An optical module

Abstract

The application provides an optical module, comprising: a circuit board; an optical transceiver assembly electrically connected to the circuit board, the optical transceiver assembly comprising an optical receiving device for receiving a first wavelength optical signal and a second wavelength optical signal; the optical receiving device comprising: a socket, a first optical receiving chip and a second optical receiving chip being arranged on a top surface of the socket, the first optical receiving chip being used for receiving the first wavelength optical signal, and the second optical receiving chip being used for receiving the second wavelength optical signal; a cap, the bottom of the cap being connected to the socket and covering the socket, and the cap and the socket forming a sealed cavity; and an optical assembly support, the bottom of the optical assembly support being connected to the cap and covering the cap, and an optical assembly being arranged in the optical assembly support, the optical assembly being used for splitting and transmitting the first wavelength optical signal and the second wavelength optical signal to the first optical receiving chip and the second optical receiving chip. The optical module provided by the application effectively reduces the size of the multi-channel optical transceiver assembly and facilitates the miniaturization of the optical module.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber communication technology, and in particular to an optical module. BACKGROUND

[0002] With the development of new business and application mode such as cloud computing, mobile Internet, video, etc., the development and progress of optical communication technology becomes increasingly important. In optical communication technology, the optical module is a tool for converting optical signals and electrical signals, and is one of the key devices in optical communication equipment. With the development of optical communication technology, the transmission rate of the optical module is continuously improved. Generally, high transmission rate optical modules have high integration density compared with low transmission rate optical modules. For example, more optical transmitter devices and optical receiver devices are concentrated in the optical module by using multi-channel optical transceiver technology.

[0003] The BOSA (Bi-Directional Optical Sub-Assembly) packaging structure is a packaging form of high transmission rate optical modules. The traditional BOSA includes a light emitting TO, a light receiving TO, an optical assembly, and a fiber adapter. The optical signal generated by the light emitting TO is transmitted to the fiber adapter through the optical assembly, and the optical signal input through the fiber adapter is transmitted to the light receiving TO through the optical assembly. For optical modules using multiple channels, multiple light emitting TOs and multiple light receiving TOs need to be set to realize the emission and reception of multiple different wavelength optical signals.

[0004] When multiple light emitting TOs and multiple light receiving TOs are set in the BOSA, the overall size of the BOSA will be relatively large, and thus the volume ratio of the BOSA in the optical module will increase, which limits the development of the miniaturization of the optical module. SUMMARY

[0005] The embodiments of the present application provide an optical module for reducing the size of a multi-channel optical transceiver assembly and facilitating the development of the miniaturization of the optical module.

[0006] The optical module provided by the present application comprises:

[0007] a circuit board;

[0008] an optical transceiver assembly electrically connected to the circuit board, the optical transceiver assembly comprising an optical receiving device, the optical receiving device being configured to receive a first wavelength optical signal and a second wavelength optical signal;

[0009] The optical receiving device comprises:

[0010] a socket, a first optical receiving chip and a second optical receiving chip being arranged on a top surface of the socket, the first optical receiving chip being configured to receive the first wavelength optical signal, and the second optical receiving chip being configured to receive the second wavelength optical signal;

[0011] a cap connected to the base and covering the base, forming a sealed cavity with the base;

[0012] an optical component holder connected to the cap and covering the cap, having a light passing hole and a receiving cavity inside the receiving cavity in communication with the light passing hole, a combined light including a first wavelength light signal and a second wavelength light signal entering the receiving cavity through the light passing hole;

[0013] an optical component disposed in the receiving cavity, including a first filter and a second filter, the first filter transmitting the first wavelength light signal and reflecting the second wavelength light signal to the second filter, the second filter reflecting the second wavelength light signal, so that the first wavelength light signal and the second wavelength light signal are split and transmitted to the sealed cavity.

[0014] In the optical module provided by the present application, the base is provided with a first light receiving chip and a second light receiving chip, the cap covers the base and forms a sealed cavity with the base, the cap is provided with an optical component holder covering the cap and internally provided with an optical component, the optical component includes a first filter and a second filter, the first filter transmits a first wavelength light signal and reflects a second wavelength light signal to the second filter, and the second filter reflects the second wavelength light signal, thereby realizing splitting of the first wavelength light signal and the second wavelength light signal. Therefore, a combined light signal including the first wavelength light signal and the second wavelength light signal enters the receiving cavity of the optical component holder through the light passing hole of the optical component holder, and is split by the optical component in the optical component holder according to wavelength, and the split first wavelength light signal and second wavelength light signal are respectively transmitted into the sealed cavity formed by the cap and the base, and finally the first wavelength light signal is transmitted to the first light receiving chip and the second wavelength light signal is transmitted to the second light receiving chip. Therefore, the optical module provided by the present application realizes that one light receiving device can receive a light signal including a first wavelength light signal and a second wavelength light signal, which is equivalent to the light signal that can be received by two traditional light receiving devices, so that the light receiving device in the present application can effectively reduce the size of a multi-channel optical transceiver assembly and facilitate the miniaturization of the optical module. In addition, in the optical module provided by the present application, the multi-channel light receiving device only needs to be coupled once during production, thereby improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings needed to be used in some embodiments of the present disclosure. Obviously, the drawings in the following description are only some drawings of the embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size of the product, the actual process of the method, the actual time sequence of the signal, etc.

[0016] Figure 1 Connection diagram of optical communication system;

[0017] Figure 2 Structure diagram of optical network terminal;

[0018] Figure 3 Structure diagram of optical module according to some embodiments;

[0019] Figure 4 Exploded view of optical module according to some embodiments;

[0020] Figure 5 Structure diagram of optical receiving device according to some embodiments;

[0021] Figure 6 Exploded view of optical receiving chip according to some embodiments;

[0022] Figure 7 Use state diagram of pipe base according to some embodiments;

[0023] Figure 8 Structure diagram of pipe cap according to some embodiments;

[0024] Figure 9 Exploded view of optical assembly support and optical assembly according to some embodiments;

[0025] Figure 10 Perspective view of optical assembly support according to some embodiments;

[0026] Figure 11 Sectional view of optical assembly support according to some embodiments Figure 1 ;

[0027] Figure 12 Sectional view of optical assembly support according to some embodiments Figure 2 ;

[0028] Figure 13 Bottom view of optical assembly support according to some embodiments;

[0029] Figure 14 Use state diagram of optical assembly support according to some embodiments;

[0030] Figure 15 Use state sectional view of optical assembly support according to some embodiments;

[0031] Figure 16A structural diagram of another light receiving device according to some embodiments;

[0032] Figure 17 A cross-sectional view of a light receiving device according to some embodiments;

[0033] Figure 18 An exploded diagram of another light receiving device according to some embodiments;

[0034] Figure 19 A cross-sectional view of another light receiving device according to some embodiments;

[0035] Figure 20 A cross-sectional view of another pipe base in a state of use according to some embodiments; Figure 1 ;

[0036] Figure 21 An exploded diagram of another pipe base in a state of use according to some embodiments;

[0037] Figure 22 A cross-sectional view of a lens holder in a state of use according to some embodiments;

[0038] Figure 23 An exploded diagram of a lens holder in a state of use according to some embodiments;

[0039] Figure 24 A cross-sectional view of a lens holder according to some embodiments;

[0040] Figure 25 A cross-sectional view of another pipe base in a state of use according to some embodiments; Figure 2 ;

[0041] Figure 26 An exploded diagram of another light receiving device according to some embodiments;

[0042] Figure 27 A cross-sectional view of another light receiving device according to some embodiments;

[0043] Figure 28 A view of another pipe base in a state of use according to some embodiments;

[0044] Figure 29 An exploded diagram of another pipe base in a state of use according to some embodiments;

[0045] Figure 30 An exploded diagram of another lens holder in a state of use according to some embodiments;

[0046] Figure 31A sectional view of a lens holder according to some embodiments;

[0047] Figure 32 A structural schematic view of another lens holder according to some embodiments;

[0048] Figure 33 A sectional view of a pipe base in use according to some embodiments. DETAILED DESCRIPTION

[0049] The technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided in the present disclosure, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0050] In an optical communication system, optical signals are used to carry information to be transmitted, and the optical signals carrying information are transmitted to information processing devices such as computers through information transmission devices such as optical fibers or optical waveguides to complete the transmission of information. Because the transmission of light through optical fibers or optical waveguides has passive transmission characteristics, low-cost and low-loss information transmission can be achieved. In addition, the signals transmitted by information transmission devices such as optical fibers or optical waveguides are optical signals, and the signals that information processing devices such as computers can recognize and process are electrical signals. Therefore, in order to establish an information connection between information transmission devices such as optical fibers or optical waveguides and information processing devices such as computers, it is necessary to realize the mutual conversion between electrical signals and optical signals.

[0051] Optical modules realize the mutual conversion function between optical signals and electrical signals in the field of optical communication technology. The optical module includes an optical port and an electrical port. The optical module realizes optical communication with information transmission devices such as optical fibers or optical waveguides through the optical port, and realizes electrical connection with an optical network terminal (for example, an optical modem) through the electrical port. The electrical connection is mainly used for power supply, I2C signal transmission, data information transmission, and grounding, etc.; the optical network terminal transmits electrical signals to information processing devices such as computers through a network cable or wireless fidelity technology (Wi-Fi).

[0052] Figure 1 A connection relationship diagram of an optical communication system. As shown in Figure 1 , the optical communication system includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101, and a network cable 103.

[0053] One end of the optical fiber 101 is connected to the remote server 1000, and the other end is connected to the optical network terminal 100 through the optical module 200. The optical fiber itself can support long-distance signal transmission, for example, signal transmission of thousands of meters (6-8 kilometers), and theoretically, unlimited distance transmission can be achieved if a repeater is used. Therefore, in a general optical communication system, the distance between the remote server 1000 and the optical network terminal 100 can usually reach thousands of meters, tens of kilometers, or hundreds of kilometers.

[0054] One end of the network cable 103 is connected to the local information processing device 2000, and the other end is connected to the optical network terminal 100. The local information processing device 2000 can be any one or several of the following devices: a router, a switch, a computer, a mobile phone, a tablet computer, a television, etc.

[0055] The physical distance between the remote server 1000 and the optical network terminal 100 is greater than the physical distance between the local information processing device 2000 and the optical network terminal 100. The connection between the local information processing device 2000 and the remote server 1000 is completed by the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is completed by the optical module 200 and the optical network terminal 100.

[0056] The optical module 200 includes an optical port and an electrical port. The optical port is configured to access the optical fiber 101, so that the optical module 200 and the optical fiber 101 establish a bidirectional optical signal connection; the electrical port is configured to access the optical network terminal 100, so that the optical module 200 and the optical network terminal 100 establish a bidirectional electrical signal connection. The optical module 200 realizes the mutual conversion of optical signals and electrical signals, thereby establishing an information connection between the optical fiber 101 and the optical network terminal 100. For example, the optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input into the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and then input into the optical fiber 101. Since the optical module 200 is a tool for converting optical signals and electrical signals, it does not have the function of processing data, and in the above optical-electrical conversion process, the information does not change.

[0057] The optical network terminal 100 comprises a housing in the shape of a cuboid, and an optical module interface 102 and a network cable interface 104 arranged on the housing. The optical module interface 102 is configured to access the optical module 200, so that the optical network terminal 100 establishes a bidirectional electrical signal connection with the optical module 200; the network cable interface 104 is configured to access the network cable 103, so that the optical network terminal 100 establishes a bidirectional electrical signal connection with the network cable 103. The connection between the optical module 200 and the network cable 103 is established through the optical network terminal 100. For example, the optical network terminal 100 transmits electrical signals from the optical module 200 to the network cable 103, and transmits electrical signals from the network cable 103 to the optical module 200, so that the optical network terminal 100, as a host of the optical module 200, can monitor the operation of the optical module 200. The host of the optical module 200 can also include an optical line terminal (OLT) in addition to the optical network terminal 100.

[0058] The remote server 1000 establishes a bidirectional signal transmission channel with the local information processing device 2000 through the optical fiber 101, the optical module 200, the optical network terminal 100, and the network cable 103.

[0059] Figure 2 The figure is a structural diagram of the optical network terminal, and is used to clearly show the connection relationship between the optical module 200 and the optical network terminal 100. Figure 2 Only the structure of the optical network terminal 100 related to the optical module 200 is shown. As shown in the figure, Figure 2 The optical network terminal 100 further comprises a circuit board 105 arranged in the housing, a cage 106 arranged on the surface of the circuit board 105, a heat sink 107 arranged on the cage 106, and an electrical connector arranged inside the cage 106. The electrical connector is configured to access the electrical port of the optical module 200; the heat sink 107 has a fin or other protruding part that increases the heat dissipation area.

[0060] The optical module 200 is inserted into the cage 106 of the optical network terminal 100, and the optical module 200 is fixed by the cage 106. The heat generated by the optical module 200 is conducted to the cage 106, and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected to the electrical connector inside the cage 106, so that the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. In addition, the optical port of the optical module 200 is connected to the optical fiber 101, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101.

[0061] Figure 3 The figure is a structural diagram of an optical module provided according to some embodiments, Figure 4 The figure is an exploded schematic view of an optical module provided according to some embodiments. As shown in the figure,Figure 3 and 4 As shown in FIG. 2, the optical module 200 comprises a shell, a circuit board 206 and an optical transceiver assembly 207 arranged in the shell.

[0062] The shell comprises an upper shell 201 and a lower shell 202, the upper shell 201 covers the lower shell 202 to form the shell having two openings; the outer contour of the shell generally presents a square body.

[0063] In some embodiments of the present disclosure, the lower shell 202 comprises a bottom plate 2021 and two lower side plates 2022 arranged perpendicularly to the bottom plate 2021 on both sides of the bottom plate 2021; the upper shell 201 comprises a cover plate 2011, the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the shell.

[0064] In some embodiments, the lower shell 202 comprises a bottom plate 2021 and two lower side plates 2022 arranged perpendicularly to the bottom plate 2021 on both sides of the bottom plate 2021; the upper shell 201 comprises a cover plate 2011 and two upper side plates arranged perpendicularly to the cover plate 2011 on both sides of the cover plate 2011, the two upper side plates and the two lower side plates 2022 are combined to realize that the upper shell 201 covers the lower shell 202.

[0065] The direction of the line connecting the two openings 204 and 205 can be consistent with the length direction of the optical module 200, or can be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 (the right end of FIG. 2), and the opening 205 is also located at the end of the optical module 200 (the left end of FIG. 2). Alternatively, the opening 204 is located at the end of the optical module 200, and the opening 205 is located at the side of the optical module 200. The opening 204 is an electrical port, and the gold fingers of the circuit board 206 extend out of the electrical port 204 and are inserted into an upper computer (for example, an optical network terminal 100); the opening 205 is an optical port configured to access an external optical fiber 101, so that the external optical fiber 101 is connected to the optical transceiver assembly 207 inside the optical module 200. Figure 3 Figure 3 The assembly mode of combining the upper shell 201 and the lower shell 202 facilitates the installation of the circuit board 206, the optical transceiver assembly 207 and other devices into the shell, and the upper shell 201 and the lower shell 202 form a packaging protection for these devices. In addition, when assembling the circuit board 206, the optical transceiver assembly 207 and other devices, the positioning components, heat dissipation components and electromagnetic shielding components of these devices are facilitated to be deployed, which is beneficial to the automatic implementation of production.

[0066] In some embodiments, the upper shell 201 and the lower shell 202 are generally made of metal materials, which is beneficial to realize electromagnetic shielding and heat dissipation.

[0067] In some embodiments, the upper shell 201 and the lower shell 202 are generally made of metal materials, which is beneficial to realize electromagnetic shielding and heat dissipation.​

[0068] In some embodiments, the optical module 200 further comprises an unlocking component 203 located outside the shell of the optical module 200, which is configured to realize the fixed connection between the optical module 200 and the host machine, or to release the fixed connection between the optical module 200 and the host machine.

[0069] For example, the unlocking component 203 is located on the outer wall of the two lower side plates 2022 of the lower shell 202, and has a clamping component matched with the cage of the host machine (for example, the cage 106 of the optical network terminal 100). When the optical module 200 is inserted into the cage of the host machine, the clamping component of the unlocking component 203 fixes the optical module 200 in the cage of the host machine; when the unlocking component 203 is pulled, the clamping component of the unlocking component 203 moves, thereby changing the connection relationship between the clamping component and the host machine, so as to release the clamping relationship between the optical module 200 and the host machine, and thus the optical module 200 can be pulled out of the cage of the host machine.

[0070] The circuit board 206 comprises circuit traces, electronic components and chips, and the electronic components and chips are connected together according to the circuit design through the circuit traces to realize the functions of power supply, electrical signal transmission and grounding. The electronic components include, for example, capacitors, resistors, transistors, metal oxide semiconductor field effect transistors (MOSFETs). The chips include, for example, microcontroller units (MCUs), laser drive chips, limiting amplifiers, clock and data recovery (CDR) chips, power management chips, digital signal processing (DSP) chips.

[0071] The circuit board 206 is generally a hard circuit board, and the hard circuit board can also realize the bearing function due to its relatively hard material, for example, the hard circuit board can stably bear the above-mentioned electronic components and chips; the hard circuit board can also be inserted into the electrical connector in the cage of the host machine.

[0072] The circuit board 206 further comprises a gold finger formed on the surface of the end thereof, and the gold finger is composed of a plurality of pins independent of each other. The circuit board 206 is inserted into the cage 106, and the gold finger is in conductive connection with the electrical connector in the cage 106. The gold finger can be arranged only on the surface of one side of the circuit board 206 (for example, the surface of the lower side of the circuit board 206), or can be arranged on the surfaces of both sides of the circuit board 206 (for example, the surfaces of the upper side and the lower side of the circuit board 206). Figure 4The upper surface shown) can also be provided on the upper and lower surfaces of the circuit board 206 to accommodate occasions where the number of pins required is large. The gold finger is configured to establish an electrical connection with the host computer to achieve power supply, grounding, I2C signal transmission, data signal transmission, etc.

[0073] Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards as a supplement to rigid circuit boards. For example, a flexible circuit board can be used to connect the rigid circuit board and the optical transceiver assembly.

[0074] The optical transceiver assembly 207 includes an optical transmitting device 208 and an optical receiving device 300. The optical transmitting device 208 is configured to implement optical signal transmission, and the optical receiving device 300 is configured to implement optical signal reception. For example, the optical transmitting device 208 and the optical receiving device 300 are combined together to form an integrated optical transceiver assembly.

[0075] In some embodiments of the present application, the optical transmitting device 208 and the optical receiving device 300 are coaxially packaged. To facilitate the formation of an integrated optical transceiver assembly 207, the optical transceiver assembly 207 further includes a round square tube body 2071, and the optical transmitting device 208 and the optical receiving device 300 are arranged on the round square tube body 2071. The round square tube body 2071 is also connected to a fiber adapter, and an external optical fiber is connected through the fiber adapter. The optical signal emitted by the optical transmitting device 208 is transmitted into the round square tube body 2071 and then transmitted to the external optical fiber through the fiber adapter. The optical signal input through the external optical fiber is transmitted into the round square tube body 2071 through the fiber adapter and then transmitted to the optical receiving device.

[0076] The optical receiving device 300, which is usually coaxially packaged, can only receive optical signals of one wavelength. To enable the optical transceiver assembly 207 to receive optical signals of two or more wavelengths, two or more optical receiving devices 300 need to be arranged on the round square tube body 2071. In order to achieve the reception of optical signals of two or more wavelengths, a plurality of optical devices are arranged in the round square tube body 2071, and the optical signals are split according to the wavelengths by the optical devices, so that the optical signals are transmitted to the corresponding optical receiving devices 300 according to the wavelengths. When the number of optical receiving devices 300 is increased and optical devices are added in the round square tube body 2071, the size of the optical transceiver assembly 207 will be greatly increased, which cannot meet the requirements of miniaturization of optical modules.

[0077] To meet the needs of miniaturized optical modules, embodiments of the present application provide an optical receiver device 300 with a novel coaxial package structure. This optical receiver device 300 can receive optical signals of more than one wavelength, such as a first wavelength optical signal and a second wavelength optical signal. For example, the optical receiver device 300 is configured to receive a beam of light comprising the first wavelength optical signal and the second wavelength optical signal.

[0078] Figure 5 FIG. 1 is a schematic structural diagram of a light receiving device according to some embodiments. Figure 5 As shown, the optical receiving device 300 provided in the embodiment of the present application includes a tube base 310, a tube cap 320 and an optical component bracket 330. The tube cap 320 is covered on the top of the tube base 310 to form a sealed cavity with the tube base 310; the optical component bracket 330 is covered on the tube cap 320, and the interior of the optical component bracket 330 is used to set an optical component, which changes the transmission optical path of the optical signal according to the wavelength of the optical signal to achieve the splitting of optical signals of different wavelengths. A light hole 331 is provided on the optical component bracket 330, and the optical signal to be received enters the optical component bracket 330 through the light hole 331 and is then split by the optical component. For example, a light hole 331 is provided on the top of the optical component bracket 330, and the optical signal to be received by the optical receiving device 300 enters the optical component bracket 330 through the top of the optical component bracket 330.

[0079] A light receiving chip and other electrical components are mounted on the top of the socket 310. Several pins 311 are also provided on the socket 310. Wires are bonded to the light receiving chip and other electrical components mounted on the top of the socket 310. One end of the pins 311, away from the cap 320, is electrically connected to the circuit board 206 via a flexible circuit board.

[0080] In some embodiments, the outer contours of the tube base 310 and the tube cap 320 are generally circular. To facilitate the assembly of the optical component holder 330 and the tube cap 320 and to effectively control the volume of the optical component holder 330, the outer contour of the optical component holder 330 is also circular.

[0081] Figure 6 is an exploded schematic diagram of an optical receiving chip provided according to some embodiments. Figure 7 FIG. 1 is a diagram showing a state of use of a tube socket according to some embodiments. Figure 6 and 7As shown, the top of the tube base 310 is provided with a first light receiving chip 312 and a second light receiving chip 313, one end of the pin 311 penetrates the tube base 310 to extend into the sealed cavity formed by the tube base 310 and the tube cap 320, and the first light receiving chip 312 and the second light receiving chip 313 are wire-connected to the corresponding pin 311. In some embodiments, the first light receiving chip 312 and the second light receiving chip 313 are symmetrically arranged at the top of the tube base 310.

[0082] In some embodiments, the top of the tube base 310 is further provided with a first transimpedance amplifier 314 and a second transimpedance amplifier 315, the first transimpedance amplifier 314 is arranged on one side of the first light receiving chip 312, the second transimpedance amplifier 315 is arranged on one side of the second light receiving chip 313, the first transimpedance amplifier 314 and the second transimpedance amplifier 315 are wire-connected to the corresponding pin 311, and the first light receiving chip 312 is wire-connected to the first transimpedance amplifier 314, and the second light receiving chip 313 is wire-connected to the second transimpedance amplifier 315. For example, the first transimpedance amplifier 314 is arranged on the side of the first light receiving chip 312 away from the second light receiving chip 313, and the second transimpedance amplifier 315 is arranged on the side of the second light receiving chip 313 away from the first light receiving chip 312, and the first transimpedance amplifier 314 and the second transimpedance amplifier 315 are symmetrically arranged at the top of the tube base 310.

[0083] Further, the top of the tube base 310 is further provided with resistors and other devices, and the resistors can be used to form matching circuits and the like.

[0084] Figure 8 A structural schematic diagram of a tube cap according to some embodiments is shown. As shown, Figure 8 The tube cap 320 includes a tube cap body 321 and a flat window glass 322; the tube cap body 321 is provided with a third through hole 3211, and the flat window glass 322 is connected to the tube cap body 321 and seals the third through hole 3211; and the flat window glass 322 is used for passing optical signals. For example, the flat window glass 322 is arranged in the tube cap body 321, and the edge of the flat window glass 322 is connected to the inner side wall of the tube cap body 321, so as to facilitate the connection of the flat window glass 322 and the tube cap body 321.

[0085] Figure 9 An exploded schematic diagram of an optical assembly support and an optical assembly according to some embodiments is shown. As shown, Figure 9As shown, the optical assembly 340 disposed in the optical assembly bracket 330 includes several filters, such as a first filter 341 and a second filter 342. For example, the first filter 341 transmits the first wavelength optical signal and reflects the second wavelength optical signal to the second filter 342, while the second filter 342 reflects the second wavelength optical signal. Therefore, the first filter 341 and the second filter 342 cooperate to achieve splitting transmission of the first wavelength optical signal and the second wavelength optical signal, so that the first wavelength optical signal and the second wavelength optical signal are respectively transmitted to corresponding optical receiving chips. The optical assembly 340 is disposed in the optical assembly bracket 330, which can further facilitate optical coupling, reduce the difficulty of product assembly, and improve product assembly efficiency.

[0086] In some embodiments, the optical component 340 further includes a third filter 343 for filtering the second wavelength optical signal to ensure the cleanliness of the second wavelength optical signal reflected by the second filter 342, thereby ensuring the quality of the signal received by the corresponding optical receiving chip.

[0087] In the embodiment of the present application, the reflection or transmission parameters of the first filter 341 , the second filter 342 , and the third filter 343 are selected based on the wavelength of the optical signal that the optical receiving device 300 needs to receive.

[0088] Figure 10 is a three-dimensional diagram of an optical component bracket provided according to some embodiments, Figure 11 A cross-sectional view of an optical component support according to some embodiments Figure 1 .like Figure 10 and 11 As shown, an accommodating cavity 332 is provided inside the optical component bracket 330. The accommodating cavity 332 communicates with the light hole 331, and the optical signal transmitted through the light hole 331 is transmitted to the accommodating cavity 332. The optical component 340 is disposed in the accommodating cavity 332, which is used to facilitate the installation of various components in the optical component 340. In some embodiments, the accommodating cavity 332 is a cavity having a regular shape, such as a rectangular parallelepiped. A cavity having a regular shape, such as a rectangular parallelepiped, facilitates the installation of the optical component 340. However, the embodiments of the present application are not limited to cavities having regular shapes, such as rectangular parallelepipeds, and a cavity having a shape that combines a rectangular parallelepiped and a cylindrical shape can also be used.

[0089] like Figure 10 and 11As shown, a third fixing groove 333 is provided at the bottom of the optical component holder 330, and the third fixing groove 333 communicates with the accommodating cavity 332. The third fixing groove 333 is used to connect the optical component holder 330 to the tube cap 320, facilitating the connection between the optical component holder 330 and the tube cap 320. For example, the end of the tube cap 320 is embedded in the third fixing groove 333, and the top surface of the tube cap 320 is connected to the bottom surface of the third fixing groove 333, or the outer wall of the tube cap 320 is connected to the side wall of the third fixing groove 333. In some embodiments, the side wall of the third fixing groove 333 has a circular profile to facilitate mating with the tube cap 320.

[0090] Figure 12 A cross-sectional view of an optical component support according to some embodiments Figure 2 .like Figure 12 As shown, a first fixing slot 3321 is provided at the bottom of the receiving cavity 332. The first fixing slot 3321 is used to mount and secure the first optical filter 341. In some embodiments, the first fixing slot 3321 spans the bottom of the receiving cavity 332, and the end of the first optical filter 341 is positioned within the first fixing slot 3321. This allows the first optical filter 341 to span the bottom of the receiving cavity 332, facilitating the assembly of the first optical filter 341. The first optical filter 341 can be attached to the first fixing slot 3321 using glue. For example, three ends of the first optical filter 341 are positioned within the first fixing slot 3321. Of course, in this embodiment of the present application, opposite ends of the first optical filter 341 can also be positioned within the first fixing slot 3321. The bottom surface of the first fixing slot 3321 is tilted at a first predetermined angle to ensure that the first optical filter 341 is properly assembled. The first predetermined angle can be selected based on the assembly tilt of the first optical filter 341.

[0091] like Figure 12 As shown, a first fixing surface 3322 is provided at the top of the receiving cavity 332. The second fixing surface 3322 is used to mount and secure the second optical filter 342. In some embodiments, the second fixing surface 3322 is disposed on one side of the light passage 331. The second optical filter 342 can be attached to the second fixing surface 3322 using glue. The second fixing surface 3322 is tilted at a second predetermined angle to ensure that the second optical filter 342 is properly mounted. The second predetermined angle can be selected based on the desired mounting angle of the second optical filter 342.

[0092] like Figure 12As shown, the bottom of the accommodating through cavity 332 is provided with a second fixing groove 3323, which is arranged at one side of the first fixing groove 3321 and is used for assembling and fixing the third filter 343. In some embodiments, the second fixing groove 3323 is arranged across the bottom of the accommodating through cavity 332, and then the end of the third filter 343 is arranged in the second fixing groove 3323, so that the third filter 343 is arranged across the bottom of the accommodating through cavity 332, facilitating the assembly of the third filter 343. The third filter 343 can be connected to the second fixing groove 3323 by glue. For example, both ends of the third filter 343 are arranged in the second fixing groove 3323.

[0093] Figure 13 A bottom view of an optical assembly support according to some embodiments is provided. As shown Figure 13 As shown, the edge of the first fixing groove 3321 is provided with a plurality of first avoiding grooves 3324, the edge of the first avoiding groove 3324 is beyond the edge of the first fixing groove 3321, and the groove bottom surface of the first avoiding groove 3324 is lower than the groove bottom surface of the first fixing groove 3321. In the embodiments of the present application, in order to ensure the use effect of the first filter 341, it is necessary to ensure the installation accuracy of the first filter 341. However, the size of the first filter 341 is relatively small, and when the size of the first fixing groove 3321 is relatively large, although it is convenient for the assembly of the first filter 341, the installation accuracy of the first filter 341 cannot be ensured, so the size of the first fixing groove 3321 is usually matched with the first filter 341. However, when assembling the first filter 341, clamping tools are usually needed to clamp, and when the size of the first fixing groove 3321 is matched with the first filter 341, the clamping tools cannot be used. In the embodiments of the present application, the edge of the first fixing groove 3321 is provided with the first avoiding groove 3324, which is equivalent to increasing the size of the first fixing groove 3321 in some areas, so that the first avoiding groove 3324 is used for avoiding the clamping tool when the first filter 341 is fixed and assembled. On the other hand, the first filter 341 is usually connected to the first fixing groove 3321 by glue, and the first avoiding groove 3324 can be used for storing glue, which can effectively avoid the pollution of the effective optical surface of the first filter 341 when the first filter 341 is fixed by glue. For example, the edges of three sides of the first fixing groove 3321 are provided with the first avoiding groove 3324.

[0094] As shown Figure 13As shown, the edge of the second fixing groove 3323 is provided with a plurality of second avoiding grooves 3325, the edge of the second avoiding groove 3325 is beyond the edge of the second fixing groove 3323, and the groove bottom surface of the second avoiding groove 3325 is lower than the groove bottom surface of the second fixing groove 3323. The second avoiding groove 3325 is used for avoiding clamping tools when the third filter 343 is fixed and assembled, and is also used for storing glue, which can effectively avoid glue pollution of the third filter 343 when the third filter 343 is fixed by glue. For example, the two side edges of the second fixing groove 3323 are provided with the second avoiding groove 3325. The purpose of providing the second avoiding groove 3325 and the effect can be referred to the first avoiding groove 3324.

[0095] Figure 14 a use state diagram of an optical assembly support according to some embodiments, Figure 15 a use state sectional view of an optical assembly support according to some embodiments, Figure 14 and 15 shows an installation state of the optical assembly 340 in the optical assembly support 330. As shown in Figure 14 and 15 shown, the edge of the first filter 341 is arranged in the first fixing groove 3321, the second filter 342 is fixed on the second fixing surface 3322, and the edge of the third filter 343 is arranged in the second fixing groove 3323.

[0096] In the embodiment of the present application, the size of the optical assembly support 330 can be controlled to be less than 1 cm, and even can be controlled to be less than 5 mm, so that the size of the light receiving device 300 in the thickness direction is increased by less than 1 cm. By arranging the first filter 341, the second filter 342 and the like in the optical assembly support 330, the distance between the first light receiving chip 312 and the second light receiving chip 313 support in the coaxial packaging structure light receiving device 300 is reduced to 0.7 mm, so that the diameter of the light receiving device 300 is increased by less than 1 mm. Therefore, the light receiving device 300 provided by the present application can increase the number of light receiving chips in the light receiving device 300, and when used for receiving two wavelengths, the size of the light receiving device 300 changes less than the size of the original light receiving device for receiving one wavelength, so that more devices can be arranged in the limited small space of the light receiving device 300. Compared with some two light receiving devices used for receiving two wavelengths of optical signals, more optical devices are not needed to be arranged in the circular square tube body 2071 for beam splitting according to the wavelength of the light beam, so that the space of the optical transceiver assembly 207 is further saved.

[0097] As shown in Figure 16 and 15 shown, the side edge of the optical assembly support 330 is provided with a second positioning opening 334, which is used for assisting the installation and positioning of the optical assembly support 330.

[0098] Figure 16 FIG. 1 is a schematic structural diagram of another optical receiving device according to some embodiments. Figure 17 As shown, a first positioning hole 316 is provided on the side of the tube base 310. The first positioning hole 316 and the second positioning hole 334 are referenced to each other to achieve the installation and positioning of the optical component bracket 330. For example, the second positioning hole 334 is aligned with the first positioning hole 316 to achieve the installation and positioning of the optical component bracket 330, which facilitates passive assembly and improves assembly speed. In some embodiments, auxiliary tooling can be used to position the first positioning hole 316 and the second positioning hole 334 to ensure the installation and positioning of the optical component bracket 330.

[0099] Figure 17 is a cross-sectional view of a light receiving device according to some embodiments. Figure 17 The assembly relationship of each component in the optical receiving device 300 is shown in FIG. Figure 17 The transmission path of the optical signal is also shown. Figure 18 As shown, the optical signal (thick solid line) to be received by the optical receiving device 300, including the first wavelength optical signal and the second wavelength optical signal, passes through the light-through hole 331 and enters the accommodating cavity 332. The optical signal in the accommodating cavity 332 is transmitted to the first filter 341; the first wavelength optical signal (thin solid line) is transmitted through the first filter 341 to the sealed cavity of the tube base 310 and the tube cap 320, and then transmitted to the first optical receiving chip 312; the second wavelength optical signal (dashed line) is reflected by the first filter 341 and transmitted to the second filter 342, reflected by the second filter 342 to the third filter 343, transmitted through the third filter 343 to the sealed cavity of the tube base 310 and the tube cap 320, and then transmitted to the second optical receiving chip 313.

[0100] Figure 18 FIG. 1 is a schematic diagram of an exploded view of another optical receiving device according to some embodiments. Figure 18 As shown, in some embodiments, a first lens 317 and a second lens 318 are further disposed in the sealed cavity of the tube base 310 and the tube cap 320. The first lens 317 is disposed above the first optical receiving chip 312 and is used to converge and transmit a first wavelength optical signal to the first optical receiving chip 312, thereby improving the coupling efficiency of the first wavelength optical signal to the first optical receiving chip 312; the second lens 318 is disposed above the second optical receiving chip 313 and is used to converge and transmit a second wavelength optical signal to the second optical receiving chip 313, thereby improving the coupling efficiency of the second wavelength optical signal to the second optical receiving chip 313.

[0101] To facilitate the placement of the first lens 317 and the second lens 318, the optical receiver device 300 provided in the embodiments of the present application further includes a lens holder. The lens holder is fixed within the sealed cavity between the tube base 310 and the tube cap 320. The first lens 317 and the second lens 318 are disposed on the lens holder. In some embodiments, the lens holder can be fixedly connected to the tube cap 320. In some embodiments, the lens holder is fixedly connected to the tube base 310.

[0102] like Figure 18 As shown, the bottom of the lens holder 350 is connected to the top of the tube holder 310, and the first lens 317 and the second lens 318 are arranged on the lens holder 350, so that the first lens 317 is located above the first light receiving chip 312 and the second lens 318 is located above the second light receiving chip 313. The first lens 317 and the second lens 318 can be spherical lenses or aspherical lenses. Figure 19 318. As shown in FIG, both the first lens 317 and the second lens 318 are spherical lenses. When the first lens 317 and the second lens 318 are aspherical lenses, the thickness of the first lens 317 and the second lens 318 can be further reduced, thereby reducing the space occupied by the first lens 317 and the second lens 318.

[0103] Figure 19 is a cross-sectional view of another light receiving device according to some embodiments, Figure 19 The assembly relationship of each component in the optical receiving device 300 is shown in FIG. Figure 19 The transmission path of the optical signal is also shown. Figure 20 As shown, the optical signal to be received by the optical receiving device 300, including the first wavelength optical signal and the second wavelength optical signal (thick solid line), passes through the light-through hole 331 and enters the accommodating cavity 332. The optical signal in the accommodating cavity 332 is transmitted to the first filter 341; the first wavelength optical signal (thin solid line) is transmitted through the first filter 341 to the sealed cavity between the tube base 310 and the tube cap 320, and then transmitted to the first lens 317. It is converged by the first lens 317 and transmitted to the first optical receiving chip 312; the second wavelength optical signal (dashed line) is reflected by the first filter 341 and transmitted to the second filter 342. It is reflected by the second filter 342 to the third filter 343, and is transmitted through the third filter 343 to the sealed cavity between the tube base 310 and the tube cap 320. It is then transmitted to the second lens 318, and is converged by the second lens 318 and transmitted to the second optical receiving chip 313.

[0104] Figure 1 A cross-sectional view of another tube socket in use according to some embodiments Figure 21 , Figure 20 FIG1 is an exploded view of another type of tube socket in use according to some embodiments. Figure 22 and 21As shown, the bottom of the lens holder 350 is connected to the top of the pipe base 310 and is located between the first light receiving chip 312 and the second light receiving chip 313, and the bottom of the lens holder 350 is used to isolate the first light receiving chip 312 and the second light receiving chip 313. In this way, the lens holder 350 not only can support the first lens 317 and the second lens 318, but also can perform optical isolation between the first light receiving chip 312 and the second light receiving chip 313, effectively reducing the transmission of the first wavelength optical signal to the second light receiving chip 313 and the transmission of the second wavelength optical signal to the first light receiving chip 312, and facilitating to improve the signal receiving quality of the first light receiving chip 312 and the second light receiving chip 313.

[0105] Figure 22 A use state cross-sectional view of a lens holder is provided according to some embodiments. As shown in Figure 23 The lens holder 350 includes a base 351 and a support seat 352, the bottom of the base 351 is used to connect the top of the pipe base 310, the top of the base 351 supports and connects the support seat 352, and the support seat 352 is fixedly connected to the first lens 317 and the second lens 318. In order to facilitate to ensure the support stability of the base 351 to the first lens 317 and the second lens 318, the top of the base 351 is supported at the center of gravity of the support seat 352, and the first lens 317 and the second lens 318 are symmetrically arranged on the support seat 352; for example, the top of the base 351 is supported at the middle position of the support seat 352, and the first lens 317 and the second lens 318 are symmetrically arranged on the support seat 352.

[0106] Figure 24 A use state exploded view of a lens holder is provided according to some embodiments, Figure 23 A cross-sectional view of a lens holder is provided according to some embodiments. As shown in Figure 25 and 24 The support seat 352 is provided with a first through hole 353 and a second through hole 354, the bottom of the first lens 317 is embedded in the first through hole 353, and the bottom of the second lens 318 is embedded in the second through hole 354. For example, the first through hole 353 and the second through hole 354 are both circular through holes, which facilitate to stably support the first lens 317 and the second lens 318. In some embodiments, the first through hole 353 and the second through hole 354 are arranged on the support seat 352 in an axisymmetric manner.

[0107] In some embodiments, a first recessed groove 355 is disposed at the top of the first through-hole 353, and a second recessed groove 356 is disposed at the top of the second through-hole 354. The inner diameter of the first recessed groove 355 is larger than that of the first through-hole 353, and the inner diameter of the second recessed groove 356 is larger than that of the second through-hole 354. The first lens 317 is connected to the first recessed groove 355, and the second lens 318 is connected to the second recessed groove 356. This further ensures that the support base 352 can stably support the first lens 317 and the second lens 318. In some embodiments, the first lens 317 and the second lens 318 are fixed to the base 351 using glue. Therefore, the first recessed groove 355 and the second recessed groove 356 provide space for the adhesive to overflow, effectively preventing the glue from overflowing and contaminating the lenses or other devices.

[0108] Figure 2 A cross-sectional view of another tube socket in use according to some embodiments Figure 25 .like Figure 26 The illustrated base 351 is disposed between the first optical receiving chip 312 and the second optical receiving chip 313, i.e., the first optical receiving chip 312 and the second optical receiving chip 313 are disposed on either side of the base 351. The base 351 can effectively reduce crosstalk between the first wavelength optical signal and the second wavelength optical signal, i.e., reduce the transmission of the first wavelength optical signal to the second optical receiving chip 313 and the transmission of the second wavelength optical signal to the first optical receiving chip 312, thereby improving the quality of the signals received by the first and second optical receiving chips 312, 313. For example, the first and second optical receiving chips 312, 313 are disposed symmetrically on either side of the base 351.

[0109] In some embodiments, to ensure coupling efficiency of the first wavelength optical signal to the first optical receiving chip 312 and the second wavelength optical signal to the second optical receiving chip 313, the focal point of the first lens 317 is located on the photosensitive surface of the first optical receiving chip 312, and the focal point of the second lens 318 is located on the photosensitive surface of the second optical receiving chip 313. For example, the positions of the focal points of the first lens 317 and the second lens 318 can be adjusted by adjusting the height of the lens holder 350.

[0110] Figure 26 FIG. 1 is a schematic diagram of an exploded view of another optical receiving device according to some embodiments. Figure 18 As shown, in the optical receiving device 300 provided in this embodiment, a first lens 317 and a second lens 318 are also provided in the sealed cavity of the tube base 310 and the tube cap 320. The first lens 317 and the second lens 318 are provided above the first optical receiving chip 312 and the second optical receiving chip 313 through the lens holder 350. Figure 26 The light receiving device 300 shown in the figure, Figure 27The structure of the lens holder 350 shown in FIG is different. For example, the base 351 in the lens holder 350 includes a base body, a first baffle and a second baffle. The first baffle is connected to one end of the base body, and the second baffle is connected to the other end of the base body, so as to increase the connection support between the base 351 and the tube base 310, thereby improving the installation firmness of the lens holder 350 on the top of the tube base 310.

[0111] Figure 27 is a cross-sectional view of yet another optical receiving device according to some embodiments. Figure 27 The assembly relationship of each component in the optical receiving device 300 is shown in FIG. Figure 27 The transmission path of the optical signal is also shown. Figure 28 As shown, the optical signal to be received by the optical receiving device 300, including the first wavelength optical signal and the second wavelength optical signal (thick solid line), passes through the light-through hole 331 and enters the accommodating cavity 332. The optical signal in the accommodating cavity 332 is transmitted to the first filter 341; the first wavelength optical signal (thin solid line) is transmitted through the first filter 341 to the sealed cavity between the tube base 310 and the tube cap 320, and then transmitted to the first lens 317. It is converged by the first lens 317 and transmitted to the first optical receiving chip 312; the second wavelength optical signal (dashed line) is reflected by the first filter 341 and transmitted to the second filter 342. It is reflected by the second filter 342 to the third filter 343, and is transmitted through the third filter 343 to the sealed cavity between the tube base 310 and the tube cap 320. It is then transmitted to the second lens 318, and is converged by the second lens 318 and transmitted to the second optical receiving chip 313.

[0112] Figure 29 FIG. 1 is a diagram showing a usage state of another tube socket provided according to some embodiments. Figure 28 FIG. 1 is a schematic diagram of another type of tube socket in use according to some embodiments. Figure 30 and 29 As shown, the base 351 includes a base body 3511, a first baffle 3512, and a second baffle 3513. One end of the base body 3511 is connected to the first baffle 3512, and the other end of the base body 3511 is connected to the second baffle 3513. The tops of the base body 3511, the first baffle 3512, and the second baffle 3513 are connected to the support base 352, and the bottoms of the base body 3511, the first baffle 3512, and the second baffle 3513 are connected to the top of the tube base 310. The base body 3511, the first baffle 3512, and the second baffle 3513 form an "I" shape, which facilitates a more stable connection to the tube base 310 and more stably supports the first lens 317 and the second lens 318.

[0113] The first light receiving chip 312 is arranged on one side of the base body 3511, and the second light receiving chip 313 is arranged on the other side of the base body 3511; the first baffle 3512 and the second baffle 3513 are used to shield the optical signal from the direction perpendicular to the base body 3511, thereby further effectively reducing the transmission of the first wavelength optical signal to the second light receiving chip 313 and the transmission of the second wavelength optical signal to the first light receiving chip 312, improving the optical isolation effect between the first light receiving chip 312 and the second light receiving chip 313, and more conveniently improving the signal receiving quality of the first light receiving chip 312 and the second light receiving chip 313.

[0114] Figure 31 A use state exploded view of another lens holder according to some embodiments, Figure 30 A sectional view of another lens holder according to some embodiments. As shown in Figure 32 and 31 The base body 3511, the first baffle 3512 and the second baffle 3513 form a first shielding cavity on one side of the base body 3511, and form a second shielding cavity on the other side of the base body 3511; the first shielding cavity is used to accommodate the first light receiving chip 312, and the second shielding cavity is used to accommodate the second light receiving chip 313. The support seat 352 is provided with a first through hole 353 and a second through hole 354, the top of the first through hole 353 is provided with a first sink groove 355, and the top of the second through hole 354 is provided with a second sink groove 356; the inner diameter of the first sink groove 355 is greater than the inner diameter of the first through hole 353, and the inner diameter of the second sink groove 356 is greater than the inner diameter of the second through hole 354.

[0115] Figure 32 A structural schematic view of another lens holder according to some embodiments. As shown in Figure 33 In some embodiments, the first baffle 3512 located on the side of the first shielding cavity has a shorter extension length than the second baffle 3513, and the second baffle 3513 located on the side of the second shielding cavity has a shorter extension length than the first baffle 3512. In this way, the needs of connecting the pipe seat 310 to the base 351 and isolating the optical signal can be guaranteed, and the space occupied by the base 351 connecting the pipe seat 310 can be saved.

[0116] In some embodiments, the second baffle 3513 and the base body 3511 form a first shielding cavity on one side of the base body 3511, and the first baffle 3512 and the base body 3511 form a second shielding cavity on the other side of the base body 3511, i.e. the first baffle 3512 does not extend to one side of the base body 3511, and the second baffle 3513 does not extend to the other side of the base body 3511. In this way, the space occupied by the base 351 connecting the pipe seat 310 can be further saved.

[0117] Figure 33 Figure 16 is a use state sectional view of another pipe seat provided according to some embodiments. As shown, a first light receiving chip 312 is located in a first shielding cavity formed by a base body 3511, a first baffle 3512 and a second baffle 3513 on one side of the base body 3511, and a second light receiving chip 313 is located in a second shielding cavity formed by the base body 3511, the first baffle 3512 and the second baffle 3513 on the other side of the base body 3511, so as to further realize light isolation of the first light receiving chip 312 and the second light receiving chip 313 and ensure the quality of signals received by the first light receiving chip 312 and the second light receiving chip 313. ​

[0118] In the optical module provided by the present application, the first light receiving chip 312 and the second light receiving chip 313 are arranged on the pipe seat 310, the pipe cap 320 is arranged on the pipe seat 310 to form a sealed cavity with the pipe seat 310, and the optical component support 330 with the optical component 340 arranged inside is arranged on the pipe cap 320. Therefore, a bundle of optical signals including first wavelength optical signals and second wavelength optical signals is transmitted to the optical component support 330, is split by the optical component 340 in the optical component support 330 according to wavelengths, and the split first wavelength optical signals and second wavelength optical signals are respectively transmitted into the sealed cavity formed by the pipe cap 320 and the pipe seat 310, and finally the first wavelength optical signals are transmitted to the first light receiving chip 312 and the second wavelength optical signals are transmitted to the second light receiving chip 313.

[0119] In the optical module provided by the present application, one light receiving device can receive optical signals including first wavelength optical signals and second wavelength optical signals, which is equivalent to the optical signals that can be received by two conventional light receiving devices. Therefore, the light receiving device in the present application can effectively reduce the size of a multi-channel optical transceiver assembly, reserve more space for the optical module, and thus facilitate the miniaturization of the optical module. In addition, in the optical module provided by the present application, the light receiving device with multiple channels only needs to be coupled once during production, which can improve production efficiency.

[0120] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent substitutions for some technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.​

Claims

1. An optical module, characterized in that: include: circuit boards; an optical transceiver assembly electrically connected to the circuit board, the optical transceiver assembly comprising an optical receiving device configured to receive an optical signal of a first wavelength and an optical signal of a second wavelength; Wherein, the optical receiving device includes: The tube holder has a first light receiving chip and a second light receiving chip disposed on the top surface thereof, wherein the first light receiving chip is used to receive the first wavelength optical signal, and the second light receiving chip is used to receive the second wavelength optical signal; A pipe cap, the bottom of which is connected to the pipe base and is arranged above the pipe base to form a sealed cavity with the pipe base; An optical component bracket, the bottom of which is connected to the tube cap and is covered on the tube cap, the top of which is provided with a light hole, and the interior of which is provided with a receiving cavity communicated with the light hole, and the combined beam including the first wavelength optical signal and the second wavelength optical signal is incident on the receiving cavity through the light hole; an optical component, disposed in the accommodating cavity, comprising a first filter and a second filter, wherein the first filter transmits the first wavelength optical signal and reflects the second wavelength optical signal to the second filter, and the second filter reflects the second wavelength optical signal, so that the first wavelength optical signal and the second wavelength optical signal are split and transmitted to the sealed cavity; A lens holder, comprising a base and a support seat; the base comprises a base body, a first baffle and a second baffle, the first baffle being connected to one end of the base body and the second baffle being connected to the other end of the base body; the tops of the base body, the first baffle and the second baffle being connected to the support seat, and the bottoms of the base body, the first baffle and the second baffle being connected to the tube seat; the base body and the second baffle forming a first shielding cavity, so that the first light receiving chip is located in the first shielding cavity; the base body and the first baffle forming a second shielding cavity, so that the second light receiving chip is located in the second shielding cavity; the first baffle located in the first shielding cavity has a shorter extension length than the second baffle, and the second baffle located in the second shielding cavity has a shorter extension length than the first baffle; a first lens, disposed on the support base and located above the first light receiving chip, for focusing the first wavelength optical signal onto the first light receiving chip; The second lens is arranged on the support seat and located above the second light receiving chip, and focuses the second wavelength optical signal to the second light receiving chip.

2. The optical module according to claim 1, wherein The accommodating cavity is provided with a first fixing groove at the bottom and a first fixing surface at the top, the bottom surface of the first fixing groove is inclined at a first preset angle, and the first fixing surface is inclined at a second preset angle; the first optical filter is provided in the first fixing groove, and the second optical filter is provided on the first fixing surface; A plurality of first avoidance grooves are provided on the edge of the first fixing groove, wherein the edges of the first avoidance grooves exceed the edges of the first fixing groove and the bottom surfaces of the first avoidance grooves are lower than the bottom surface of the first fixing groove.

3. The optical module according to claim 2, wherein: A second fixing groove is further provided in the accommodating cavity, and the optical assembly further includes a third filter, which is provided on the reflected light path of the second filter and is used to transmit the second wavelength optical signal; A plurality of second avoidance grooves are provided on the edge of the second fixing groove, wherein the edges of the second avoidance grooves exceed the edges of the second fixing groove and the bottom surfaces of the second avoidance grooves are lower than the bottom surface of the second fixing groove.

4. The optical module according to claim 2, wherein: A third fixing groove is provided at the bottom of the accommodating cavity, the top of the tube cap is embedded in the third fixing groove, and the optical component bracket is connected to the tube cap through the third fixing groove.

5. The optical module according to claim 1, wherein: The support seat is provided with a first through hole and a second through hole, a first sunken groove is provided on the top of the first through hole, a second sunken groove is provided on the top of the second through hole, the first lens is connected to the first sunken groove, and the second lens is connected to the second sunken groove.

6. The optical module according to claim 1, wherein: A first positioning opening is provided on a side of the tube seat, and a second positioning opening is provided on a side of the optical component bracket. The first positioning opening and the second positioning opening coordinate to position the assembly of the optical components on the tube cap.

7. The optical module according to claim 1, wherein: The optical receiving device further includes a first transimpedance amplifier and a second transimpedance amplifier, wherein the first transimpedance amplifier and the second transimpedance amplifier are mounted on the top surface of the tube base; the first transimpedance amplifier is arranged on a side of the first optical receiving chip away from the base, and the second transimpedance amplifier is arranged on a side of the second optical receiving chip away from the base; The pipe cap includes a pipe cap body and a flat window glass. A third through hole is provided on the pipe cap body. The flat window glass is connected to the pipe cap body and seals the third through hole.

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