CN219496739U - Optical module - Google Patents

Abstract

The application discloses an optical module, including a light receiving assembly. The light receiving assembly includes a receiving cap, a receiving socket, and a first spectroscopic device. The top of the receiving tube seat is provided with a first light receiving chip and a second light receiving chip. The first light splitting device is fixedly connected with the receiving pipe cap. The first light-splitting device comprises a first light-splitting component, and a second lens and a third lens which are connected with the first light-splitting component. The first light-splitting member has a first light-splitting film and a second light-splitting film. The first light splitting film is used for reflecting received data light to the second light splitting film and transmitting the received data light to the fourth lens. The second light splitting film is used for reflecting received data light. In this application, first beam split device includes first beam split spare and two lenses, and first beam split spare has beam split membrane to realize splitting, and two lenses all with first beam split spare fixed connection, greatly reduced the assembly degree of difficulty of optical receiving assembly, improve optical receiving assembly's assembly precision, and then improve coupling efficiency.

Description

Optical module

Technical Field

The application relates to the technical field of optical fiber communication, in particular to an optical module.

Background

Compared with other packaging technologies, the TO (Through-hole) based packaging technology has the advantages of small parasitic parameters, low process cost and the like, so that a coaxial TO packaging mode is often adopted for the light receiving component in the optical module.

The light receiving part comprises a receiving pipe cap and a receiving pipe seat, the receiving pipe cap is covered on the receiving pipe seat, a collimating lens is arranged on the receiving pipe cap, a cavity is formed by the receiving pipe cap and the receiving pipe seat in a surrounding mode, a first optical filter, a second optical filter, a first focusing lens and a second focusing lens are arranged in the cavity, and a first light receiving chip and a second light receiving chip are arranged at the top of the receiving pipe seat. The light receiving component receives data light, the data light is collimated by the collimating lens and then enters the cavity, a large beam of collimated light is divided into two small beams of collimated light by the first optical filter, and one small beam of collimated light is directly transmitted to the first focusing lens and is coupled to the first light receiving chip by the first focusing lens. The other small Shu Zhunzhi light is reflected to the second optical filter, reflected by the second optical filter and coupled to the second light receiving chip through the second focusing lens.

When the first optical filter and the second optical filter are installed with a large inclination error, the light reflected by the second optical filter may be only partially received by the second optical receiving chip or not received by the second optical receiving chip at all, resulting in reduced coupling efficiency.

Disclosure of Invention

The application provides an optical module, which improves coupling efficiency.

An optical module, comprising:

a light receiving assembly for receiving data light; wherein the light receiving assembly comprises:

a receiving tube seat, the top of which is provided with a first light receiving chip and a second light receiving chip;

the receiving pipe cap is covered on the receiving pipe seat;

the first light splitting device is fixedly connected with the receiving pipe cap; wherein the first spectroscopic device includes:

a second lens;

a third lens;

the first light splitting piece is fixedly connected with the second lens and the third lens and is provided with a first light splitting film and a second light splitting film;

a first light-splitting film for reflecting the received data light to the second light-splitting film and transmitting the received data light to the second lens; the second lens is used for coupling the received data light to the first light receiving chip;

the second light splitting film is arranged opposite to the first light splitting film and is used for reflecting received data light to the third lens; the third lens is used for coupling the received data light to the second light receiving chip.

The beneficial effects are that: the application provides an optical module including a light receiving assembly. The light receiving assembly is used for receiving data light. The light receiving assembly comprises a receiving pipe cap, a receiving pipe seat and a first light splitting device. The receiving pipe cap is covered on the receiving pipe seat. The top of the receiving tube seat is provided with a first light receiving chip and a second light receiving chip. The first light splitting device is fixedly connected with the receiving pipe cap. The first light splitting device comprises a first light splitting piece, a second lens and a third lens. The first light-splitting member has a first light-splitting film and a second light-splitting film. And the second lens is connected with one surface of the first lens body facing the first light receiving chip, is arranged corresponding to the first light receiving chip and is used for coupling the received data light to the first light receiving chip. And the third lens is connected with one surface of the first lens body facing the second light receiving chip, is arranged corresponding to the second light receiving chip and is used for coupling the received data light to the second light receiving chip. The first light splitting film is used for reflecting received data light to the second light splitting film and transmitting the received data light to the fourth lens. And the second light splitting film is arranged opposite to the first light splitting film and is used for reflecting received data light. The data light is incident to the first light-splitting component and is transmitted to the first light-splitting film along the first light-splitting component, the data light is reflected and transmitted at the first light-splitting film, the data light after primary reflection is reflected at the second light-splitting film, and the data light after secondary reflection is coupled to the second light-receiving chip through the third lens. The data light after once transmission is coupled to the first light receiving chip through the second lens. In this application, first beam split device includes first beam split spare and two lenses, and two lenses all with first beam split spare fixed connection, greatly reduced the assembly degree of difficulty of light receiving component, improve the assembly precision of light receiving component, and then improve coupling efficiency. In addition, the first light splitting piece is provided with two light splitting films, the two light splitting films divide received data light into two beams, and the data light after the light splitting is respectively coupled to the corresponding light receiving chip through two lenses fixedly connected with the first light splitting piece, so that the light receiving component realizes a double-channel receiving function.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a partial architectural diagram of an optical communication system according to some embodiments;

FIG. 2 is a partial block diagram of a host computer according to some embodiments;

FIG. 3 is a block diagram of an optical module according to some embodiments;

fig. 4 is an exploded view of a light module according to some embodiments;

FIG. 5 is an assembly view of a light emitting component, a light receiving component, and a circuit board according to some embodiments;

FIG. 6 is a cross-sectional view of a light emitting component, a light receiving component, and a circuit board according to some embodiments;

FIG. 7 is a second cross-sectional view of a light emitting component, a light receiving component, and a circuit board according to some embodiments;

FIG. 8 is an exploded view of a light emitting component, a light receiving component, and a circuit board according to some embodiments;

FIG. 9 is a cross-sectional view of a circuit board and a substrate according to some embodiments;

FIG. 10 is an exploded view of a circuit board and a substrate according to some embodiments;

FIG. 11 is a block diagram of a substrate according to some embodiments;

fig. 12 is a block diagram of a light receiving assembly according to some embodiments;

FIG. 13 is an exploded view of a light receiving assembly according to some embodiments;

fig. 14 is a cross-sectional view of a light receiving assembly according to some embodiments;

fig. 15 is a block diagram of a receiving cap of a light receiving assembly according to some embodiments;

FIG. 16 is a block diagram of an optical splitting device according to some embodiments;

FIG. 17 is an exploded view of a light splitting device according to some embodiments;

FIG. 18 is a cross-sectional view of a light splitting device according to some embodiments;

fig. 19 is an optical path diagram of a light receiving assembly according to some embodiments;

fig. 20 is a block diagram of another light receiving assembly according to some embodiments;

FIG. 21 is an exploded view of another light receiving assembly according to some embodiments;

fig. 22 is a cross-sectional view of another light receiving assembly according to some embodiments;

FIG. 23 is a block diagram of another light splitting device according to some embodiments;

FIG. 24 is an exploded view of another light splitting device according to some embodiments;

FIG. 25 is a cross-sectional view of another light splitting device according to some embodiments;

fig. 26 is an optical path diagram of another light receiving assembly according to some embodiments.

Detailed Description

The optical communication technology establishes information transfer between information processing apparatuses, and the optical communication technology loads information onto light, and uses propagation of light to realize information transfer, and the light loaded with information is an optical signal. The optical signal propagates in the information transmission device, so that the loss of optical power can be reduced, and the high-speed, long-distance and low-cost information transmission can be realized. Information that can be processed by the information processing device exists in the form of an electrical signal, and an optical network terminal/gateway, a router, a switch, a mobile phone, a computer, a server, a tablet computer and a television are common information processing devices, and an optical fiber and an optical waveguide are common information transmission devices.

The mutual conversion of optical signals and electric signals between the information processing equipment and the information transmission equipment is realized through an optical module. For example, an optical fiber is connected to an optical signal input end and/or an optical signal output end of the optical module, and an optical network terminal is connected to an electrical signal input end and/or an electrical signal output end of the optical module; the optical module converts the first optical signal into a first electric signal, and the optical module transmits the first electric signal into an optical network terminal; the second electrical signal from the optical network terminal is transmitted into the optical module, the optical module converts the second electrical signal into a second optical signal, and the optical module transmits the second optical signal into the optical fiber. Because the information processing devices can be connected with each other through an electrical signal network, at least one type of information processing device is required to be directly connected with the optical module, and not all types of information processing devices are required to be directly connected with the optical module, and the information processing device directly connected with the optical module is called an upper computer of the optical module.

Fig. 1 is a partial architectural diagram of an optical communication system according to some embodiments. As shown in fig. 1, a part of the optical communication system is represented as a remote information processing apparatus 1000, a local information processing apparatus 2000, a host computer 100, an optical module 200, an optical fiber 101, and a network cable 103.

One end of the optical fiber 101 extends toward the remote information processing apparatus 1000, and the other end is connected to the optical interface of the optical module 200. The optical signal can be totally reflected in the optical fiber 101, the propagation of the optical signal in the total reflection direction can almost maintain the original optical power, the optical signal can be totally reflected in the optical fiber 101 for a plurality of times, the optical signal from the direction of the far-end information processing device 1000 is transmitted into the optical module 200, or the light from the optical module 200 is propagated towards the direction of the far-end information processing device 1000, so that the information transmission with long distance and low power consumption is realized.

The number of the optical fibers 101 may be one or plural (two or more); the optical fiber 101 and the optical module 200 are movably connected in a pluggable mode, and can also be fixedly connected.

The upper computer 100 is provided with an optical module interface 102, and the optical module interface 102 is configured to be connected with the optical module 200, so that the upper computer 100 and the optical module 200 are connected by unidirectional/bidirectional electric signals; the upper computer 100 is configured to provide data signals to the optical module 200, or receive data signals from the optical module 200, or monitor and control the working state of the optical module 200.

The upper computer 100 has an external electrical interface, such as a universal serial bus interface (Universal Serial Bus, USB), a network cable interface 104, and the external electrical interface can access an electrical signal network. Illustratively, the network cable interface 104 is configured to access the network cable 103, thereby enabling the host computer 100 to establish a unidirectional/bidirectional electrical signal connection with the network cable 103.

Optical network terminals (ONU, optical Network Unit), optical line terminals (OLT, optical Line Terminal), optical network devices (ONT, optical Network Terminal), and data center servers are common upper computers.

One end of the network cable 103 is connected to the local information processing device 2000, the other end is connected to the host computer 100, and the network cable 103 establishes an electrical signal connection between the local information processing device 2000 and the host computer 100.

Illustratively, the third electrical signal sent by the local information processing apparatus 2000 is transmitted to the host computer 100 through 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, the optical module 200 transmits the second optical signal to the optical fiber 101, and the second optical signal is transmitted to the remote information processing apparatus 1000 in the optical fiber 101.

Illustratively, the first optical signal from the direction of the remote information processing apparatus 1000 propagates through the optical fiber 101, the first optical signal from the optical fiber 101 is transmitted into 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 into the host computer 100, the host computer 100 generates a fourth electrical signal based on the first electrical signal, and the host computer 100 transmits the fourth electrical signal into the local information processing apparatus 2000.

The optical module is a tool for realizing the mutual conversion of the optical signal and the electric signal, and the information is not changed in the conversion process of the optical signal and the electric signal, and the encoding and decoding modes of the information can be changed.

Fig. 2 is a partial block diagram of a host computer according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, fig. 2 only shows the structure of the host computer 100 and the optical module 200. As shown in fig. 2, the upper computer 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on a surface of the PCB circuit board 105, a heat sink 107 disposed on the cage 106, and an electrical connector (not shown in the drawing) disposed inside the cage 106, wherein the heat sink 107 has a convex structure for increasing a heat dissipation area, and the fin-like structure is a common convex structure.

The optical module 200 is inserted into the cage 106 of the host computer 100, the optical module 200 is fixed by the cage 106, and heat generated by the optical module 200 is transferred 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 interface of the optical module 200 is connected with an electrical connector inside the cage 106.

Fig. 3 is a block diagram of an optical module according to some embodiments, and fig. 4 is an exploded view of an optical module according to some embodiments. As shown in fig. 3 and 4, the optical module 200 includes a housing (shell), a circuit board 300 disposed within the housing, a light emitting part 400, and a light receiving part 500. The present disclosure is not limited thereto and in some embodiments, the optical module 200 includes one of the light emitting part 400 and the light receiving part 500.

The housing includes an upper housing 201 and a lower housing 202, the upper housing 201 being capped on the lower housing 202 to form the above-described housing having two openings 204 and 205; the outer contour of the housing generally presents a square shape.

In some embodiments, the lower housing 202 includes a bottom plate 2021 and two lower side plates 2022 disposed on both sides of the bottom plate 2021 and perpendicular to the bottom plate 2021; the upper housing 201 includes a cover 2011, and the cover 2011 is covered on two lower side plates 2022 of the lower housing 202 to form the housing.

In some embodiments, the lower housing 202 includes a bottom plate 2021 and two lower side plates 2022 disposed on both sides of the bottom plate 2021 and perpendicular to the bottom plate 2021; the upper housing 201 includes a cover 2011, and two upper side plates disposed on two sides of the cover 2011 and perpendicular to the cover 2011, and the two upper side plates are combined with two lower side plates 2022 to cover the upper housing 201 on the lower housing 202.

The direction of the connection line of the two openings 204 and 205 may be identical to the length direction of the optical module 200 or not identical to the length direction of the optical module 200. For example, opening 204 is located at the end of light module 200 (right end of fig. 3) and opening 205 is also located at the end of light module 200 (left end of fig. 3). Alternatively, the opening 204 is located at the end of the light module 200, while the opening 205 is located at the side of the light module 200. The opening 204 is an electrical interface, and the golden finger of the circuit board 300 extends out of the electrical interface and is inserted into an electrical connector of the upper computer; the opening 205 is an optical port configured to access the optical fiber 101 such that the optical fiber 101 connects to the light emitting component 400 and/or the light receiving component 500 in the optical module 200.

The assembly mode of combining the upper shell 201 and the lower shell 202 is adopted, so that the circuit board 300, the light emitting component 400, the light receiving component 500 and other components can be conveniently installed in the shells, and the shapes of the components can be packaged and protected by the upper shell 201 and the lower shell 202. In addition, when the circuit board 300, the light emitting part 400, the light receiving part 500, and the like are assembled, the positioning part, the heat dissipating part, and the electromagnetic shielding part of these devices are easily disposed, which is advantageous for automating the production.

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

In some embodiments, the light module 200 further comprises an unlocking member 203 located outside its housing. The unlocking part 203 is configured to realize a fixed connection between the optical module 200 and the upper computer, or to release the fixed connection between the optical module 200 and the upper computer.

For example, the unlocking member 203 is located outside the two lower side plates 2022 of the lower housing 202, and includes an engaging member that mates with the cage 106 of the upper computer. When the optical module 200 is inserted into the cage 106, the optical module 200 is fixed in the cage 106 by the engaging member of the unlocking member 203; when the unlocking member 203 is pulled, the engaging member of the unlocking member 203 moves along with the unlocking member, so as to change the connection relationship between the engaging member and the host computer, so as to release the engagement and fixed connection between the optical module 200 and the host computer, and thus the optical module 200 can be pulled out from the cage 106.

The circuit board 300 includes circuit traces, electronic components, chips, etc., and the electronic components and the chips are connected together according to a circuit design through the circuit traces to realize functions of power supply, electric signal transmission, grounding, etc. The electronic components may include, for example, capacitors, resistors, transistors, metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). The chips may include, for example, a micro control unit (Microcontroller Unit, MCU), a laser driver chip, a transimpedance amplifier (Transimpedance Amplifier, TIA), a limiting amplifier (limiting amplifier), a clock data recovery chip (Clock and Data Recovery, CDR), a power management chip, a digital signal processing (Digital Signal Processing, DSP) chip.

The circuit board 300 is generally a hard circuit board, and the hard circuit board can also realize a bearing function due to the relatively hard material, for example, the hard circuit board can stably bear the electronic components and chips; the hard circuit board is also convenient to insert into an electric connector in the host computer cage.

The circuit board 300 further includes a gold finger formed on an end surface thereof, the gold finger being composed of a plurality of independent leads. The circuit board 300 is inserted into the cage 106 and is electrically connected to the electrical connectors within the cage 106 by the gold fingers. The gold fingers may be disposed on only one surface (e.g., the upper surface shown in fig. 4) of the circuit board 300, or may be disposed on both upper and lower surfaces of the circuit board 300, so as to provide more pins. The golden finger is configured to establish electrical connection with the upper computer to achieve power supply, grounding, I2C signal transmission, data signal transmission and the like.

Of course, a flexible circuit board is also used in some optical modules, and the flexible circuit board is generally used in cooperation with a hard circuit board to supplement the hard circuit board.

The light emitting part 400 and/or the light receiving part 500 are located at a side of the circuit board 300 away from the gold finger; in some embodiments, the light emitting part 400 and the light receiving part 500 are physically separated from the circuit board 300, respectively, and then electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connectors, respectively; in some embodiments, the light emitting and/or light receiving components may be disposed directly on the circuit board 300, may be disposed on a surface of the circuit board, or may be disposed on a side of the circuit board.

The light emitting part 400 is connected to the circuit board 300 for emitting data light.

In some embodiments, the light emitting component 400 includes an emitting housing that is clamped to the opening area of the circuit board, and a plurality of laser chips are disposed in the emitting housing and used for emitting data light.

The laser chip may emit 25G, 50G, and 100G data light. When the laser chip emits the 25G data light, the light emitting part 400 including a plurality of laser chips emits a plurality of 25G data lights. When the laser chip emits 50G data light, the light emitting part 400 including a plurality of laser chips emits a plurality of 50G data light. When the laser chip emits 100G data light, the light emitting part 400 including a plurality of laser chips emits a plurality of 100G data light.

The light receiving part 500 is disposed on the surface of the circuit board 300 for receiving the data light.

In some embodiments, the light receiving part 500 includes a plurality of light receiving chips for receiving the data light.

The light receiving chip may receive 25G, 50G, and 100G data light. When the light receiving chip receives the 25G data light, the light receiving part 500 including a plurality of light receiving chips receives a plurality of 25G data lights. When the light receiving chip receives the 25G data light, the light receiving part 500 including a plurality of light receiving chips receives a plurality of 50G data light. When the light receiving chip receives the 25G data light, the light receiving part 500 including a plurality of light receiving chips receives a plurality of 100G data light.

As shown in fig. 4, in some embodiments, the optical module further includes a first fiber optic connector 700 and a second fiber optic connector 800. The first optical fiber connector 700 is connected to the light emitting part 400 and the first external optical fiber at both ends thereof, respectively, for transmitting the data light emitted from the light emitting part 400 to the first external optical fiber. The second optical fiber connector 800 is connected to the light receiving part 500 and the second external optical fiber at both ends thereof, respectively, for transmitting the data light transmitted to the second external optical fiber to the light receiving part 500.

As shown in fig. 4, in some embodiments, the upper surface of the circuit board 300 is provided with a substrate 600, and the light receiving member 500 is partially fixed to the circuit board 300 through the substrate 600.

Fig. 5 is an assembly diagram of a light emitting component, a light receiving component, and a circuit board according to some embodiments. As shown in fig. 5, in some embodiments, the light receiving component 500 includes an optical fiber collimator 501 and a first light receiving component 503, where the optical fiber collimator 501 may be disposed on a surface of the circuit board 300, or may be disposed in a hollowed-out area of the circuit board 300, and the first light receiving component 503 is fixed on the circuit board 300 through the substrate 600, and a central axis of the optical fiber collimator 501 and a central axis of the first light receiving component 503 are parallel to each other.

The optical fiber collimator 501 is connected with the second optical fiber connector 800 through an optical fiber, and the optical fiber collimator 501 collimates the data light transmitted by the second optical fiber connector 800 to obtain collimated light, and the collimated light is incident to the first light receiving component 503.

In some embodiments, the first light receiving component 503 is a device formed based on TO packaging technology, where the first light receiving component 503 includes a receiving cap, a receiving socket, and a receiving pin, the receiving cap is covered on the receiving socket, the receiving cap and the receiving socket enclose a cavity, one end of the receiving pin is inserted from the bottom of the receiving socket and extends out of the top of the receiving socket, a plurality of light receiving chips are disposed on the top of the receiving socket, the other end of the receiving pin is connected with a circuit board, and the light receiving chips are connected with the receiving pin.

The first light receiving element 503 is fixed to a circuit board through a fixing substrate 600, so that the light receiving member 500 realizes a receiving function.

In some embodiments, the light receiving part 500 includes a fiber collimator 501, a prism 502, and a second light receiving element 504, the prism 502 is located between the fiber collimator 501 and the second light receiving element 504, the prism 502 is located on the substrate 600, and a central axis of the fiber collimator 501 and a central axis of the second light receiving element 504 are perpendicular to each other.

Since the central axis of the optical fiber collimator 501 and the central axis of the second light receiving element 504 are perpendicular to each other, the collimated light collimated by the optical fiber collimator 501 cannot enter the second light receiving element 504, and therefore, a prism 502 needs to be disposed between the optical fiber collimator 501 and the second light receiving element 504 so that the collimated light is incident on the second light receiving element 504.

The prism 502 is a reflecting prism. The reflecting prism reflects the collimated light to the second light receiving assembly 504.

The optical fiber collimator 501 collimates the data light transmitted from the second optical fiber connector 800, and the collimated light is reflected by the prism 502 and then enters the second light receiving element 504.

In some embodiments, the light receiving part 500 includes only the first light receiving component 503 or the second light receiving component 504, and a plurality of light receiving chips are disposed within the first light receiving component 503 or the second light receiving component 504, so that the light receiving part 500 implements a multi-channel receiving function.

Illustratively, two light receiving chips are disposed within the first light receiving assembly 503 and the second light receiving assembly 504 such that the light receiving member 500 including only the first light receiving assembly 503 or the second light receiving assembly 504 implements a dual channel receiving function. Three light receiving chips are disposed within the first light receiving assembly 503 or the second light receiving assembly 504 such that the light receiving member 500 including only the first light receiving assembly 503 or the second light receiving assembly 504 realizes a three-channel receiving function.

In some embodiments, the light receiving part 500 includes a fiber collimator 501, a prism 502, a first light receiving element 503, and a second light receiving element 504.

Since the light receiving unit 500 includes the first light receiving element 503 and the second light receiving element 504, in order to allow the first light receiving element 503 and the second light receiving element 504 to each receive the collimated light, a prism 502 needs to be disposed between the optical fiber collimator 501 and the first light receiving element 503, so that the collimated light is respectively incident on the first light receiving element 503 and the second light receiving element 504.

The prism 502 is a beam splitter prism, which is used to split a received collimated beam of light. The first light receiving component 503 is configured to receive a beam of collimated light split by the prism 502. The second light receiving element 504 is configured to receive another beam of collimated light split by the prism 502.

In some embodiments, the beam splitting prism includes a beam splitting prism body and a beam splitting film disposed on the beam splitting prism body. When the light-splitting film of the light-splitting prism is a wavelength light-splitting film, the light-splitting prism is a wavelength light-splitting prism. When the light splitting film of the light splitting prism is a polarized light splitting film, the light splitting prism is a polarized light splitting prism. Accordingly, the light-splitting prism includes a polarization light-splitting prism and a wavelength light-splitting prism.

The polarization beam splitter prism is used for dividing a beam of data light into horizontally polarized data light and vertically polarized data light. The wavelength splitting prism is used for splitting a beam of data light into at least two beams of data light with different wavelengths.

In some embodiments, the light receiving part 500 includes a fiber collimator 501, a prism 502, and first and second light receiving elements 503 and 504 perpendicular to each other.

When the included angle between the plane of the polarization state light splitting film of the light splitting prism and the bottom surface of the light splitting prism body is 45 degrees, the two polarized collimated light beams emitted by the prism 502 are mutually perpendicular. When the included angle between the surface of the wavelength splitting film of the splitting prism and the bottom surface of the splitting prism body is 45 degrees, two collimated light beams with different wavelengths emitted by the prism 502 are perpendicular to each other.

In some embodiments, the light receiving part 500 includes a first light receiving component 503 and a second light receiving component 504, and a plurality of light receiving chips are disposed in each of the first light receiving component 503 and the second light receiving component 504, so that the light receiving part 500 implements a multi-channel receiving function.

Illustratively, two light receiving chips are disposed within the first light receiving assembly 503 or the second light receiving assembly 504 such that the light receiving member 500 including the first light receiving assembly 503 and the second light receiving assembly 504 implements a four-channel receiving function. Three light receiving chips are disposed within the first light receiving assembly 503 and the second light receiving assembly 504 such that the light receiving member 500 including the first light receiving assembly 503 and the second light receiving assembly 504 realizes a six-channel receiving function.

The first light receiving element 503 and the second light receiving element 504 may be non-parallel light receiving elements or parallel light receiving elements.

In some embodiments, when the first light receiving element 503 and the second light receiving element 504 are non-parallel light receiving elements, a focusing lens is disposed on the substrate 600.

When the first light receiving element 503 and the second light receiving element 504 are non-parallel light receiving elements, the data light incident on the first light receiving element 503 and the second light receiving element 504 is required to be non-collimated light. The data light collimated by the fiber collimator 501 is collimated, and therefore a focusing lens is required to be provided on the substrate 600.

Illustratively, when the light receiving part 500 includes only the first light receiving component 503 or the second light receiving component 504, the light receiving part 500 further includes a focusing lens disposed between the prism 502 and the first light receiving component 503 or the second light receiving component 504, the focusing lenses each being configured to couple collimated light so that the data light incident on the first light receiving component 503 or the second light receiving component 504 is non-collimated light.

Illustratively, when the light receiving part 500 includes the first light receiving component 503 and the second light receiving component 504, the light receiving part 500 further includes two focusing lenses, one focusing lens being located between the prism 502 and the first light receiving component 503 and the other focusing lens being located between the prism 502 and the second light receiving component 504, both focusing lenses being used to couple collimated light so that the data light incident to the first light receiving component 503 and the second light receiving component 504 is non-collimated light.

In some embodiments, when the first light receiving element 503 and the second light receiving element 504 are parallel light receiving elements, a focusing lens is not required to be disposed on the substrate 600.

When the first light receiving element 503 and the second light receiving element 504 are parallel light receiving elements, the data light incident on the first light receiving element 503 and the second light receiving element 504 is required to be collimated light. The data light collimated by the optical fiber collimator 501 is collimated light, and therefore, a focusing lens is not required to be provided on the substrate 600.

Fig. 6 is an exploded view of a light emitting component, a light receiving component, and a circuit board according to some embodiments. As shown in fig. 6, in some embodiments, the circuit board 300 is provided with an opening region 303 and a chip 304, and the light emitting member 400 is disposed at the opening region 303.

In some embodiments, the chip 304 may be a DSP chip. The DSP chip is connected to the light emitting part 400 and the light receiving part 500, respectively.

As shown in fig. 6, in some embodiments, the substrate 600 has a notch area 603, where the notch area 603 is disposed corresponding to the chip 304 of the circuit board to avoid the chip 304 on the circuit board 300.

As shown in fig. 6, in some embodiments, the substrate 600 has a clamping groove in addition to the notch region 603.

The clamping groove is formed by the inward recess of the substrate 600 for fixing the light receiving assembly on the circuit board 300. The light receiving component is clamped in the clamping groove and fixed in the clamping groove through glue, so that the light receiving component is fixed on the circuit board 300.

The clamping groove can be provided with a hollowed-out area or not.

When the thickness of the substrate 600 is smaller, the height of the clamping groove is also smaller, and when the bottom of the clamping groove is not hollowed, the light receiving component clamped in the clamping groove receives little data light, and even cannot receive the data light. In order to make the light receiving components clamped in the clamping grooves receive as much data light separated by the prism 502 as possible, in some embodiments, the bottom of the clamping groove is provided with a hollowed-out area, and the corresponding area of the circuit board 300 is provided with a storage groove, and the clamping groove and the storage groove form a clamping area. The light receiving component is clamped in the clamping area, so that data light received by the light receiving component is as much as possible, and the coupling efficiency is improved.

When the thickness of the substrate 600 is large enough, the height of the clamping groove is also large, the bottom of the clamping groove does not need to be hollowed out, and the data light received by the light receiving component clamped in the clamping groove can be as much as possible, so that the coupling efficiency is improved.

Fig. 7 is a cross-sectional view of a light emitting component, a light receiving component, and a circuit board according to some embodiments. Fig. 8 is a second cross-sectional view of a light emitting component, a light receiving component, and a circuit board according to some embodiments. As shown in fig. 7 and 8, in some embodiments, the light receiving component includes a first light receiving component 503, and the central axis of the optical fiber collimator 501 and the central axis of the first light receiving component 503 are parallel to each other, and the clamping groove includes only a first clamping groove 601, where the first light receiving component 503 is clamped in the first clamping groove 601.

In some embodiments, the light receiving component includes only the second light receiving component 504, and the central axis of the optical fiber collimator 501 is perpendicular to the central axis of the second light receiving component 504, and the clamping groove includes only the second clamping groove 602, and the second light receiving component 504 is clamped in the second clamping groove 602.

In some embodiments, the light receiving component includes a first light receiving component 503 and a second light receiving component 504, the clamping groove includes a first clamping groove 601 and a second clamping groove 602, the first clamping groove 601 is disposed corresponding to the first light receiving component 503, the second clamping groove 602 is disposed corresponding to the second light receiving component 504, the first light receiving component 503 is clamped in the first clamping groove 601, and the second light receiving component 504 is clamped in the second clamping groove 602.

In some embodiments, the light receiving component includes a first light receiving component 503 and a second light receiving component 504 that are perpendicular to each other, the clamping groove includes a first clamping groove 601 and a second clamping groove 602, the first clamping groove 601 is perpendicular to the second clamping groove 602, the first light receiving component 503 is clamped in the first clamping groove 601, and the second light receiving component 504 is clamped in the second clamping groove 602.

Because the clamping groove can have a hollowed-out area or not, the first clamping groove 601 can have a first hollowed-out area or not; the second clamping groove 602 may or may not have a second hollowed out area.

As shown in fig. 7 and 8, in some embodiments, the storage slot is formed by the circuit board 300 being recessed inward, and the storage slot and the clamping slot having a hollowed-out area form a clamping area. The light receiving component is fixed to the clamping area through glue, so that the light receiving component is fixed to the circuit board 300.

In some embodiments, the light receiving component only includes the first light receiving component 503, and the central axis of the optical fiber collimator 501 and the central axis of the first light receiving component 503 are parallel to each other, the clamping groove only includes a first clamping groove 601 having a first hollowed-out area, the storage groove only includes the first storage groove 301, and the first light receiving component 503 is clamped in the first clamping area formed by the first clamping groove 601 and the first storage groove 301.

In some embodiments, the light receiving component only includes the second light receiving element 504, and the central axis of the optical fiber collimator 501 is perpendicular to the central axis of the second light receiving element 504, the clamping groove only includes the second clamping groove 602 having the second hollowed-out area, the storage groove only includes the second storage groove 302, and the second light receiving element 504 is clamped in the second clamping area formed by the second clamping groove 602 and the second storage groove 302.

In some embodiments, the light receiving means comprises a first light receiving component 503 and a second light receiving component 504. The clamping grooves comprise a first clamping groove 601 with a first hollowed-out area and a second clamping groove 602 with a second hollowed-out area, the first clamping groove 601 is correspondingly arranged with the first light receiving assembly 503, and the second clamping groove 602 is correspondingly arranged with the second light receiving assembly 504. The storage groove comprises a first storage groove 301 and a second storage groove 302, the first storage groove 301 is correspondingly arranged with the first clamping groove 601, the second storage groove 302 is correspondingly arranged with the second clamping groove 602, the first light receiving component 503 is clamped in a first clamping area formed by the first clamping groove 601 and the first storage groove 301, and the second light receiving component 504 is clamped in a second clamping area formed by the second clamping groove 602 and the second storage groove 302.

In some embodiments, the light receiving means comprises a first light receiving element 503 and a second light receiving element 504 perpendicular to each other. The clamping grooves comprise a first clamping groove 601 with a first hollowed-out area and a second clamping groove 602 with a second hollowed-out area, and the first clamping groove 601 and the second clamping groove 602 are mutually perpendicular. The storage groove comprises a first storage groove 301 and a second storage groove 302, the first storage groove 301 is correspondingly arranged with the first clamping groove 601, and the second storage groove 302 is correspondingly arranged with the second clamping groove 602. The first light receiving element 503 is clamped in a first clamping area formed by the first clamping groove 601 and the first storage groove 301, and the second light receiving element 504 is clamped in a second clamping area formed by the second clamping groove 602 and the second storage groove 302.

Fig. 9 is a cross-sectional view of a circuit board and a substrate according to some embodiments. Fig. 10 is an exploded view of a circuit board and a substrate according to some embodiments. Fig. 11 is a block diagram of a substrate according to some embodiments. As shown in fig. 9-11, in some embodiments, the first clamping groove 601 has a first clamping surface 6011, a second clamping surface 6012, a third clamping surface 6013, and a fourth clamping surface, where the first clamping surface 6011, the second clamping surface 6012, the third clamping surface 6013, and the fourth clamping surface are sequentially connected, the first clamping surface 6011 is disposed opposite the third clamping surface 6013, and the second clamping surface 6012 and the fourth clamping surface are disposed opposite.

In some embodiments, the second clamping surface 6012 and the fourth clamping surface are perpendicular to the surface of the substrate 600, respectively, and the first clamping surface 6011 and the third clamping surface 6013 are neither perpendicular nor parallel to the surface of the substrate 600, respectively.

The second clamping face 6012 is connected with the top of the receiving pipe cap of the first light receiving component 503, the fourth clamping face is connected with the bottom of the receiving pipe seat of the first light receiving component 503, and the first clamping face 6011 and the third clamping face 6013 are respectively connected with the side faces of the receiving pipe cap and the receiving pipe seat of the first light receiving component 503, so that the first light receiving component 503 is fixed in the first clamping groove 601 through glue. When the first clamping surface 6011 and the third clamping surface 6013 are not connected, the first clamping groove 601 has a first hollowed-out area.

The first clamping groove 601 formed by the first clamping surface 6011, the second clamping surface 6012, the third clamping surface 6013 and the fourth clamping surface is arc-shaped or V-shaped.

As shown in fig. 9-11, in some embodiments, the second clamping groove 602 has a fifth clamping face 6021, a sixth clamping face, and a seventh clamping face 6022, where the fifth clamping face 6021, the sixth clamping face, and the seventh clamping face 6022 are connected in sequence, and the fifth clamping face 6021 and the seventh clamping face 6022 are disposed opposite each other.

In some embodiments, the sixth clamping surface is perpendicular to the surface of the substrate 600, and the fifth clamping surface 6021 and the seventh clamping surface 6022 are neither perpendicular nor parallel to the surface of the substrate 600, respectively.

The sixth clamping surface is connected with the top of the receiving cap of the second light receiving component 504, and the fifth clamping surface 6021 and the seventh clamping surface 6022 are respectively connected with the side surfaces of the receiving cap and the receiving tube seat of the second light receiving component 504, so that the second light receiving component 504 is fixed in the second clamping groove 602 through glue.

When the fifth clamping face 6021 and the seventh clamping face 6022 are not connected, the second clamping groove 602 has a second hollowed out area.

The second clamping groove 602 formed by the fifth clamping surface 6021, the sixth clamping surface and the seventh clamping surface 6022 is arc-shaped or V-shaped.

In some embodiments, the light module includes a circuit board, a light emitting component, and a light receiving component. The circuit board is provided with an opening area and a substrate is arranged on the surface. The base plate is provided with a clamping groove, and the clamping groove comprises a first clamping groove and a second clamping groove. The light emitting component is clamped in the opening area. The light emitting component comprises an emitting shell, a laser chip is arranged in the emitting shell, and the laser chip is used for emitting data light. The light receiving part is connected with the circuit board and is used for receiving data light. Wherein the light receiving member includes an optical fiber collimator, a prism, a first light receiving element, and a second light receiving element. The optical fiber collimator is used for collimating received data light to obtain collimated light. The prism is used for splitting the received collimated light beam. The first light receiving component is arranged at the first clamping groove and is used for receiving a beam of collimated light split by the prism. The second light receiving component is arranged at the second clamping groove and is used for receiving the other beam of collimated light split by the prism. The first light receiving component and the second light receiving component are elements formed by using a TO (Through-hole) packaging technology and comprise a receiving pipe cap, a receiving pipe seat and a receiving pin. The receiving pipe cap is covered on the receiving pipe seat, and the top of the receiving pipe seat is provided with a light receiving chip. And one end of the receiving pin is inserted from the bottom of the receiving tube seat and extends out of the top of the receiving tube seat, and the other end of the receiving pin is connected with the circuit board. The light receiving chip is connected with the receiving pin. The first light receiving assembly is arranged at the first clamping groove, the second light receiving assembly is arranged at the second clamping groove, and then the two light receiving assemblies are fixed on the circuit board through the base plate. In the application, the light emitting component comprises an emitting shell, wherein a laser chip is arranged in the shell and is used for emitting data light, so that the light module realizes an emitting function; the light receiving component comprises an optical fiber collimator, a prism and two light receiving assemblies, wherein the two light receiving assemblies are fixed on the circuit board through a base plate and are used for receiving collimated light split by the prism, so that the light module realizes a receiving function.

In some embodiments, the light receiving component with the dual-channel receiving function comprises a receiving tube cap and a receiving tube seat, the receiving tube cap is covered on the receiving tube seat, the receiving tube cap and the receiving tube seat enclose a cavity, a first optical filter, a second optical filter, a first focusing lens and a second focusing lens are arranged in the cavity, and a first light receiving chip and a second light receiving chip are arranged at the top of the receiving tube seat. The light receiving component receives the data light, a large beam of data light is divided into two small beams of data light through the first optical filter, and one small beam of data light is directly transmitted to the first focusing lens and is coupled to the first light receiving chip through the first focusing lens. The other small beam of data light is reflected to the second optical filter, reflected by the second optical filter and coupled to the second light receiving chip through the second focusing lens.

When the light receiving component is packaged, the positions of the first light receiving chip and the second light receiving chip are fixed, and when the installation inclination errors of the first optical filter and the second optical filter are large, the light reflected by the second optical filter may be only partially received by the second light receiving chip or cannot be received by the second light receiving chip at all, so that the coupling efficiency is reduced.

In order to solve this problem, the following light receiving assembly is provided.

Fig. 12 is a block diagram of a light receiving assembly according to some embodiments. As shown in fig. 12, in some embodiments, the light receiving component 503a includes a receiving tube holder 5031 and a receiving tube cap 5032, where the receiving tube cap 5032 covers the receiving tube holder 5031, and the receiving tube cap 5032 and the receiving tube holder 5031 define a cavity. A light receiving chip is arranged in a cavity surrounded by the receiving pipe cap 5032 and the receiving pipe base 5031, and the light receiving chip is used for converting received data light into a current signal.

As shown in fig. 12, in some embodiments, the light receiving component 503a further includes a receiving pin 5033. One end of the receiving pin 5033 is connected with the circuit board 300 through a flexible circuit board, the other end of the receiving pin 5033 extends into the receiving tube seat 5031, and part of the receiving pin 5033 is connected with a light receiving chip arranged on the top of the receiving tube seat 5031. The receive pin 5033 transmits the current signal to a corresponding chip on the circuit board 300.

In order to enable the light receiving assembly to realize the multi-channel receiving function, at least two light receiving chips are arranged on the top of the receiving tube seat. For example, two light receiving chips are arranged at the top of the receiving tube seat, and the light receiving assembly realizes a double-channel receiving function. The top of the receiving tube seat is provided with three light receiving chips, and the light receiving assembly realizes a three-channel function.

Since the data light incident on the light receiving assembly is a beam of data light, and each receiving chip receives only one specific wavelength of data light, in order to make at least two light receiving chips each receive the corresponding specific wavelength of data light, in some embodiments, a light splitting device is disposed in a cavity surrounded by the receiving tube base 5031 and the receiving tube cap 5032. The light splitting device splits a beam of data light incident on the light receiving component into at least two beams, and couples the split data light to the corresponding light receiving chip.

The light splitting device comprises at least two lenses and a light splitting piece, wherein the at least two lenses are respectively connected with the light splitting piece, and one lens is arranged corresponding to one light receiving chip. The light guide member is provided with at least two light splitting films, and the two light splitting films are used for splitting received data light, and each beam of data light after the light splitting is coupled to the light receiving chip through the lens respectively.

Fig. 13 is an exploded view of a light receiving assembly according to some embodiments. Fig. 14 is a cross-sectional view of a light receiving assembly according to some embodiments. As shown in fig. 13 and 14, in order for the light receiving assembly to implement a dual channel receiving function, in some embodiments, at least two light receiving chips disposed on top of the receiving tube base include a first light receiving chip 5034 and a second light receiving chip 5035, the first light receiving chip 5034 being configured to convert received first specific wavelength data light into a first current signal, and the second light receiving chip 5035 being configured to convert received second specific wavelength data light into a second current signal.

Since the data light incident on the light receiving element 503a is a beam of data light, the first light receiving chip 5034 receives the first specific wavelength data light, and the second light receiving chip 5035 receives the second specific wavelength data light. In order that the first light receiving chip 5034 and the second light receiving chip 5035 can each receive the corresponding data light with a specific wavelength, in some embodiments, a light splitting device is disposed in a cavity enclosed by the receiving tube base 5031 and the receiving tube cap 5032, and the light splitting device includes a first light splitting device 5036.

The first light splitting device 5036 splits one beam of data light incident on the light receiving assembly 503a into two beams of data light, and is coupled to the first light receiving chip 5034 and the second light receiving chip 5035. Wherein, a beam of data light split by the first light splitting device 5036 is a first specific wavelength data light. The other data light split by the first spectroscopic device 5036 is a second specific wavelength data light.

Fig. 15 is a block diagram of a receiving cap of a light receiving assembly according to some embodiments. As shown in fig. 15, in some embodiments, the top of the receiving cap 5032 has a through hole 50321, where the first light splitting device 5036 is snapped at the through hole 50321. The length dimension of the through hole 50321 is larger than the length dimension of the first light splitting device 5036, and the width dimension of the through hole 50321 is larger than the width dimension of the first light splitting device 5036. The data light is incident at the through-hole 50321 and split by the first light splitting device 5036 to be coupled to the first light receiving chip 5034 and the second light receiving chip 5035.

Fig. 16 is a block diagram of an optical splitting device according to some embodiments. Fig. 17 is an exploded view of a light splitting device according to some embodiments. Fig. 18 is a cross-sectional view of a light splitting device according to some embodiments. As shown in fig. 16-18, in some embodiments, the first light splitting device 5036 includes a first light splitting member, a second lens 50364, and a third lens 50365.

One surface of the first light-splitting member facing the first light-receiving chip 5034 is fixedly connected with the second lens 50364, and one surface of the first light-splitting member facing the second light-receiving chip 5035 is fixedly connected with the third lens 50365.

The second lens 50364, which is a focusing lens, is provided corresponding to the first light receiving chip 5034 and is configured to optically couple the received data to the first light receiving chip 5034.

The third lens 50365, which is a focusing lens, is provided corresponding to the second light receiving chip 5035 for coupling the received data light to the second light receiving chip 5035.

The first light splitting piece divides a received beam of data light into two beams of data light, wherein one beam of data light is data light with a first specific wavelength, and the other beam of data light is data light with a second specific wavelength. The first specific wavelength data light is coupled to the first light receiving chip 5034 via the second lens 50364. The second specific wavelength data light is coupled to the second light receiving chip 5035 via the third lens 50365.

In some embodiments, the first light splitting device comprises a first light splitting part and two lenses, and the two lenses are fixedly connected with the first light splitting part, so that the assembly difficulty of the light receiving assembly is greatly reduced, the assembly precision of the light receiving assembly is improved, and the coupling efficiency is improved.

In some embodiments, the first light splitting device 5036 includes a first light splitting element, a first lens 50363, a second lens 50364, and a third lens 50365.

One surface of the first light-splitting member facing away from the first light-receiving chip 5034 is fixedly connected with the first lens 50363, one surface of the first light-splitting member facing the first light-receiving chip 5034 is fixedly connected with the second lens 50364, and one surface of the first light-splitting member facing the second light-receiving chip 5035 is fixedly connected with the third lens 50365.

In some embodiments, when the materials of the first light splitting element, the first lens 50363, the second lens 50364 and the third lens 50365 are all glass, the first lens 50363, the second lens 50364 and the third lens 50365 are respectively and fixedly connected to the first light splitting element by glue.

In some embodiments, when the materials of the first light splitting element, the first lens 50363, the second lens 50364 and the third lens 50365 are all Polyetherimide (PEI), the first lens 50363, the second lens 50364 and the third lens 50365 are respectively and fixedly connected with the first light splitting element through molding.

The first lens 50363 is a collimating lens, and is disposed corresponding to the second lens 50364 to collimate the received data light.

The first lens 50363 collimates a beam of data incident on the first light-splitting device, and the first light-splitting device splits the received collimated beam into two collimated beams, wherein one collimated beam is collimated light of a first specific wavelength, and the other Shu Zhunzhi light is collimated light of a second specific wavelength. The first specific wavelength collimated light is coupled to the first light receiving chip 5034 via the second lens 50364. The second specific wavelength collimated light is coupled to the second light receiving chip 5035 via the third lens 50365.

The first light-splitting device comprises a first light-splitting component and two focusing lenses, and the data light received by the first light-splitting device can be collimated light or emitted light. In order to improve the coupling efficiency of the light receiving assembly, the data light received by the first light splitting device including the first light splitting member and the two focusing lenses is collimated light.

The first light-splitting device comprises a first light-splitting component, a collimating lens and two focusing lenses, so that the data light received by the first light-splitting device can be collimated light or converged light. Since the collimator lens is used for collimating the received data light entering the first light splitting device, in order to avoid waste, the data light received by the first light splitting device comprising the first light splitting device, one collimator lens and two focusing lenses is divergent light.

In some embodiments, the first light splitting member has a first light splitting film and a second light splitting film.

The first light splitting film is configured to transmit a first specific wavelength of the received data light to the second lens 50364, and is also configured to reflect a second specific wavelength of the received data light to the second light splitting film. The second light-splitting film is used for reflecting the second specific wavelength data light reflected by the first light-splitting film to the third lens 50365.

The first specific wavelength data light of the data light is transmitted to the second lens 50364 through the first light splitting film, the second specific wavelength data light of the data light is reflected to the second light splitting film, and the second specific wavelength data light is reflected to the third lens 50365 through the second light splitting film.

In some embodiments, the first light splitting member has two light splitting films, the two light splitting films split the received data light into two beams, and the split data light is respectively coupled to the corresponding light receiving chip through two lenses fixedly connected with the first light splitting member, so that the light receiving component realizes a dual-channel receiving function.

In some embodiments, first light splitting element comprises first light guiding element 50631 and second light guiding element 50362, and first light guiding element 50631 and second light guiding element 50362 are connected.

One surface of the first light guide member 50631, which faces away from the first light receiving chip 5034, is fixedly connected with the first lens 50363, one surface of the first light guide member 50631, which faces away from the second light receiving chip 5035, is provided with a second light splitting film, one surface of the first light guide member 50362, which faces toward the second light receiving chip 5035, is connected with the second light guide member 50362, and one surface of the first light guide member facing toward the second light receiving chip 5035 is fixedly connected with the third lens 50365.

One surface of the second light guide 50362 facing the first light guide 50631 is connected to the first light guide 50631, and one surface facing the first light receiving chip 5034 is fixedly connected to the second lens 50364. A first light splitting film is provided on a surface of the first light guide 50631 facing the second light guide 50362 or a surface of the second light guide 50362 facing the first light guide 50631.

In some embodiments, the first light guide 50631 includes a first connecting surface, a second connecting surface, a third connecting surface, a fourth connecting surface, a fifth connecting surface and a sixth connecting surface that are sequentially connected. The first connection surface, the second connection surface, the third connection surface, the fourth connection surface, the fifth connection surface, and the sixth connection surface are sequentially connected, so that the front view of the first light guide member 50631 is hexagonal.

The first connection surface is a surface of the first light guide member 50631 facing away from the first light receiving chip 5034, and is fixedly connected with the first lens 50363. The third connecting surface is a surface facing the second light guide 50362 of the first light guide 50631, and is adhered to the second light guide 50362. The fourth connection surface is a surface of the first light guide member 50631 facing the second light receiving chip 5035 and is fixedly connected to the third lens 50365. The fifth connecting surface is opposite to the second connecting surface. The sixth connection surface is a surface of the first light guide 50631 facing away from the second light receiving chip 5035, and is disposed opposite to the third connection surface, and a second light splitting film is disposed thereon.

To collimate the data light as much as possible by the first lens 50363 to increase coupling efficiency, in some embodiments, the first connection face is parallel to the top of the receiving header 5031.

In order to couple the data light as much as possible by the third lens 50365 to increase coupling efficiency, in some embodiments, the fourth connection face is parallel to the top of the receiving tube holder 5031.

In some embodiments, the second light guide 50362 includes a seventh connecting surface, an eighth connecting surface and a ninth connecting surface that are sequentially connected. The seventh connection surface, the eighth connection surface, and the ninth connection surface are connected in order such that the front view of the second light guide 50362 is triangular.

The seventh connection surface is a surface of the second light guide member 50362 facing the first light guide member 50631, and is adhered to the third connection surface. The seventh connection surface or the third connection surface is provided with a first spectroscopic film. The eighth connecting surface is connected with the second connecting surface. The ninth connection surface is a surface of the second light guide member 50362 facing the first light receiving chip 5034, and is connected to the fourth connection surface and fixedly connected to the second lens 50364.

In order to couple the data light as much as possible by the second lens 50364 to increase coupling efficiency, in some embodiments, the ninth connection surface is parallel to the top of the receiving tube holder 5031.

The positions of the first light receiving chip 5034 and the second light receiving chip 5035 are fixed, and in order to split the received data light by the first light splitting member and couple the split two data light beams to the first light receiving chip 5034 and the second light receiving chip 5035 through the lens, in some embodiments, the angles between the face on which the first light splitting film is located and the face on which the second light splitting film is located and the top of the receiving tube seat are each 15 ° to 35 °.

In order for the second light receiving chip 5035 to receive as much data light as possible, in some embodiments, an angle between a plane in which the first light splitting film is located and a plane in which the second light splitting film is located is less than 3 °. Further, an included angle between the face where the first light-splitting film is located and the face where the second light-splitting film is located is 0 °.

Fig. 19 is an optical path diagram of a light receiving assembly according to some embodiments. As shown in fig. 19, in some embodiments, the data light is incident on the first lens 50363 and collimated by the first lens 50363. The collimated light is incident on the first light-splitting member and transmitted to the first light-splitting film along the first light-guiding member 50631 of the first light-splitting member. The collimated light is reflected and transmitted by the first light splitting film, the once transmitted collimated light (first specific wavelength collimated light) is coupled to the first light receiving chip 5034 via the second lens 50364, the once reflected collimated light (second specific wavelength collimated light) is reflected by the second light splitting film, and the twice reflected collimated light (second specific wavelength collimated light) is coupled to the second light receiving chip 5035 via the third lens 50365.

In some embodiments, the light receiving component is configured to receive data light. The light receiving assembly comprises a receiving pipe cap, a receiving pipe seat and a first light splitting device. The receiving pipe cap is covered on the receiving pipe seat. The top of the receiving tube seat is provided with a first light receiving chip and a second light receiving chip. The first light splitting device is fixedly connected with the receiving pipe cap. The first light splitting device comprises a first light splitting piece, a second lens and a third lens. The first light-splitting member has a first light-splitting film and a second light-splitting film. And the second lens is connected with one surface of the first lens body facing the first light receiving chip, is arranged corresponding to the first light receiving chip and is used for coupling the received data light to the first light receiving chip. And the third lens is connected with one surface of the first lens body facing the second light receiving chip, is arranged corresponding to the second light receiving chip and is used for coupling the received data light to the second light receiving chip. The first light splitting film is used for reflecting received data light to the second light splitting film and transmitting the received data light to the fourth lens. And the second light splitting film is arranged opposite to the first light splitting film and is used for reflecting received data light. The data light is incident to the first light-splitting component and is transmitted to the first light-splitting film along the first light-splitting component, the data light is reflected and transmitted at the first light-splitting film, the data light after primary reflection is reflected at the second light-splitting film, and the data light after secondary reflection is coupled to the second light-receiving chip through the third lens. The data light after once transmission is coupled to the first light receiving chip through the second lens. In this application, first beam split device includes first beam split spare and two lenses, and two lenses all with first beam split spare fixed connection, greatly reduced the assembly degree of difficulty of light receiving component, improve the assembly precision of light receiving component, and then improve coupling efficiency. In addition, the first light splitting piece is provided with two light splitting films, the two light splitting films divide received data light into two beams, and the data light after the light splitting is respectively coupled to the corresponding light receiving chip through two lenses fixedly connected with the first light splitting piece, so that the light receiving component realizes a double-channel receiving function.

The light receiving component has a double-channel receiving function. In order for the light receiving assembly to have a three-channel receiving function, in some embodiments, another light receiving assembly is proposed.

Fig. 20 is a block diagram of another light receiving assembly according to some embodiments. Fig. 21 is an exploded view of another light receiving assembly according to some embodiments. Fig. 22 is a cross-sectional view of another light receiving assembly according to some embodiments. As shown in fig. 20-22, in some embodiments, the light receiving assembly 503b also includes a receiving socket 5031, a receiving cap 5032, and a receiving pin 5033. Since the light receiving unit 503a and the receiving tube base 5031, the receiving tube cap 5032 and the receiving pin 5033 of the light receiving unit 503b have the same structure, the functions are the same, and the description thereof is omitted.

In order for the light receiving assembly to implement a three-channel receiving function, in some embodiments, at least two light receiving chips disposed on top of the receiving tube socket include a first light receiving chip 5034, a second light receiving chip 5035, and a third light receiving chip 5037, the first light receiving chip 5034 for converting received first specific wavelength data light into a first current signal, the second light receiving chip 5035 for converting received second specific wavelength data light into a second current signal, and the third light receiving chip 5037 for converting received third specific wavelength data light into a third current signal.

Since the data light incident on the light receiving element 503b is a beam of data light, the first light receiving chip 5034 receives the first specific wavelength data light, the second light receiving chip 5035 receives the second specific wavelength data light, and the third light receiving chip 5037 receives the third specific wavelength data light. In order that the first light receiving chip 5034, the second light receiving chip 5035 and the third light receiving chip 5037 can each receive the corresponding data light with a specific wavelength, in some embodiments, a light splitting device is disposed in a cavity enclosed by the receiving tube base 5031 and the receiving tube cap 5032, and the light splitting device includes a second light splitting device 5038. The second beam splitter 5038 is clamped at the through hole 50321 of the receiving cap 5032.

The second light splitting device 5038 splits one beam of data light incident to the light receiving assembly 503b into three beams of data light, and is coupled to the first light receiving chip 5034, the second light receiving chip 5035, and the third light receiving chip 5037. The first data light split by the second light splitter 5038 is a first specific wavelength data light, the second data light split by the second light splitter 5038 is a second specific wavelength data light, and the third data light split by the second light splitter 5038 is a third specific wavelength data light.

Fig. 23 is a block diagram of another light splitting device according to some embodiments. Fig. 24 is an exploded view of another light splitting device according to some embodiments. Fig. 25 is a cross-sectional view of another light splitting device according to some embodiments. As shown in fig. 23-25, in some embodiments, the second light splitting device 5038 includes a second light splitting element, a fifth lens 50388, a sixth lens 50389, and a seventh lens 50387.

One surface of the second light-splitting member facing the first light-receiving chip 5034 is fixedly connected with the fifth lens 50388, one surface of the second light-splitting member facing the second light-receiving chip 5035 is fixedly connected with the sixth lens 50389, and one surface of the second light-splitting member facing the third light-receiving chip 5037 is fixedly connected with the seventh lens 50387.

The fifth lens 50388, which is a focusing lens, is provided corresponding to the first light receiving chip 5034 and is configured to optically couple the received data to the first light receiving chip 5034.

The sixth lens 50389, which is a focusing lens, is provided corresponding to the second light receiving chip 5035 for coupling the received data light to the second light receiving chip 5035.

The seventh lens 50387, which is a focusing lens, is provided corresponding to the third light receiving chip 5037 for coupling the received data light to the third light receiving chip 5037.

The second beam splitter splits a received beam of data light into three beams of data light, wherein the first beam of data light is data light with a first specific wavelength, the second beam of data light is data light with a second specific wavelength, and the third beam of data light is data light with a third specific wavelength. The first specific wavelength data light is coupled to the first light receiving chip 5034 via the fifth lens 50388. The second specific wavelength data light is coupled to the second light receiving chip 5035 via the sixth lens 50389. The third specific wavelength data light is coupled to the third light receiving chip 5037 via the seventh lens 50387.

In some embodiments, the second light splitting device comprises a second light splitting part and three lenses, and the three lenses are fixedly connected with the second light splitting part, so that the assembly difficulty of the light receiving assembly is greatly reduced, the assembly precision of the light receiving assembly is improved, and the coupling efficiency is improved.

In some embodiments, second light splitting device 5038 includes fourth lens 50386 in addition to second light splitting element, fifth lens 50388, sixth lens 50389, and seventh lens 50387.

One surface of the second light-splitting member facing away from the first light-receiving chip 5034 is fixedly connected with the fourth lens 50386, one surface of the second light-splitting member facing toward the first light-receiving chip 5034 is fixedly connected with the fifth lens 50388, one surface of the second light-splitting member facing toward the second light-receiving chip 5035 is fixedly connected with the sixth lens 50389, and one surface of the second light-splitting member facing toward the third light-receiving chip 5037 is fixedly connected with the seventh lens 50387.

The fourth lens 50386, which is a collimating lens, is provided corresponding to the fifth lens 50388 and collimates the received data light.

The fourth lens 50386 collimates a beam of data incident on the second light splitting device 5038, and the second light splitting device splits the received beam of collimated light into three beams of collimated light, wherein the first beam of collimated light is collimated light of a first specific wavelength, the second beam of collimated light is collimated light of a second specific wavelength, and the third beam of collimated light is collimated light of a third specific wavelength. The first specific wavelength collimated light is coupled to the first light receiving chip 5034 via the fifth lens 50388. The second specific wavelength collimated light is coupled to the second light receiving chip 5035 via a sixth lens 50389. The third specific wavelength collimated light is coupled to the third light receiving chip 5037 via a seventh lens 50387.

The second light-splitting device comprises a second light-splitting component and three focusing lenses, so that the data light received by the second light-splitting device can be collimated light or emitted light. In order to improve the coupling efficiency of the light receiving assembly, the data light received by the second light splitting device including the second light splitting member and the three focusing lenses is collimated light.

The second light-splitting device comprises a second light-splitting component, a collimating lens and three focusing lenses, so that the data light received by the second light-splitting device can be collimated light or converged light. Since the collimator lens is used for collimating the received data light entering the second light-splitting device, in order to avoid waste, the data light received by the second light-splitting device including the second light-splitting device, one collimator lens and three focusing lenses is divergent light.

In some embodiments, the second light splitting member has a third light splitting film, a fourth light splitting film, a fifth light splitting film, and a sixth light splitting film.

The fourth light splitting film is located between the third light splitting film and the fifth lens 50388. The fifth light-splitting film and the sixth light-splitting film are respectively positioned at two sides of the third light-splitting film or the fourth light-splitting film.

The third light-splitting film is used for transmitting the first specific wavelength data light and the third specific wavelength data light in the received data light to the fourth light-splitting film and also used for reflecting the second specific wavelength data light in the received data light to the sixth light-splitting film. The fourth light-splitting film is configured to transmit the first specific wavelength data light of the received data light to the fifth lens 50388, and is also configured to reflect the third specific wavelength data light of the received data light to the fifth light-splitting film. The fifth light splitting film is for reflecting the third specific wavelength data light to the seventh lens 50387. The sixth light splitting film is for reflecting the second specific wavelength data light to the sixth lens 50389.

The first specific wavelength data light and the third specific wavelength data light in the data light are transmitted to the fourth light splitting film through the third light splitting film, the first specific wavelength data light is transmitted to the fifth lens 50388 through the fourth light splitting film, the second specific wavelength data light in the data light is reflected to the sixth light splitting film through the third light splitting film, the second specific wavelength data light is reflected to the sixth lens 50389 through the sixth light splitting film, the third specific wavelength data light is reflected to the fifth light splitting film through the fourth light splitting film, and the third specific wavelength data light is reflected to the seventh lens 50387 through the fifth light splitting film.

In some embodiments, the second light splitting member has four light splitting films, the four light splitting films split the received data light into three beams, and the split data light is respectively coupled to the corresponding light receiving chips through three lenses fixedly connected with the second light splitting member, so that the light receiving component realizes a three-channel receiving function.

In some embodiments, the second light splitting element includes a third light guiding element 50381, a fourth light guiding element 50382, a fifth light guiding element 50383, a sixth light guiding element 50384 and a seventh light guiding element 50385, where the third light guiding element 50381, the fourth light guiding element 50382 and the fifth light guiding element 50383 are sequentially connected to form a sub-light splitting element, and the sixth light guiding element 50384 and the seventh light guiding element 50385 are respectively located at two sides of the sub-light splitting element and are respectively connected to the sub-light splitting element.

One surface of the third light guide member 50381 facing away from the first light receiving chip 5034 is fixedly connected with the fourth lens 50386, and the surface facing the fourth light guide member 50382 is connected with the fourth light guide member 50382.

One surface of fourth light guide 50382 facing third light guide 50381 is connected to third light guide 50381, and one surface facing fifth light guide 50383 is connected to fifth light guide 50383.

A third light splitting film is provided on a surface of the third light guide 50381 facing the fourth light guide 50382 or on a surface of the fourth light guide 50382 facing the third light guide 50381.

One surface of the fifth light guide member 50383 facing the fourth light guide member 50382 is connected to the fourth light guide member 50382, and one surface facing the first light receiving chip 5034 is fixedly connected to the fifth lens 50388.

A fourth light splitting film is provided on a surface of the fourth light guide 50382 facing the fifth light guide 50383 or on a surface of the fifth light guide 50383 facing the fourth light guide 50382.

One surface of the sixth light guide 50384 facing the third light guide 50381 is connected to one surfaces of the third light guide 50381, the fourth lens 50386 and the fifth light guide 50383, a fifth light splitting film is disposed on one surface facing away from the third light receiving chip 5037, and a seventh lens 50387 is fixedly connected to one surface facing the third light receiving chip 5037.

One surface of the seventh light guide 50385 facing the third light guide 50381 is connected to one surfaces of the third light guide 50381, the fourth lens 50386 and the fifth light guide 50383, a sixth light splitting film is disposed on one surface facing away from the second light receiving chip 5035, and the sixth lens 50389 is fixedly connected to one surface facing the second light receiving chip 5035.

In some embodiments, third light guide 50381 includes a tenth connecting surface, an eleventh connecting surface, a twelfth connecting surface, and a thirteenth connecting surface that are sequentially connected such that the tenth connecting surface, the eleventh connecting surface, the twelfth connecting surface, and the thirteenth connecting surface are sequentially connected such that a front view of third light guide 50381 is trapezoidal.

The tenth connection surface is a surface of the third light guide member 50381 facing away from the first light receiving chip 5034 and is fixedly connected to the fourth lens 50386. The twelfth connection surface is a surface of the third light guide member 50381 facing the fourth light guide member 50382, and is bonded to the fourth light guide member 50382.

In order to collimate the data light as much as possible by the fourth lens 50386 to increase the coupling efficiency, in some embodiments, the tenth connection face is parallel to the top of the receiving header 5031.

In some embodiments, the fourth light guide 50382 includes a fourteenth connection face, a fifteenth connection face, a sixteenth connection face, and a seventeenth connection face that are sequentially connected, such that the fourth light guide 50382 has a trapezoidal front view.

The fourteenth connection surface is a surface of the fourth light guide 50382 facing the third light guide 50381, and is bonded to the twelfth connection surface. The fourteenth connection surface, or the twelfth connection surface, is provided with a third light-splitting film. The fifteenth connection surface is connected with the eleventh connection surface. The sixteenth connection surface is a surface of the fourth light guide 50382 facing the fifth light guide 50383, and is connected to the fifth light guide 50383. The seventeenth connection face is connected to the thirteenth connection face.

In some embodiments, fifth light guide 50383 comprises an eighteenth connecting surface, a nineteenth connecting surface, and a twentieth connecting surface that are sequentially connected, such that fifth light guide 50383 is triangular in front view.

The eighteenth connection surface is a surface of the fifth light guide 50383 facing the fourth light guide 50382, and is connected to the sixteenth connection surface. The eighteenth connection face, or the sixteenth connection face, is provided with a fourth light-splitting film. The nineteenth connection surface is a surface of the fifth light guide 50383 facing the first light receiving chip 5034 and is fixedly connected to the fifth lens 50388. The twentieth connecting surface, the seventeenth connecting surface and the thirteenth connecting surface are connected in order.

In order to make the data light coupled by the fifth lens 50388 as much as possible to improve coupling efficiency, in some embodiments, the nineteenth connection surface is parallel to the top of the receiving tube holder 5031.

In some embodiments, sixth light guide 50384 includes a twenty-first connecting surface, a twenty-second connecting surface, a twenty-third connecting surface, and a twenty-fourth connecting surface that are sequentially connected, such that the twenty-first connecting surface, the twenty-second connecting surface, the twenty-third connecting surface, and the twenty-fourth connecting surface are sequentially connected, such that a front view of sixth light guide 50384 is trapezoidal.

The twenty-first connection surface is a surface of the sixth light guide 50384 facing away from the third light receiving chip 5037, and a fifth light splitting film is provided. The twenty-third connection surface is a surface of the sixth light guide 50384 facing the third light receiving chip 5037 and is fixedly connected to the seventh lens 50387. The twenty-fourth connection surface is connected to the fifteenth connection surface and the eleventh connection surface, respectively.

In order to couple the data light as much as possible by the seventh lens 50387 to increase coupling efficiency, in some embodiments, the twenty-third connection face is parallel to the top of the receiving header 5031.

In some embodiments, seventh light guide 50385 includes a twenty-fifth connecting surface, a twenty-sixth connecting surface, a twenty-seventh connecting surface, and a twenty-eighth connecting surface that are sequentially connected, such that the twenty-fifth connecting surface, the twenty-sixth connecting surface, the twenty-seventh connecting surface, and the twenty-eighth connecting surface are sequentially connected, such that a front view of seventh light guide 50385 is trapezoidal.

The twenty-fifth connection surface is a surface of the seventh light guide 50385 facing away from the second light receiving chip 5035, and is provided with a sixth light splitting film. The twenty-sixth connecting surface is connected with the thirteenth connecting surface, the seventeenth connecting surface and the twentieth connecting surface, respectively. The twenty-seventh connection surface is a surface of the seventh light guide 50385 facing the second light receiving chip 5035 and is fixedly connected to the sixth lens 50389.

In order to couple the data light as much as possible by the sixth lens 50389 to increase coupling efficiency, in some embodiments, the twenty-seventh connection face is parallel to the top of the receiving header 5031.

The positions of the first light receiving chip 5034 and the second light receiving chip 5035 are fixed, and in order to split the received data light by the second light splitter and couple the split two data light beams to the first light receiving chip 5034 and the second light receiving chip 5035 through a lens, in some embodiments, the angles between the face of the third light splitting film and the face of the sixth light splitting film and the top of the receiving tube base are 15 ° -35 °.

In order for the second light receiving chip 5039 to receive as much data light as possible, in some embodiments, an angle between a face where the third light splitting film is located and a face where the sixth light splitting film is located is less than 3 °. Further, an included angle between the face where the first light-splitting film is located and the face where the second light-splitting film is located is 0 °.

The positions of the first light receiving chip 5034 and the second light receiving chip 5035 are fixed, and in order for the second light splitting member to split the received data light transmitted by the third light splitting film and for the two split data light beams to be coupled to the first light receiving chip 5034 and the third light receiving chip 5037 via a lens, in some embodiments, the angles between the face on which the fourth light splitting film is located and the face on which the fifth light splitting film is located and the top of the receiving tube seat are each 10 ° -30 °.

In order for the third light receiving chip 5037 to receive as much data light as possible, in some embodiments, an angle between a plane where the fourth light splitting film is located and a plane where the fifth light splitting film is located is less than 3 °. Further, an included angle between the face where the first light-splitting film is located and the face where the second light-splitting film is located is 0 °.

Fig. 26 is an optical path diagram of another light receiving assembly according to some embodiments. As shown in fig. 26, in some embodiments, the data light is incident on a fourth lens 50386 and collimated by a fourth lens 50386. The collimated light is incident on the second light-splitting member and transmitted to the third light-splitting film along the third light-guiding member 50381 of the second light-splitting member. The collimated light is reflected and transmitted by the third light-splitting film, the once-reflected collimated light (second specific wavelength collimated light) is reflected by the sixth light-splitting film, and the twice-reflected collimated light (second specific wavelength collimated light) is coupled to the second light-receiving chip 5035 via the sixth lens 50389. The first-transmitted collimated light (including the first specific wavelength collimated light and the second specific wavelength collimated light) is reflected and transmitted by the fourth light splitting film, and the second-transmitted collimated light (the first specific wavelength collimated light) is coupled to the first light receiving chip 5034 via the fifth lens 50388. The first transmitted and then reflected collimated light (third specific wavelength collimated light) is reflected by the fifth light splitting film and then coupled to the third light receiving chip 5037 via the seventh lens 50387.

In some embodiments, a light receiving assembly includes a receiving cap, a receiving socket, and a second light splitting device. The receiving tube cap is covered on the receiving tube seat, and the top of the receiving tube seat is provided with a first light receiving chip, a second light receiving chip and a third light receiving chip. The second light splitting device is fixedly connected with the receiving pipe cap. The second light splitting device comprises a second light splitting piece, a fifth lens, a fourth lens and a seventh lens. The second light-splitting member has a third light-splitting film, a fourth light-splitting film, a fifth light-splitting film, and a sixth light-splitting film. And the fifth lens is connected with one surface of the second light splitting piece facing the first light receiving chip and is used for coupling the received data light to the first light receiving chip. And the fourth lens is connected with one surface of the second light splitting piece facing the second light receiving chip and is used for coupling the received data light to the second light receiving chip. And the seventh lens is connected with one surface of the second light splitting piece, which faces the third light receiving chip, and is used for coupling the received data light to the third light receiving chip. The third light-splitting film is used for reflecting the received data light to the sixth light-splitting film and transmitting the received data light to the fourth light-splitting film. And the fourth light-splitting film is positioned between the third light-splitting film and the fifth lens, and is used for reflecting the received data light to the fifth light-splitting film and transmitting the received data light to the fifth lens. And the fifth light splitting film is used for reflecting the received data light to the seventh lens. The sixth light splitting film and the fifth light splitting film are respectively positioned at two sides of the third light splitting film or the fourth light splitting film and used for reflecting received data light to the fourth lens. The data light is incident to the second light splitting component and is transmitted to the third light splitting film along the second light splitting component, the data light is reflected and transmitted by the third light splitting film, the data light after primary reflection is reflected by the sixth light splitting film, and the data light after secondary reflection is coupled to the second light receiving chip through the fourth lens. The data light after primary transmission is reflected and transmitted by the fourth light splitting film, and the data light after secondary transmission is coupled to the first light receiving chip through the fifth lens. The data light transmitted and reflected first is reflected by the fifth light splitting film and then coupled to the third light receiving chip through the seventh lens. In some embodiments, the second light splitting member is provided with a plurality of light splitting films, the plurality of light splitting films split the received data light into three beams, and the split data light is respectively coupled to the corresponding light receiving chip through a plurality of lenses fixedly connected with the second light splitting member, so that the light receiving component realizes a three-channel receiving function. In addition, the second light splitting device comprises a second light splitting part and a plurality of lenses, and the lenses are fixedly connected with the second light splitting part, so that the assembly difficulty of the light receiving assembly is greatly reduced, the assembly precision of the light receiving assembly is improved, and the coupling efficiency is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An optical module, comprising:

a light receiving assembly for receiving data light; wherein the light receiving assembly comprises:

a receiving tube seat, the top of which is provided with a first light receiving chip and a second light receiving chip;

the receiving pipe cap is covered on the receiving pipe seat;

the first light splitting device is fixedly connected with the receiving pipe cap; wherein the first spectroscopic device includes:

a second lens;

a third lens;

the first light splitting piece is fixedly connected with the second lens and the third lens and is provided with a first light splitting film and a second light splitting film;

a first light-splitting film for reflecting the received data light to the second light-splitting film and transmitting the received data light to the second lens; the second lens is used for coupling the received data light to the first light receiving chip;

The second light splitting film is arranged opposite to the first light splitting film and is used for reflecting received data light to the third lens; the third lens is used for coupling the received data light to the second light receiving chip.

2. The optical module of claim 1, wherein the first light splitting device further comprises:

and the first lens is connected with one surface of the first light splitting piece, which is opposite to the first light receiving chip, and is arranged opposite to the second lens and used for collimating received data light.

3. The optical module of claim 1, wherein the angles between the face of the first light splitting film and the face of the second light splitting film and the top of the receiving header are each 15 ° -35 °.

4. A light module as recited in claim 3, wherein an angle between a face of the first light-splitting film and a face of the second light-splitting film is less than 3 °.

5. The optical module of claim 2, wherein the first light splitting member comprises:

a first light guide member having the second light splitting film, the surface facing the second light receiving chip being connected to the third lens;

the second light guide piece is connected with the first light guide piece, and one surface facing the first light receiving chip is connected with the second lens;

One surface of the first light guide piece connected with the second light guide piece, or one surface of the second light guide piece connected with the first light guide piece, is provided with the first light splitting film.

6. The optical module of claim 2, wherein the first lens, the second lens, and the third lens are all fixed to the first light splitting member by glue.

7. The optical module of claim 2, wherein the first lens, the second lens, and the third lens are each fixed to the first light-splitting member by molding.

8. The light module of claim 1 wherein the receiving cap has:

and the through hole is used for clamping the first light-splitting device.

9. The optical module of claim 8, wherein a length dimension of the through hole is greater than a length dimension of the first light splitting device, and a width dimension of the through hole is greater than a width dimension of the first light splitting device.

10. The optical module of claim 1, further comprising:

the circuit board, the surface is provided with:

a substrate is provided with:

the clamping groove is used for clamping the light receiving component;

The object placing groove is formed by inwards sinking the upper surface of the circuit board, is correspondingly arranged with the clamping groove, and forms a clamping area with the clamping groove so as to be convenient for clamping the light receiving component.