second filter, converting the redirected second sub-beam into light of a single wavelength; and a second photodetector, the photosensitive surface of which faces the second filter. In the optical module provided by the present application, the diffraction beam splitter lens diffracts the second optical signal into multiple sub-beams, which are then converted into a focused beam by the focusing lens. The reflector redirects the focused beam toward the photodetector. The converged signal light changes its transmission direction through the reflective component, thus achieving folding of the light path in space, reducing the projection range of the light receiving component on the upper surface of the circuit board, and reducing the space of the circuit board occupied by the light receiving component.

[0252] Figure 38 is a cross-sectional view of another optical receiving component and circuit board according to some embodiments of the present disclosure. As shown in Figure 38, the optical module provided by the present disclosure also includes a filter assembly 560, which is disposed between the reflective assembly 556 and the optoelectronic assembly 590. The filter assembly 560 filters the multiple wavelengths of light in the graded light beam.

[0253] In some embodiments of the present disclosure, the reflective surface of the reflective assembly 556 is at an angle of 45° to the second optical signal, such that the directions of the first, second, third, and fourth sub-beams are perpendicular to the second optical signal. The photosensitive surface of the optoelectronic assembly faces upward from the circuit board, enabling reception of optical signals and facilitating installation of the photodetector.

[0254] The photodetector is mounted within the receiving groove, reducing the distance between the top surface of the photodetector and the top surface of the circuit board. This shortens the bonding wire between the top surface of the photodetector and the top surface of the circuit board, improving the stability of the optical module. The projection of the reflective assembly 556 onto the circuit board covers the photosensitive surface of the photoelectric assembly. The photoelectric assembly includes a first photodetector 531, a second photodetector 532, a third photodetector 533, and a fourth photodetector 534.

[0255] FIG39 is a structural diagram of another reflective assembly provided according to some embodiments of the present disclosure. As shown in FIG39 , reflective assembly 556 includes a first arm 5561, a second arm 5562, and a reflector 5563. One end of first arm 5561 is connected to circuit board 300, and the other end is connected to reflector 5563. One end of second arm 5562 is connected to circuit board 300, and the other end is connected to reflector 5563.

[0256] In some embodiments of the present disclosure, the reflective assembly 556 can be an integrally formed structure or a split structure. An integral reflective assembly is beneficial for improving the light coupling accuracy and is easy to install.

[0257] Correspondingly, reflector 5563 is positioned above the first photodetector to reflect the first signal light having a wavelength of λ1 toward the photosensitive surface of the first photodetector. The normal to reflector 5563 is located at the bisector of the angle between the normal to focusing lens 555 and the normal to the photosensitive surface of first photodetector 531.

[0258] In some embodiments of the present disclosure, the first arm 5561 is perpendicular to the upper surface of the circuit board, and the angle between the reflector 5563 and the first arm 5561 is 45 degrees. The second arm 5562 is perpendicular to the upper surface of the circuit board, and the angle between the reflector 5563 and the second arm 5562 is 45 degrees.

[0259] Reflector 5563 is positioned above first photodetector 570, second photodetector 580, third photodetector 591, and fourth photodetector 592. The distance between reflector 5563 and first photodetector 570 plus the distance between reflector 5563 and focusing lens 555 equals the focal length of focusing lens 555.

[0260] In some embodiments of the present disclosure, the reflective assembly 556 may also be a plurality of independent reflectors, which are connected to the circuit board via connectors.

[0261] In the optical receiving component provided in the present application, the diffraction beam splitter lens 554 splits the second optical signal into a first sub-beam, a second sub-beam, a third sub-beam, and a fourth sub-beam. The diffraction-graded sub-beams are reflected to the filter assembly via the focusing lens and the reflective assembly 556, and then transmitted to the photodetector after filtering. In the optical module disclosed herein, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the diffraction beam splitter lens 554, and the central axis of the focusing lens 555 are aligned. Only the different optical components need to be mounted and fixed in position, and no angles need to be set between them, thereby improving the accuracy of optical coupling. The optical components include but are not limited to the first optical fiber adapter, a splitting prism, a diffraction beam splitter assembly, a filter assembly, and an optoelectronic assembly. In some embodiments of the present disclosure, the central axis of the light outlet of the first optical fiber adapter 710, the central axis of the splitting prism, and the central axis of the diffraction beam splitter assembly are all arranged parallel to the length of the optical module. The filter assembly can be arranged parallel to the circuit board and does not require installation at other angles.

[0262] In the second light shaping assembly, the filtering assembly 560 includes a first filter, a second filter, a third filter, and a fourth filter. After being reflected by a reflective assembly (in some examples, the reflective assembly may be a mirror), the first, second, third, and fourth fractional light beams each contain signal light of four different wavelengths. The first filter transmits the first signal light at wavelength λ1 and reflects light of other wavelengths. The second filter transmits the second signal light at wavelength λ2 and reflects light of other wavelengths. The third filter transmits the third signal light at wavelength λ3 and reflects light of other wavelengths. The fourth filter transmits the fourth signal light at wavelength λ4 and reflects light of other wavelengths.

[0263] In some embodiments of the present disclosure, the projection of the first filter on the circuit board 300 covers the photosensitive surface of the first photodetector 570, and the projection of the second filter on the circuit board 300 covers the photosensitive surface of the second photodetector 580. The area of ​​the first filter is larger than the area of ​​the photosensitive surface of the first photodetector 570, and the area of ​​the second filter is larger than the area of ​​the photosensitive surface of the second photodetector 580. The distance between the first filter and the circuit board 300 is equal to the distance between the second filter and the circuit board 300.

[0264] The projection of the third filter on the circuit board 300 covers the photosensitive surface of the third photodetector 591, and the projection of the fourth filter on the circuit board 300 covers the photosensitive surface of the fourth photodetector 592. The area of ​​the third filter is larger than the photosensitive surface of the third photodetector 591, and the area of ​​the fourth filter is larger than the photosensitive surface of the fourth photodetector 592. The distance between the third filter and the circuit board 300 is equal to the distance between the fourth filter and the circuit board 300.

[0265] It should be noted that the fixing method of the first filter, the second filter, the third filter and the fourth filter can refer to the structure shown in FIG11 , which will not be described in detail here.

[0266] To facilitate installation and improve coupling accuracy, the second baffle can be connected to the third baffle; or the structure for securing the first and second filters and the structure for securing the third and fourth filters can be integrally formed. In some embodiments of the present disclosure, the second optical signal can also include signal light of eight wavelengths, and the diffraction beam splitter diffracts and fractionates the two sub-beams into four fractional beams. The number of corresponding photodetectors and filters is also set to eight. The remaining structures are the same as those in the embodiments disclosed in this application and will not be detailed here.

Claims

1. An optical module, comprising: a first light shaping component or a second light shaping component; A filter component, located on the light output path of the first light shaping component or the second light shaping component; as well as A photoelectric component, wherein the photosensitive surface of the photoelectric component faces the filter component; The first light shaping component converts the second optical signal into a first sub-beam and a second sub-beam; the first sub-beam and the second sub-beam both contain a first signal light and a second signal light, the wavelength of the first signal light is different from the wavelength of the second signal light, and the central axis of the first light shaping component coincides with the bisector of the angle between the first sub-beam and the second sub-beam; The first light shaping component comprises: a beam splitter and a focusing lens; the second light signal is a collimated light beam, the focusing lens is located on the light output path of the beam splitter, the beam splitter splits the second light signal into the first sub-beam and the second sub-beam; the first sub-beam and the second sub-beam are converted into convergent beams after passing through the focusing lens; the central axes of the beam splitter and the focusing lens are in a straight line; The second light shaping component comprises: A beam splitter component and a focusing lens, wherein the beam splitter component splits the second optical signal into a first graded beam, a second graded beam, a third graded beam, and a fourth graded beam; the focusing lens focuses the first graded beam, the second graded beam, the third graded beam, and the fourth graded beam; the first graded beam, the second graded beam, the third graded beam, and the fourth graded beam each contain signal light of at least two wavelengths; The reflective component is located on the light output path of the light splitting component, and changes the directions of the first segmented light beam, the second segmented light beam, the third segmented light beam and the fourth segmented light beam.

2. The optical module according to claim 1, wherein: In the case where the first light shaping component comprises a focusing lens and a beam splitter, the beam splitter is a diffractive beam splitter, which splits the second optical signal into two parallel light beams.

3. The optical module according to claim 1 or 2, wherein: The angle between the first sub-beam and the central axis of the first light shaping component is greater than or equal to 10°, and the angle between the first sub-beam and the central axis of the first light shaping component is less than or equal to 35°; An included angle between the second sub-beam and the central axis of the first light shaping component is greater than or equal to 10°, and an included angle between the second sub-beam and the central axis of the first light shaping component is less than or equal to 35°.

4. The optical module according to claim 2, wherein: When the beam splitter is a beam splitter, the two collimated lights after the beam splitting are cross-overlapped before being received by the focusing lens; The first filter is located between the focusing lens and the first light receiving chip, and is used to filter light so that the first light receiving chip receives the converged light of the first specific wavelength; The second filter is located between the focusing lens and the second light receiving chip, and is used for filtering light so that the second light receiving chip receives the converged light of the second specific wavelength.

5. The optical module according to claim 4, wherein: The beam splitter includes an incident surface, a first exit surface and a second exit surface, the first exit surface and the second exit surface are not parallel to the incident surface, and the angle between the first exit surface and the central axis of the beam splitter is different from the angle between the second exit surface and the central axis of the beam splitter, so that the angles of the two beams of collimated light split after refraction by the first exit surface and the second exit surface are different.

6. The optical module according to claim 5, wherein: The first emitting surface and the second emitting surface are symmetrically arranged along the central axis of the beam splitter, so that the two beams of collimated light after beam splitting are symmetrically arranged along the central axis of the beam splitter.

7. The optical module according to claim 6, wherein: The angle between the first exit surface of the beam splitter and the central axis of the beam splitter is a first angle, the angle between the second exit surface of the beam splitter and the central axis of the beam splitter is a second angle, and the first angle and the second angle are symmetrically arranged along the central axis of the beam splitter.

8. The optical module according to claim 7, wherein: The beam splitter is made of glass material, and the first angle is 95° to 115°; the beam splitter is made of silicon material, and the first angle is 93° to 103°.

9. The optical module according to claim 4, wherein: The focusing lens is a plano-convex lens, and the vertical distance between the focusing lens and the first filter and the second filter is 0.5 mm; Alternatively, the focusing lens is a Fresnel lens, and a vertical distance between the focusing lens and the first filter and the second filter is 1.1 mm.

10. The optical module according to claim 5, wherein: The light splitting element comprises: A first light guide, comprising the first emitting surface; The second light guide is connected to the first light guide and is symmetrically arranged with the first light guide along the central axis of the light splitter, and the light guide includes the second emitting surface.

11. The optical module according to claim 1, wherein: The light splitting component comprises: A beam splitter prism, which splits the second optical signal into a first sub-beam and a second sub-beam, wherein one side of the beam splitter prism is a plane, the other side of the beam splitter prism is a beam splitting surface, and the plane faces the optical fiber adapter of the optical module; a diffraction beam splitter, wherein the diffraction beam splitter is located between the beam splitting prism and the focusing lens; The diffraction beam splitter fractionally diffracts the first sub-beam into a first fractional beam and a second fractional beam; the diffraction beam splitter fractionally diffracts the second sub-beam into a third fractional beam and a fourth fractional beam.

12. The optical module according to claim 11, wherein: The plane of the beam splitter prism is perpendicular to the second optical signal; The light splitting surface of the light splitting prism includes: a first light splitting area and a second light splitting area; The first light splitting region is not parallel to the plane of the light splitting prism, The second light splitting region is not parallel to the plane of the light splitting prism.

13. The optical module according to claim 12, wherein: The included angle between the first light splitting area and the second light signal is 95° to 115°; the included angle between the second light splitting area and the second light signal is 95° to 115°; the first sub-beam and the second sub-beam cross before entering the diffraction beam splitter.

14. The optical module according to claim 12, wherein: The included angle between the first light splitting area and the second light signal is 80° to 87°; the included angle between the second light splitting area and the second light signal is 80° to 87°; The first sub-beam and the second sub-beam do not cross each other before entering the diffraction beam splitter.

15. The optical module according to any one of claims 11 to 14, wherein: The diffraction beam splitter is in contact with the focusing lens; Wherein, the focusing lens is a plano-convex lens, one side of which is a plane and the other side is a convex surface; the plane of the focusing lens faces the diffraction beam splitter; or, The focusing lens is a Fresnel lens, one side of which is a plane and the other side is a concentric circular surface; the plane of the focusing lens faces the diffraction beam splitter.

16. The optical module according to claim 1, wherein: The light splitting component comprises: A diffraction beam splitter, wherein the second optical signal is divided into a first fractional beam, a second fractional beam, a third fractional beam and a fourth fractional beam after passing through the diffraction beam splitter.

17. An optical module, comprising: Pipe socket; A tube cap is buckled on the tube base to enclose a light receiving space with the tube base, wherein the tube cap has a through hole; a first light shaping component, located at the through hole, the first light shaping component converting the second light signal into a first sub-beam and a second sub-beam, wherein the second light signal, the first sub-beam and the second sub-beam all contain signal lights of two different wavelengths, and the first sub-beam and the second sub-beam are both converging beams, and the second light signal is a parallel beam; The first light shaping component comprises: A Fresnel lens converts the second optical signal from a parallel light beam into a converging light beam; A splitting prism, wherein the plane of the splitting prism faces the Fresnel lens, the splitting surface of the splitting prism faces the tube holder, and the splitting surface splits the converged second light signal into two beams; the central axis of the Fresnel lens and the splitting prism are in a straight line, and the first sub-beam crosses or separates from the second sub-beam.

18. The optical module according to claim 17, wherein: The splitting surface of the splitting prism includes a first splitting area and a second splitting area; The angle between the first light-splitting area and the central axis is greater than or equal to 80°, and the angle α between the first light-splitting area and the central axis is less than or equal to 87°; the angle between the second light-splitting area and the central axis is greater than or equal to 80°, and the angle between the second light-splitting area and the central axis is less than or equal to 87°, so that after the first sub-beam and the second sub-beam are emitted from the light-splitting surface of the splitting prism, they are both emitted in a direction away from the central axis of the splitting prism.

19. The optical module according to claim 17, wherein: The splitting surface of the splitting prism includes a first splitting area and a second splitting area; The angle between the first light-splitting area and the central axis is greater than or equal to 95°, and the angle between the first light-splitting area 5421 and the central axis is less than or equal to 115°; the angle between the second light-splitting area and the central axis is greater than or equal to 95°, and the angle between the second light-splitting area and the central axis is less than or equal to 115°, so that the first sub-beam and the second sub-beam cross after being emitted from the light-splitting surface of the splitting prism.

Images