CN217606135U - Optical module - Google Patents

Abstract

The optical module comprises an optical assembly and an optical fiber adapter, wherein the optical assembly comprises a second tube shell, a first lens, a beam splitter assembly, a first light receiving device and a second light receiving device, the second tube shell comprises an inner cavity, and the first lens arranged in the inner cavity is in active coupling connection with a converging lens at the end part of the optical fiber adapter; a protruded fixing platform is arranged on the second tube shell, an inclined mounting platform communicated with the second tube shell is arranged in the fixing platform, and the first light receiving device is arranged on the mounting platform, so that a preset angle is formed between the first light receiving device and the second tube shell; the optical splitter component is arranged between the first lens and the converging lens, comprises a fourth optical splitter, a fifth optical splitter and a sixth optical splitter, is used for reflecting and splitting received light with different wavelengths transmitted by the optical fiber adapter, and respectively emits the split light into the first light receiving device and the second light receiving device; the second light receiving device is inserted into the second package. The lens and the light splitting design are innovated, the size of the light receiving and transmitting assembly is reduced, and the small-size design of the light module is facilitated.

Description

Optical module

Technical Field

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

Background

With the development of new services and application modes such as cloud computing, mobile internet, video and the like, the development and progress of the optical communication technology becomes more and more important. In the optical communication technology, an optical module is a tool for realizing the interconversion of optical signals and is one of key devices in optical communication equipment, and the transmission rate of the optical module is continuously increased along with the development requirement of the optical communication technology. In a high-speed information transceiving system, a high-density optical module is required to replace a traditional optical module, and a multi-channel optical transceiving technology is used, so that more transmitters and receivers can be concentrated in a smaller space. In such a high-speed transceiver module, a core component is a BOSA (Bi-Directional Optical Sub-Assembly) structure in an Optical module.

The commonly used BOSA structure comprises a tube body, a light emitting device, a light receiving device and an optical fiber adapter, wherein the light emitting device is arranged on one side of the tube body, the optical fiber adapter is arranged on the other side of the tube shell, the light receiving device is arranged on the third side of the tube body, an optical filter is arranged in the tube body, light beams emitted by the light emitting device penetrate through the optical filter and are coupled to the optical fiber adapter, and light beams transmitted by the optical fiber adapter enter the light receiving device after being reflected by the optical filter.

However, such BOSA structure includes a large number of components and parts, and is disadvantageous to the volume miniaturization design of the optical transceiver module due to the high complexity of the structure.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical module, which is used for reducing the volume of an optical transceiving component in the optical module so as to be beneficial to the volume miniaturization design of the optical module.

The application provides an optical module, including:

a circuit board;

an optical assembly electrically connected to the circuit board;

a fiber optic adapter connected to the optical assembly;

wherein the light assembly comprises:

the second tube shell comprises an inner cavity, a first light outlet, a second light outlet and a light receiving and transmitting port, wherein the first light outlet, the second light outlet and the light receiving and transmitting port are communicated with the inner cavity; a protruding fixing table is arranged on the light source, a mounting groove is formed in the fixing table, an opening is formed in one end of the mounting groove, an inclined mounting platform is arranged at the other end of the mounting groove, and the mounting platform is communicated with the first light outlet; along the light receiving direction injected by the optical fiber adapter, the distance between the mounting platform and the central axis of the second tube shell is gradually increased;

the first lens is arranged in the inner cavity and is in active coupling connection with the converging lens at the end part of the optical fiber adapter;

the optical splitter component is arranged between the first lens and the converging lens, comprises a fourth optical splitter, a fifth optical splitter and a sixth optical splitter and is used for reflecting and splitting received light with different wavelengths transmitted by the optical fiber adapter;

the first light receiving device is arranged on the mounting platform, has a preset angle with the second tube shell and is used for receiving the received light reflected by the fourth optical splitter and the fifth optical splitter and transmitted by the sixth optical splitter;

and the second light receiving device is inserted into the second light outlet and used for receiving the received light reflected by the fourth optical splitter and transmitted by the fifth optical splitter.

As can be seen from the foregoing embodiments, an optical module provided in the embodiments of the present application includes a circuit board, an optical assembly electrically connected to the circuit board, and an optical fiber adapter connected to the optical assembly, where the optical assembly includes a second tube shell, a first lens, an optical splitter assembly, a first optical receiver and a second optical receiver, the second tube shell includes an inner cavity, and a first light outlet, a second light outlet, and a light receiving and transmitting port that are communicated with the inner cavity, the second optical receiver is inserted into the inner cavity through the second light outlet, and the optical fiber adapter is inserted into the inner cavity through the light receiving and transmitting port, so that received light transmitted by the optical fiber adapter is emitted into the second tube shell; a protruding fixing table is arranged on the second tube shell, a mounting groove is formed in the fixing table, an opening is formed in one end of the mounting groove, an inclined mounting platform is arranged at the other end of the mounting groove, the mounting platform is communicated with the first light outlet, and the distance between the mounting platform and the central axis of the second tube shell is gradually increased along the light receiving direction injected by the optical fiber adapter; the first light receiving device is arranged on the mounting platform, so that a preset angle is formed between the first light receiving device and the second tube shell, the number of optical splitters in the second tube shell can be reduced, and the volume of the second tube shell can be reduced; the first lens is arranged in the inner cavity of the second tube shell and is in active coupling connection with the converging lens at the end part of the optical fiber adapter, so that the requirement on the position of the first lens is not high, and the assembly precision of an optical component can be reduced; the optical splitter component is arranged between the first lens and the converging lens and comprises a fourth optical splitter, a fifth optical splitter and a sixth optical splitter, wherein the fourth optical splitter, the fifth optical splitter and the sixth optical splitter are used for reflecting and splitting received light with different wavelengths transmitted by the optical fiber adapter, namely the received light with different wavelengths is reflected to the fifth optical splitter through the fourth optical splitter, the fifth optical splitter transmits the reflected received light, and the transmitted received light is emitted into the second light receiving device; the fifth beam splitter reflects the other reflected received light again, and the reflected received light is directly transmitted through the sixth beam splitter and enters the first light receiving device. According to the optical assembly, the assembly precision of the optical assembly can be reduced through the first lens and the converging lens which are in active coupling, and the coupling efficiency of the optical assembly is improved; the innovative light splitting design can realize the dense wave splitting function with smaller wavelength difference, and the second tube shell has fewer parts and simple structure, can reduce the volume of the light receiving and transmitting assembly, and is favorable for the volume miniaturization design of the optical module.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings required to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to these drawings. Furthermore, the drawings in the following description may be considered as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

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

FIG. 2 is a block diagram of an optical network terminal according to some embodiments;

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

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

FIG. 5 is a schematic diagram of an optical transceiver module in an optical module according to some embodiments;

FIG. 6 is an exploded schematic view of an optical transceiver module in an optical module according to some embodiments;

FIG. 7 is a schematic diagram of a package in an optical module according to some embodiments;

fig. 8 is another schematic angular structure diagram of a tube shell in an optical module according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a third angle α of a tube shell in an optical module according to an embodiment of the present application;

fig. 10 is a cross-sectional view of a tube shell in an optical module according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a support frame in an optical module according to an embodiment of the present disclosure;

fig. 12 is a schematic view of another angular structure of a support frame in an optical module according to an embodiment of the present disclosure;

fig. 13 is a cross-sectional view of a support frame in an optical module according to an embodiment of the present disclosure;

fig. 14 is an assembled cross-sectional view of an optical splitter assembly and a fiber adapter in an optical module according to an embodiment of the present disclosure;

fig. 15 is a schematic diagram of a receiving optical path of an optical module according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a bracket in an optical module according to an embodiment of the present application;

fig. 17 is another schematic angular structure diagram of a bracket in an optical module according to an embodiment of the present disclosure;

fig. 18 is a cross-sectional view of an optical transceiver in an optical module according to an embodiment of the present disclosure;

fig. 19 is a schematic structural diagram of another optical transceiver in an optical module according to an embodiment of the present disclosure;

fig. 20 is an exploded schematic view of another optical transceiver in an optical module according to an embodiment of the present disclosure;

fig. 21 is a schematic structural diagram of another tube shell in an optical module according to an embodiment of the present disclosure;

fig. 22 is a schematic view of another angle structure of another tube shell in an optical module according to an embodiment of the present disclosure;

fig. 23 is a cross-sectional view of another tube shell in an optical module according to an embodiment of the present disclosure;

fig. 24 is another angle cross-sectional view of another tube shell in an optical module according to an embodiment of the present disclosure;

fig. 25 is a cross-sectional view of another optical transceiver in an optical module according to an embodiment of the present disclosure;

fig. 26 is a schematic structural diagram of a light receiving device in an optical module according to an embodiment of the present application.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

In an optical communication system, an optical signal is used to carry information to be transmitted, and the optical signal carrying the information is transmitted to information processing equipment such as a computer through information transmission equipment such as an optical fiber or an optical waveguide, so as to complete information transmission. Since light has a passive transmission characteristic when transmitted through an optical fiber or an optical waveguide, low-cost, low-loss information transmission can be realized. Since a signal transmitted by an information transmission device such as an optical fiber or an optical waveguide is an optical signal and a signal that can be recognized and processed by an information processing device such as a computer is an electrical signal, it is necessary to perform interconversion between the electrical signal and the optical signal in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer.

The optical module realizes the function of interconversion between the optical signal and the electrical signal in the technical field of optical communication. The optical module comprises an optical port and an electrical port, the optical module realizes optical communication with information transmission equipment such as optical fibers or optical waveguides and the like through the optical port, realizes electrical connection with an optical network terminal (such as an optical modem) through the electrical port, and the electrical connection is mainly used for power supply, I2C signal transmission, data information transmission, grounding and the like; the optical network terminal transmits the electric signal to the information processing equipment such as a computer through a network cable or a wireless fidelity (Wi-Fi).

Fig. 1 is a connection diagram of an optical communication system. As shown in fig. 1, the optical communication system includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101, and a network cable 103.

One end of the optical fiber 101 is connected to the remote server 1000, and the other end is connected to the optical network terminal 100 through the optical module 200. The optical fiber itself can support long-distance signal transmission, for example, signal transmission of thousands of meters (6 km to 8 km), on the basis of which if a repeater is used, theoretically infinite distance transmission can be realized. Therefore, in a typical optical communication system, the distance between the remote server 1000 and the optical network terminal 100 may be several kilometers, tens of kilometers, or hundreds of kilometers.

One end of the network cable 103 is connected to the local information processing device 2000, and the other end is connected to the optical network terminal 100. The local information processing apparatus 2000 may be any one or several of the following apparatuses: router, switch, computer, cell-phone, panel computer, TV set etc..

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

The optical module 200 includes an optical port configured to access the optical fiber 101 and an electrical port, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101; the electrical port is configured to be accessed into the optical network terminal 100, so that the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. The optical module 200 converts an optical signal and an electrical signal to each other, so that an information connection is established between the optical fiber 101 and the optical network terminal 100. For example, an optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input to the optical network terminal 100, and an electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input to the optical fiber 101. Since the optical module 200 is a tool for implementing the interconversion between the optical signal and the electrical signal, and has no function of processing data, information is not changed in the above-mentioned photoelectric conversion process.

The optical network terminal 100 includes a housing (housing) having a substantially rectangular parallelepiped shape, and an optical module interface 102 and a network cable interface 104 provided on the housing. The optical module interface 102 is configured to access the optical module 200, so that the ont 100 establishes a bidirectional electrical signal connection with the optical module 200; the network cable interface 104 is configured to access the network cable 103 such that the optical network terminal 100 establishes a bi-directional electrical signal connection with the network cable 103. The optical module 200 is connected to the network cable 103 via the optical network terminal 100. For example, the onu 100 transmits the electrical signal from the optical module 200 to the network cable 103, and transmits the electrical signal from the network cable 103 to the optical module 200, so that the onu 100 can monitor the operation of the optical module 200 as an upper computer of the optical module 200. The upper computer of the Optical module 200 may include an Optical Line Terminal (OLT) in addition to the Optical network Terminal 100.

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

Fig. 2 is a configuration diagram of the optical network terminal, and fig. 2 only shows a configuration of the optical module 200 of the optical network terminal 100 in order to clearly show a connection relationship between the optical module 200 and the optical network terminal 100. As shown in fig. 2, the optical network terminal 100 further includes a circuit board 105 disposed within the housing, a cage 106 disposed on a surface of the circuit board 105, a heat sink 107 disposed on the cage 106, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access an electrical port of the optical module 200; the heat sink 107 has a projection such as a fin that increases a heat radiation area.

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

Fig. 3 is a block diagram of a light module according to some embodiments, and fig. 4 is an exploded view of a light 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 in the housing, and an optical transceiver module 400.

The shell comprises an upper shell 201 and a lower shell 202, wherein the upper shell 201 is covered on the lower shell 202 to form the shell with two openings; the outer contour of the housing generally appears square.

In some embodiments of the present disclosure, the lower housing 202 includes a bottom plate and two lower side plates located at both sides of the bottom plate and disposed perpendicular to the bottom plate; the upper case 201 includes a cover plate covering both lower side plates of the lower case 202 to form the above case.

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

The direction of the connecting line of the two openings 204 and 205 may be the same as the length direction of the optical module 200, or may not be the same as the length direction of the optical module 200. For example, the opening 204 is located at an end portion (right end in fig. 3) of the optical module 200, and the opening 205 is also located at an end portion (left end in fig. 3) of the optical module 200. Alternatively, the opening 204 is located at an end of the optical module 200, and the opening 205 is located at a side of the optical module 200. The opening 204 is an electrical port, and a gold finger of the circuit board 300 extends out of the electrical port 204 and is inserted into an upper computer (for example, the optical network terminal 100); the opening 205 is an optical port configured to access the external optical fiber 101, so that the external optical fiber 101 is connected to the optical transceiver module 400 inside the optical module 200.

The upper shell 201 and the lower shell 202 are combined to facilitate the installation of the components such as the circuit board 300 and the optical transceiver module 400 into the shells, and the upper shell 201 and the lower shell 202 form encapsulation protection for the components. In addition, when the components such as the circuit board 300 and the optical transceiver module 400 are assembled, the positioning components, the heat dissipation components and the electromagnetic shielding components of the components are convenient to arrange, and the automatic production is facilitated.

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

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

Illustratively, the unlocking member 203 is located on the outer walls of the two lower side plates of the lower housing 202, and has a snap-fit member that mates with a host cage (e.g., the cage 106 of the optical network terminal 100). When the optical module 200 is inserted into the cage of the upper computer, the optical module 200 is fixed in the cage of the upper computer 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, and the connection relationship between the engaging member and the upper computer is changed, so that the engagement relationship between the optical module 200 and the upper computer is released, and the optical module 200 can be drawn out from the cage of the upper computer.

The circuit board 300 includes circuit traces, electronic components, and chips, and the electronic components and the chips are connected together by the circuit traces according to a circuit design to implement functions of power supply, electrical signal transmission, grounding, and the like. Examples of the electronic components include capacitors, resistors, transistors, and Metal-Oxide-Semiconductor Field-Effect transistors (MOSFETs). The chip includes, for example, a Micro Controller Unit (MCU), a laser driver chip, a limiting amplifier (limiting amplifier), a Clock and Data Recovery (CDR) chip, a power management chip, and a Digital Signal Processing (DSP) chip.

The circuit board 300 is generally a rigid circuit board, which can also perform a bearing function due to its relatively rigid material, for example, the rigid circuit board can stably bear the electronic components and chips; when the optical transceiver component is positioned on the circuit board, the rigid circuit board can also provide smooth bearing; the rigid circuit board can also be inserted into an electric connector in the cage of the upper computer.

The circuit board 300 further includes a gold finger formed on an end surface thereof, the gold finger being composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106 and electrically connected to the electrical connector in the cage 106 by gold fingers. The gold fingers may be disposed on only one side of the circuit board 300 (e.g., the upper surface shown in fig. 4), or may be disposed on both upper and lower sides of the circuit board 300, so as to adapt to the situation where the requirement of the number of pins is large. The golden finger is configured to establish an electrical connection with the upper computer to realize 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. Flexible circuit boards are commonly used in conjunction with rigid circuit boards to supplement the rigid circuit boards. For example, a flexible circuit board may be used to connect the rigid circuit board and the optical transceiver module.

The optical transceiver component 400 includes a light emitting device configured to enable emission of an optical signal and a light receiving device configured to enable reception of the optical signal. Illustratively, the light emitting device and the light receiving device are combined together to form an integrated light transceiving component.

Example one

Fig. 5 is a schematic structural diagram of an optical transceiver module in an optical module according to an embodiment of the present disclosure, and fig. 6 is an exploded schematic diagram of an optical transceiver module in an optical module according to an embodiment of the present disclosure. As shown in fig. 5 and 6, an optical module provided in this embodiment of the present application includes an optical transceiver module 400, where the optical transceiver module 400 may include a first package 410, an optical transmitter and an optical receiver, the first package 410 includes an incident optical port, a transceiver optical port and a receiving optical port, the optical transmitter is connected to the first package 410 through the incident optical port, the optical receiver is connected to the first package 410 through the receiving optical port, and an optical fiber adapter 500 is connected to the first package 410 through the transceiver optical port, and the optical fiber adapter 500 may serve as a connector of an optical fiber, allowing the optical fiber to be accessed through the optical port. Thus, the light beam emitted by the light emitting device is emitted into the first package 410 through the incident light port, and the emitted light beam is coupled to the optical fiber adapter 500 through the first package 410 via the light port of the transceiver, so that the emission of light is realized; the receiving light beam transmitted by the optical fiber adapter 500 is emitted into the first package 410 through the transceiver optical port, and then transmitted to the light receiving device through the receiving optical port via the first package 410, so as to implement light receiving.

In some embodiments, the optical transceiver module 400 may include only one light emitting device and one light receiving device, the first package 410 may include only one incident light port, one transceiver integrated light port and one receiving light port, one light emitting device is connected to the first package 410 through the incident light port, one light receiving device is connected to the first package 410 through the receiving light port, and the optical fiber adapter 500 is connected to the first package 410 through the transceiver integrated light port, so that one light emitting and one light receiving of the optical transceiver module 400 can be realized.

In some embodiments, the optical transceiver module 400 may further include two light emitting devices and two light receiving devices, the first package 410 includes two incident light ports, two receiving light ports, and one transceiver integrated light port, that is, the optical transceiver module 400 includes a first light emitting device 420, a second light emitting device 430, a first light receiving device 440, and a second light receiving device 450, the first package 410 includes a first incident light port, a second incident light port, a first receiving light port, a second receiving light port, and a transceiver integrated light port, the first light emitting device 420 is connected to the first package 410 through the first incident light port, the second light emitting device 430 is connected to the first package 410 through the second incident light port, the first light receiving device 440 is connected to the first package 410 through the first receiving light port, the second light receiving device 450 is connected to the first package 410 through the second package receiving light port, and the optical fiber adapter 500 is connected to the first package 410 through the transceiver integrated light port.

In some embodiments, the second light emitting device 430 is designed in an innovative and optimized structure, and materials such as a TO56 1490header and a pipe cap which are common TO the low-speed GPON OLT are adopted, so that low cost and universal design of products are realized.

The first incident light port is located on the left side of the first case 410, the second incident light port is located on the upper side of the first case 410, the first receiving light port is located on the upper side of the first case 410, the second receiving light port is located on the lower side of the first case 410, and the transceiver integrated light port is located on the right side of the first case 410. That is, the first incident light port and the transceiver integrated light port are disposed opposite to each other, the second incident light port and the first receiving light port are disposed on the same side of the first case 410, and the first receiving light port and the second receiving light port are disposed opposite to each other.

Since the emitting direction of the light beam emitted by the first light emitting device 420 and the light beam receiving direction of the optical fiber adapter 500 are located in the same direction, that is, the emitting direction of the first light emitting device 420 is parallel to the circuit board 300, and the light receiving direction of the optical fiber adapter 500 is also parallel to the circuit board 300, in this way, the light beam emitted by the first light emitting device 420 is emitted into the first package 410 through the first incident light port, and the emitted light beam is directly coupled into the optical fiber adapter 500 through the first package 410, thereby realizing the emission of one path of light.

In some embodiments, the light-emitting end of the first light emitting device 420 is provided with a coupling lens, and the laser beam emitted by the laser in the first light emitting device 420 is converted into a converging beam through the coupling lens, and the converging beam is emitted into the first package 410 through the first incident light port.

In some embodiments, the first light emitting device 420 emits the first light beam along a central axis of the all-in-one light port such that the first light beam is launched into the fiber optic adapter 500 through the first tube housing 410. The central axis of the integrated optical transceiver port is an axis passing through the center of the integrated optical transceiver port and perpendicular to the plane of the integrated optical transceiver port.

Since the emission direction of the light beam emitted by the second light emitting device 430 and the light receiving direction of the fiber optic adapter 500 are in different directions, that is, the emission direction of the second light emitting device 430 is perpendicular to the circuit board 300, and the light receiving direction of the fiber optic adapter 500 is parallel to the circuit board 300, the emission direction of the light beam emitted by the second light emitting device 430 needs to be reflected by the first package 410, so that the emission direction of the reflected light beam and the light receiving direction of the fiber optic adapter 500 are in the same direction. In this way, the light beam emitted by the second light emitting device 430 is incident into the first package 410 through the second incident light port, and the emitted light beam reflected by the first package 410 is coupled into the fiber adapter 500, so as to realize emission of another light.

In some embodiments, the second emission light beam emitted by the second light emitting device 430 is reflected by the first package 410, and the reflected second emission light beam is transmitted along the central axis of the all-in-one optical port, such that the reflected second emission light beam is emitted into the fiber optic adapter 500 through the first package 410.

In some embodiments, an optical element 401 is disposed within the first package 410, the optical element 401 being located at the intersection of the emission light path of the first light emitting device 420 and the emission light path of the second light emitting device 430, i.e., the optical element 401 is located in both the beam emission directions of the first light emitting device 420 and the second light emitting device 430.

The optical element 401 has the functions of transmitting the first emission beam and reflecting the second emission beam, the first emission beam and the reflected second emission beam can be combined by the optical element 401, and the combined beam is coupled to the fiber adapter 500. In this way, the first emission light beam emitted by the first light emitting device 420 can directly pass through the optical element 401, the second emission light beam emitted by the second light emitting device 430 is reflected at the optical element 401, and the reflected second emission light beam has the same emission direction as the first emission light beam, so that the first emission light beam and the reflected second emission light beam are combined at the optical element 401.

The optical element 401 has a transmission surface and a reflection surface, the transmission surface being disposed opposite to the first light emitting device 420 such that the first emission light beam emitted from the first light emitting device 420 is directly transmitted through the optical element 401 via the transmission surface; the reflective surface is disposed opposite to the second light emitting device 430, such that the second emission beam emitted by the second light emitting device 430 is reflected by the reflective surface, the reflected second emission beam is transmitted along the emission direction of the first emission beam, and the reflected second emission beam and the first emission beam are combined at the reflective surface.

In some embodiments, the optical element 401 may be a filter, a prism with a filter or a filter film attached thereto, or other structures as long as the optical element 401 has a function of transmitting the first emission beam and reflecting the second emission beam.

In some embodiments, the optical element 401 is a filter, which has a small size and occupies a small space, thereby facilitating the volume miniaturization design of the optical transceiver module 400.

In some embodiments, by performing simulation and dispersion analysis on the optical path, astigmatism generated by the optical element 401 and astigmatism inherent to the laser in the first light emitting device 420 are offset, so that high coupling efficiency of 60% is achieved, and high utilization rate of the homemade chip is achieved.

In some embodiments, the first emitted light beam may have a wavelength of 1270nm, 1310nm, 1490nm, 1577nm, etc., and correspondingly, the second emitted light beam may have a wavelength of 1270nm, 1310nm, 1490nm, 1577nm, etc.

In some embodiments, the first emission beam has a wavelength of 1577nm and the second emission beam has a wavelength of 1490nm, so that the optical element 401 has functions of transmitting 1577nm and reflecting 1490nm, the first emission beam of 1577nm emitted by the first light emitting device 420 directly transmits through the optical element 401, the second emission beam of 1490nm emitted by the second light emitting device 430 is reflected at the optical element 401, and the reflected second emission beam and the first emission beam are combined and transmitted to the fiber adapter 500.

Since the receiving direction of the first light receiving device 440 for receiving the light beam and the light beam emitting direction of the optical fiber adapter 500 are located in different directions, that is, the receiving direction of the first light receiving device 440 is perpendicular to the circuit board 300, and the light emitting direction of the optical fiber adapter 500 is parallel to the circuit board 300, the light beam received by the optical fiber adapter 500 needs to be reflected by the first package 410, so that the emitting direction of the reflected light beam and the receiving direction of the first light receiving device 440 are located in the same direction. Thus, the external light beam received by the optical fiber adapter 500 is emitted into the first package 410 through the transceiver optical port, and the received light beam reflected by the first package 410 is coupled into the first light receiving device 440, so that one path of light is received.

Since the receiving direction of the second light receiving device 450 for receiving the light beam and the light beam emitting direction of the optical fiber adapter 500 are located in different directions, that is, the receiving direction of the second light receiving device 450 is perpendicular to the circuit board 300, and the light emitting direction of the optical fiber adapter 500 is parallel to the circuit board 300, the light beam received by the optical fiber adapter 500 needs to be reflected by the first package 410, so that the emitting direction of the reflected light beam and the receiving direction of the second light receiving device 450 are located in the same direction. Thus, the external light beam received by the optical fiber adapter 500 is emitted into the first package 410 through the transceiver optical port, and the received light beam reflected by the first package 410 is coupled into the second optical receiving device 450, so that another path of light is received.

In some embodiments, an optical splitting assembly 470 is further disposed in the first package 410, the optical splitting assembly 470 is located in a receiving direction of the external light beam received by the transceiver optical port, the optical splitting assembly 470 is close to the first light receiving device 440 and the second light receiving device 450, and multiple received light beams transmitted by the optical fiber adapter 500 are respectively transmitted to the first light receiving device 440 and the second light receiving device 450 after being demultiplexed by the optical splitting assembly 470.

The optical splitting assembly 470 has a function of reflecting and splitting light, and a first receiving light beam and a second receiving light beam which are emitted into the first package 410 through the transceiver optical port are reflected and split at the optical splitting assembly 470, and the first receiving light beam split by the optical splitting assembly 470 is transmitted to the first light receiving device 440, and the second receiving light beam split by the optical splitting assembly 470 is transmitted to the second light receiving device 450.

Fig. 7 is a schematic structural diagram of a tube shell in an optical module according to an embodiment of the present application, fig. 8 is another angular structural diagram of the tube shell in the optical module according to the embodiment of the present application, fig. 9 is a schematic structural diagram of a third angle of the tube shell in the optical module according to the embodiment of the present application, and fig. 10 is a cross-sectional view of the tube shell in the optical module according to the embodiment of the present application. As shown in fig. 7, 8, 9, and 10, the first housing 410 includes a first side surface 4101, a top surface 4103, a second side surface 4106, and a bottom surface 4108, wherein the first side surface 4101 is disposed opposite to the second side surface 4106, the top surface 4103 is disposed opposite to the bottom surface 4108, and both ends of the top surface 4103 are connected to the first side surface 4101 and the second side surface 4106, respectively.

The first side surface 4101 is provided with a first incident light port 4102, the first incident light port 4102 communicates with the inner cavity of the first housing 410, and the first light emitting device 420 is connected to the first housing 410 through the first side surface 4101, so that the first emitted light beam emitted from the first light emitting device 420 is incident into the first housing 410 through the first incident light port 4102. In some embodiments, the first light emitting device 420 can be fixedly coupled to the first side 4101 via an adjustment sleeve.

In some embodiments, when the first light emitting device 420 is fixedly connected to the first side 4101 of the first package 410 through the adjustment sleeve, laser welding may be performed after the first light emitting device 420 is power coupled to the first package 410 and the fiber optic adapter 500, so as to improve the coupling efficiency of the first light emitting device 420 and the fiber optic adapter 500. .

The top surface 4103 is provided with a second incident light port 4104, the second incident light port 4104 is communicated with the inner cavity of the first package 410, and the second light emitting device 430 is connected with the first package 410 through the second incident light port 4104, so that the second emission light beam emitted from the second light emitting device 430 is incident into the first package 410 through the second incident light port 4104. In some embodiments, the second light emitting device 430 may be inserted into the second incident light port 4104, and the outer wall of the second light emitting device 430 is adhesively fixed to the inner wall of the second incident light port 4104.

The top surface 4103 is further provided with a first light exit port 4105, the first light exit port 4105 is communicated with the inner cavity of the first package 410, and the first light receiving device 440 is connected with the first package 410 through the first light exit port 4105, so that the first received light beam received by the first package 410 is emitted into the first light receiving device 440 through the first light exit port 4105.

The second side 4106 is provided with a light port 4107 for integrated transmission and reception, the light port 4107 for integrated transmission and reception is communicated with the inner cavity of the first package 410, the optical fiber adapter 500 is connected with the first package 410 through the light port 4107 for integrated transmission and reception, and thus the received light beam transmitted by the optical fiber adapter 500 is emitted into the first package 410 through the light port 4107 for integrated transmission and reception. In some embodiments, the fiber optic adapter 500 is inserted into the first housing 410 through the transceiver optical port 4107 to achieve a secure connection of the fiber optic adapter 500 to the first housing 410.

A second light exit port 4109 is provided on the bottom surface 4108, the second light exit port 4109 is communicated with the inner cavity of the first package 410, and the second light receiving device 450 is connected with the first package 410 through the bottom surface 4108, so that the second received light beam received by the first package 410 is emitted into the second light receiving device 450 through the second light exit port 4109. In some embodiments, the second light receiving device 450 may be inserted into the second exit light port 4109, and the outer wall of the second light receiving device 450 is adhesively fixed to the inner wall of the second exit light port 4109.

The inner cavity of the first housing 410 includes a first inner cavity 4110, a second inner cavity 4113, and a third inner cavity 4114, the first inner cavity 4110 communicates with the third inner cavity 4114 through the second inner cavity 4113, the first inner cavity 4110 communicates with the first incident light port 4102 and the second incident light port 4104, and the optical element 401 is located in the first inner cavity 4110; the third inner cavity 4114 is communicated with the first light exit port 4105, the second light exit port 4109, and the integrated light receiving and transmitting port 4107, and the light splitting component 470 is located in the third inner cavity 4114.

Be provided with the support platform 4111 in the first inner chamber 4110, this support platform 4111 sets up in the slope, by first incident light mouth 4102 to second inner chamber 4113 direction, the support platform 4111 sets up in the slope from top to bottom, along the emission direction of first emitted light beam promptly, and the distance between support platform 4111 and the second incident light mouth 4104 increases gradually for form first angle between support platform 4111 and the emission optical axis. In some embodiments, the first angle is 45 degrees.

The transmission surface of the optical element 401 is adhered to the supporting platform 4111, such that a first angle exists between the optical element 401 and the emission optical axis, the second emission beam emitted by the second light emitting device 430 is reflected by the reflection surface of the optical element 401, and the emission direction of the reflected second emission beam is the same as that of the first emission beam.

In some embodiments, to facilitate the first light beam emitted by the first light emitting device 420 to pass through the optical element 401, the supporting platform 4111 is provided with a light hole, and the light hole is communicated with the first inner cavity 4110. In this way, the first light emitting device 420 emits the first light beam to the optical element 401 through the first inner cavity 4110 and the light hole, and the first light beam directly transmits through the optical element 401.

In some embodiments, the light hole on the supporting platform 4111 may be an opening directly or a platform region made of a light transmissive material, as long as the first emitted light beam emitted by the first light emitting device 420 can pass through the optical element 401 through the light hole.

In some embodiments, when the first emitted light beam is transmitted through the optical element 401, most (about 95%) of the first emitted light beam is directly transmitted through the optical element 401, but still a part (about 5%) of the first emitted light beam may be reflected at the transmission surface of the optical element 401, and the reflected first emitted light beam may be reflected again at the inner wall of the first inner cavity 4110, and the reflected first emitted light beam may enter the second light emitting device 430 through the second incident light port 4104, causing crosstalk of the reflected light to the second emitted light beam.

In order to avoid crosstalk of the reflected first emission beam to the second emission beam, an inclined surface 4112 is disposed on an inner wall of the first inner cavity 4110, the inclined surface 4112 is located below the supporting platform 4111, and a distance between the inclined surface 4112 and the second light incident port 4104 is gradually decreased along an emission direction of the first emission beam. In this way, after a part of the first emitted light beam is reflected by the transmission surface of the optical element 401, the reflected first emitted light beam is reflected again by the inclined surface 4112, and the inclined surface 4112 is arranged obliquely, so that the first emitted light beam after being reflected again diverges outward, the first emitted light beam after being reflected again can be prevented from entering the second incident light port 4104, and crosstalk of the reflected light to the second emitted light beam can be effectively reduced.

In order to reduce the incidence of the light beam reflected by the inclined surface 4112 of the first emitted light beam into the second incident light port 4104, the inclined surface 4112 forms a second angle with the emission optical axis. In some embodiments, the second angle is 20 ° to 50 °.

In some embodiments, the first emitted light beam emitted by the first light emitting device 420 is transmitted to the fiber optic adapter 500 through the optical element 401, and due to the change of media and the reflection of light propagating at the interface between different media, when the first emitted light beam passes through the second inner cavity 4113 and the third inner cavity 4114 and is transmitted to the fiber end surface in the fiber optic adapter 500, most of the first emitted light beam is directly transmitted into the fiber optic adapter 500 through the fiber end surface, a small portion of the first emitted light beam is reflected at the fiber end surface, and the reflected first emitted light beam may return to the first light emitting device 420 along the original path, thereby affecting the emission performance of the first light emitting device 420.

In order to prevent the reflected first emitted light beam from returning to the first light emitting device 420 along the original path, an isolator may be disposed in the second inner cavity 4113, the first emitted light beam transmitted through the optical element 401 directly passes through the isolator and enters the fiber optic adapter 500, and the isolator may isolate the first emitted light beam reflected by the fiber end surface of the fiber optic adapter 500, so as to prevent the reflected first emitted light beam from returning to the first light emitting device 420, thereby ensuring the emission performance of the first light emitting device 420.

In some embodiments, the first light emitting device 420 emits the first emitting light beam as a converging light through the coupling lens at the light emitting end of the first light emitting device 420, and the light spot of the converging light at the focal point is the smallest, so that the isolator can be disposed at the focal point of the first emitting light beam, and the size of the isolator is the smallest, thereby ensuring that the aperture of the second inner cavity 4113 required by the isolator is the smallest, which is beneficial to the miniaturization design of the first package 410.

The beam splitting assembly 470 arranged in the third inner cavity 4114 comprises a support frame 4710 and a plurality of beam splitters, the beam splitters are fixed on the support frame 4710, the support frame 4710 is fixed in the third inner cavity 4114, and the plurality of beam splitters are fixed in the third inner cavity 4114 through the support frame 4710.

Fig. 11 is a schematic structural diagram of a support frame in an optical module according to an embodiment of the present disclosure, fig. 12 is another schematic angular structural diagram of the support frame in the optical module according to the embodiment of the present disclosure, and fig. 13 is a cross-sectional view of the support frame in the optical module according to the embodiment of the present disclosure. As shown in fig. 11, 12, and 13, the support frame 4710 includes a first connection portion 4704, a support portion, and a second connection portion 4705, the first connection portion 4704 is connected to the second connection portion 4705 by the support portion, the first connection portion 4704 faces away from the optical fiber adapter 500, and the second connection portion 4705 is fixedly connected to the optical fiber adapter 500.

A light passage hole 4706 passing through the first connecting portion 4704, the supporting portion, and the second connecting portion 4705 is provided in the supporting frame 4710, and a first emission light beam transmitted through the optical element 401 and a second emission light beam reflected by the optical element 401 pass through the light passage hole 4706 of the supporting frame 4710 and enter the optical fiber adapter 500.

The supporting portion is provided with a first supporting surface 4701, a first limiting surface 4709, a second supporting surface 4702, a second limiting surface 4703 and a third supporting surface 4707, and the first supporting surface 4701 is arranged obliquely, that is, the distance between the first supporting surface 4701 and the first connecting portion 4704 gradually increases along the emission direction (from left to right) of the first emission light beam. The first stopper surface 4709 is positioned at the lower left of the first support surface 4701, the end surface of the beam splitter abuts against the first stopper surface 4709, and the side surface of the beam splitter is adhered to the first support surface 4701, whereby a beam splitter is fixed to the support portion by the first support surface 4701 and the first stopper surface 4709.

The second supporting surface 4702 is disposed obliquely, that is, the distance between the second supporting surface 4702 and the second connecting portion 4705 is gradually reduced along the emission direction (from left to right) of the first emitted light beam. Second stopper surface 4703 is positioned at the lower right of second support surface 4702, the end surface of another optical splitter abuts against second stopper surface 4703, the side surface of this optical splitter is adhered to second support surface 4702, the other end surface of the optical splitter abuts against the top surface of first connection portion 4704, and thus the other optical splitter is fixed to the support portion by second support surface 4702, second stopper surface 4703, and the top surface of first connection portion 4704.

In some embodiments, the light passing holes in the support pass through the first support surface 4701 and the second support surface 4702, and the beam splitter fixed to the second support surface 4702 is positioned above the beam splitter fixed to the first support surface 4701.

The side of the support portion facing the second exit light port 4109 is provided with a third support surface 4707, and the third support surface 4707 is disposed obliquely, that is, the distance between the third support surface 4707 and the second exit light port 4109 is gradually reduced along the emission direction of the first emission light beam. The side surface of the third spectroscope is stuck to the third support surface 4707, whereby the third spectroscope is fixed to the support portion by the third support surface 4707.

In some embodiments, a through hole 4708 is disposed on the third supporting surface 4707, the through hole 4708 is communicated with a light through hole in the supporting portion, a plurality of received light beams transmitted by the fiber adapter 500 are reflected by a first beam splitter on the first supporting surface 4701, the reflected received light beams are incident on a second beam splitter on the third supporting surface 4707, the second beam splitter splits the plurality of received light beams, one received light beam is incident on the second light receiving device 450 through the second beam splitter, the other received light beam is reflected again by the second beam splitter, and the reflected received light beam is directly incident on the third beam splitter on the second supporting surface 4702, and the received light beam transmitted through the third beam splitter is incident on the first light receiving device 440.

Fig. 14 is an assembled cross-sectional view of an optical splitter module and a fiber adapter in an optical module according to an embodiment of the present application. As shown in fig. 14, the optical fiber adapter 500 comprises a connection sleeve 520, an inner optical fiber 530, an outer sleeve 540 and an inner sleeve 550, wherein the connection sleeve 520 is fixedly connected with the outer sleeve 540, the inner sleeve 550 is fixed on the side wall of the inner cavity of the outer sleeve 540, and the inner optical fiber 530 is fixed in the inner cavity of the outer sleeve 540 through the inner sleeve 550. The connecting sleeve 520 is provided with a mounting hole which is communicated with the inner cavity of the outer sleeve 540, a converging lens 510 is arranged in the mounting hole, the converging lens 510 protrudes out of the connecting sleeve 520, and the converging lens 510 is inserted into the light through hole of the second connecting portion 4705. In this manner, the first received light beam and the second received light beam transmitted by the inner optical fiber 530 in the optical fiber adapter 500 are converted into collimated light beams by the converging lens 510, and the collimated light beams are incident into the supporting frame 4710 through the light passing hole in the second connecting portion 4705.

In some embodiments, a collimating lens 4115 is disposed in the light-passing hole of the first connecting portion 4704, the collimating lens 4115 is used for converting the first emitted light beam transmitted through the optical element 401 and the second emitted light beam reflected at the optical element 401 into collimated light beams, the collimated light beams are directly transmitted through the beam splitter on the first supporting surface 4701 and enter the converging lens 510, the collimated light beams are converted into converging light beams by the converging lens 510, and the converging light beams are converged into the inner optical fiber 530.

The optical splitter assembly 470 comprises a first optical splitter 4116, a second optical splitter 4118, and a third optical splitter 4117, wherein the first optical splitter 4116 faces the fiber optic adapter 500 for reflecting the multiple received beams from the fiber optic adapter 500; the second beam splitter 4118 faces the second light receiving device 450, and is configured to split the multiple reflected received light beams from the first beam splitter 4116, where one received light beam directly penetrates through the second beam splitter 4118 and enters the second light receiving device 450, and the other received light beam is reflected again at the second beam splitter 4118; the third beam splitter 4117 faces the first light receiving device 440, and transmits the re-reflected received light beam from the second beam splitter 4118, and the transmitted received light beam is incident into the first light receiving device 440.

Fig. 15 is a schematic view of a receiving optical path of an optical module according to an embodiment of the present application. As shown in fig. 15, a lower end surface of the first beam splitter 4116 abuts against the first position-limiting surface 4709, a side surface of the first beam splitter 4116 is adhered to the first supporting surface 4701, and a third angle α is formed between the first beam splitter 4116 and the emission optical axis. The first beam splitter 4116 has a function of reflecting the first received light beam and the second received light beam, and is used for reflecting the first received light beam and the second received light beam transmitted by the optical fiber adapter 500. In some embodiments, the third angle α is 40 ° to 50 °.

In some embodiments, the portion of the first beam splitter 4116 exposed by the light passing hole is provided with a reflecting surface a, and when the first and second received light beams transmitted by the fiber optic adapter 500 are incident on the reflecting surface a of the first beam splitter 4116, the first and second received light beams are reflected at the reflecting surface a of the first beam splitter 4116.

The side surface of the second beam splitter 4118 is adhered to the third supporting surface 4707 and located outside the supporting frame 4710, and a fourth angle β is formed between the second beam splitter 4118 and the emission optical axis. The second beam splitter 4118 has functions of reflecting the first received light beam and transmitting the second received light beam, and is configured to transmit and reflect the first received light beam and the second received light beam reflected by the first beam splitter 4116. In some embodiments, the fourth angle β is between 6 ° and 20 °.

In some embodiments, a transmission surface is disposed on an upper surface of the second beam splitter 4118 exposed through the through hole 4708, a transmission reflection surface b is disposed on a lower surface of the second beam splitter 4118 located outside the support 4710, the first received light beam and the second received light beam reflected by the first beam splitter 4116 are incident on the second beam splitter 4118, and the reflected first received light beam is transmitted to the transmission reflection surface b of the lower surface through the transmission surface of the upper surface and is reflected again on the transmission reflection surface b; the reflected second received light beam sequentially passes through the transmission surface on the upper surface and the transmission reflection surface b on the lower surface, and the second received light beam passing through the second beam splitter 4118 enters the second light receiving device 450 through the second light exit 4109.

If a transmitting and reflecting surface is disposed on the upper surface of the second beam splitter 4118, the lower surface of the second beam splitter 4118 needs to be adhered to the third supporting surface 4707, and the second beam splitter 4118 needs to be disposed in the through hole 4708, which increases the size of the supporting frame 4710. However, when the lower surface of the second beam splitter 4118 is provided with a transmissive and reflective surface, the second beam splitter 4118 can be attached to the outer side of the support frame 4710, and only a through hole 4708 is required to be provided to conveniently receive the light beam to the second beam splitter 4118, so that the size of the support frame 4710 can be effectively reduced, which is beneficial to the miniaturization design of the first tube housing 410.

The right end face of the third beam splitter 4117 abuts against the second limiting face 4703, the left end face abuts against the top face of the first connecting portion 4704, the lower side face is adhered to the second supporting face 4702, and a fifth angle gamma is formed between the third beam splitter 4117 and the emission optical axis. The third beam splitter 4117 has a function of transmitting the first received light beam, and is used for transmitting the first received light beam reflected by the second beam splitter 4118. In some embodiments, the fifth angle γ is between 10 ° and 22 °.

In some embodiments, the lower surface of the third beam splitter 4117 is provided with a transmission surface c, the first received light beam reflected by the second beam splitter 4118 directly transmits through the third beam splitter 4117, and the first received light beam transmitted through the third beam splitter 4117 enters the first light receiving device 440 through the first exit port 4105.

In some embodiments, a third angle α between the first beam splitter 4116 and the emission axis within the first tube shell 410 is 45 °, a fourth angle β between the second beam splitter 4118 and the emission axis is 8 °, and a fifth angle γ between the third beam splitter 4117 and the emission axis is 16 °. Thus, the first received light beam and the second received light beam transmitted by the optical fiber adapter 500 are reflected to the second beam splitter 4118 by the first beam splitter 4116, the reflected second received light beam directly transmits through the second beam splitter 4118, the reflected first received light beam is reflected again at the second beam splitter 4118, and the reflected first received light beam directly transmits through the third beam splitter 4117.

In some embodiments, the first beam splitter 4116, the second beam splitter 4118, and the third beam splitter 4117 may be filters, prisms with filters or filter films attached thereto, or other structures, which are not limited herein.

In some embodiments, the first beam splitter 4116, the second beam splitter 4118, and the third beam splitter 4117 are filters, and the filters have a small size and occupy a small space, which is beneficial for the miniaturization design of the first package 410.

The wavelength of the first received light beam may be 1270nm, 1310nm, 1490nm, 1577nm, or the like, and is not particularly limited herein; accordingly, the wavelength of the second received light beam may be 1270nm, 1310nm, 1490nm, 1577nm, etc., and is not particularly limited herein.

In some embodiments, the first received light beam has a wavelength of 1270nm and the second received light beam has a wavelength of 1310nm, such that the first beam splitter 4116 has the function of reflecting wavelengths of 1270nm and 1310nm, the second beam splitter 4118 has the function of transmitting wavelengths of 1310nm and reflecting wavelengths of 1270nm, and the second beam splitter 4118 has the function of isolating wavelengths of 1490nm, 1577nm and the like; the third beam splitter 4117 has the function of transmitting a wavelength of 1270 nm.

In some embodiments, the receiving optical axis of the second light receiving device 450 is perpendicular to the circuit board 300, and if the receiving optical axis of the first light receiving device 440 is also perpendicular to the circuit board 300, a fourth optical splitter is further disposed, and the fourth optical splitter is configured to reflect the reflected receiving light beam from the second optical splitter 4118 again, and the receiving light beam reflected by the fourth optical splitter is transmitted to the third optical splitter 4117. When the four optical splitters are used for splitting the two paths of received light beams, the occupied space is large, and the miniaturization design of the first tube shell 410 is not utilized.

In order to facilitate miniaturization of the first package 410, the receiving optical axis of the first light receiving device 440 may be tilted, and the third beam splitter 4117 is also tilted by a predetermined angle, so that the receiving light beam reflected by the second beam splitter 4118 can directly pass through the third beam splitter 4117 and enter the tilted first light receiving device 440.

Fig. 16 is a schematic structural diagram of a bracket in an optical module provided in the embodiment of the present application, and fig. 17 is another schematic angular structural diagram of the bracket in the optical module provided in the embodiment of the present application. As shown in fig. 16 and 17, in order to obliquely dispose the first light receiving device 440, a holder 460 is disposed at the first exit light port 4105, the holder 460 includes a mounting groove and an insertion surface 4603, the insertion surface 4603 is inserted into the first exit light port 4105, and the insertion surface 4603 is fixedly connected to an inner sidewall of the first exit light port 4105 to fix the holder 460 at the first exit light port 4105.

The mounting groove includes a mounting surface 4601, and an end of the mounting groove facing away from the insertion surface 4603 is provided with an opening that is disposed opposite the mounting surface 4601. The mounting surface 4601 is obliquely arranged such that the distance between the mounting surface 4601 and the central axis of the first tube housing 410 in the light emission direction gradually decreases, i.e., the direction of inclination of the mounting surface 4601 is the same as the direction of inclination of the third beam splitter 4117.

In some embodiments, the mounting surface 4601 forms a fifth angle γ with the emission axis in the first tube housing 410, i.e., the angle between the mounting surface 4601 and the emission axis is the same as the angle between the third beam splitter 4117 and the emission axis, and the mounting surface 4601 is disposed parallel to the third beam splitter 4117.

The mounting surface 4601 is provided with a light transmission hole 4602, and the light transmission hole 4602 penetrates the mounting surface 4601 and the insertion surface 4603, so that the light transmission hole 4602 is provided corresponding to the first exit light port 4105, and the first received light beam transmitted through the third beam splitter 4117 passes through the first exit light port 4105 and enters the light transmission hole 4602.

The first light receiving device 440 is inserted into the mounting groove, and the outer sidewall of the first light receiving device 440 is fixedly connected to the sidewall of the mounting groove and the mounting surface 4601, so that the first light receiving device 440 is obliquely disposed on the first package 410 through the bracket 460, and the first received light beam transmitted through the third beam splitter 4117 sequentially passes through the first light exit 4105 and the light transmission hole 4602 and enters the first light receiving device 440.

Fig. 18 is a schematic structural diagram of an optical transceiver in an optical module according to an embodiment of the present disclosure. As shown in fig. 18, a collimating lens 4115 is mounted in the light through hole of the first connecting portion 4704 in the supporting frame 4710, then the first beam splitter 4116 is mounted on the first supporting surface 4701, the second beam splitter 4118 is mounted on the third supporting surface 4707, the third beam splitter 4117 is mounted on the second limiting surface 4703 and the second supporting surface 4702, the assembly of the beam splitting assembly 470 is completed, and the assembled beam splitting assembly 470 is mounted in the third inner cavity 4114 of the first tube housing 410; then, the optical fiber adapter 500 provided with the collecting lens 510 is inserted into the third inner cavity 4114 through the light receiving and transmitting port 4107, and the collecting lens 510 is inserted into the light passing hole of the second connecting portion 4705 of the supporting frame 4710, so that the supporting frame 4710, the optical fiber adapter 500 and the first tube housing 410 are fixedly connected; then, the optical element 401 is mounted on the supporting platform 4111 of the first inner cavity 4110, so that the central axes of the optical element 401, the collimating lens 4115, the first optical splitter 4116 and the converging lens 510 are located on the same straight line; the isolator 600 is then installed in the second interior cavity 4113 to complete the assembly of the optical element 401, the isolator 600, and the optical splitter assembly 470 in the first housing 410.

After the first package 410, the optical element 401, the isolator 600 and the light splitting assembly 470 are assembled, the first light emitting device 420 is laser welded to the first side 4101 of the first package 410 through the adjustment sleeve such that the first emitted light beam emitted by the first light emitting device 420 is incident into the first interior cavity 4110 through the first incident light port 4102 on the first side 4101; then the second light emitting device 430 is inserted into the first package 410 through the second incident light port 4104, and the second light receiving device 450 is inserted into the first package 410 through the second exit light port 4109; the holder 460 is then inserted into the first package 410 through the first light exit port 4105, and the first light receiving device 440 is fixed in the mounting groove of the holder 460 to complete the assembly of the optical transceiver module 400.

After the optical transceiver module 400 is assembled, the first light emitting device 420 emits the first light beam sequentially through the optical element 401 and the isolator 600, the first light beam passing through the isolator 600 is converted into a parallel light beam by the collimating lens 4115, the parallel light passes through the first beam splitter 4116, and is emitted into the inner fiber 530 of the fiber optic adapter 500 through the converging lens 510, so that the first light beam is emitted.

The second emission light beam emitted by the second light emitting device 430 is reflected by the optical element 401, the reflected second emission light beam transmits through the isolator 600, the second emission light beam transmitted through the isolator 600 is converted into a parallel light beam by the collimating lens 4115, the parallel light beam transmits through the first beam splitter 4116 and is emitted into the inner fiber 530 of the fiber optic adapter 500 by the converging lens 510, and the emission of the second emission light beam is realized.

In some embodiments, the first emission beam and the second emission beam may be combined at the optical element 401, that is, the second emission beam is reflected at the optical element 401, the reflected second emission beam is combined with the first emission beam transmitted through the optical element 401, the combined light is transmitted through the isolator 600, the combined light transmitted through the isolator 600 is converted into a parallel beam by the collimating lens 4115, and the parallel beam is transmitted through the first beam splitter 4116 and is emitted into the internal optical fiber 530 of the optical fiber adapter 500 through the converging lens 510, so that the emission of the first emission beam and the second emission beam is realized.

The first receiving light beam and the second receiving light beam transmitted by the optical fiber adapter 500 are converted into a first receiving parallel light and a second receiving parallel light through the converging lens 510, the first receiving parallel light and the second receiving parallel light are reflected to the second beam splitter 4118 through the first beam splitter 4116, and the reflected second receiving parallel light directly penetrates through the second beam splitter 4118 and is incident into the second light receiving device 450, so that the second receiving light beam is received.

The reflected first received parallel light is reflected again at the second beam splitter 4118, and the reflected first received parallel light directly penetrates through the third beam splitter 4117 to enter the first light receiving device 440, so that the first received light beam is received.

In some embodiments, the first receiving light beam and the second receiving light beam transmitted by the fiber adapter 500 may be separate lights with different wavelengths, or may be a combined light including the first receiving light beam and the second receiving light beam.

In some embodiments, the first received light beam transmitted by the fiber optic adapter 500 is 1270 ± 10nm wavelength received light and the second received light beam is 1310 ± 20nm wavelength received light, i.e., the first received light beam may be 1280nm wavelength received light and the second received light beam may be 1290nm wavelength received light, such that the first received light beam is separated from the second received light beam by a small distance. And the beam splitting effect of first beam splitter 4116, second beam splitter 4118 and third beam splitter 4117 provided by the present application can separate the first received light beam and the second received light beam with small wavelength distance, so that the dense wavelength splitting function is realized.

In this application, the optical path system of 3 lenses (the coupling lens 4210 in the first light emitting device 420, the collimating lens 4115 in the first package 410, and the converging lens 510 in the optical fiber adapter 500) and the optical path design of converting the converged light into the parallel light are adopted, so that the coupling efficiency of the optical transceiver module 400 is improved. The innovative light splitting design can realize the dense wave splitting function within 6nm, and compared with other schemes in the industry, the light splitting design can better meet the wave splitting requirement required by the protocol of a Com-PON product under the condition of lower cost. The special light path design can realize two-way transmission and two-way reception by using the best optical filter and the minimum insertion loss.

In the optical module provided in the embodiment of the present application, a collimating lens 4115 in the first tube housing 410 and a converging lens 510 in the optical fiber adapter 500 adopt passive coupling, the collimating lens 4115 is directly assembled in a light through hole of the first connecting portion 4704, the converging lens 510 is directly assembled in a mounting hole of the connecting sleeve 520, and the converging lens 510 is inserted into a light through hole of the second connecting portion 4705, in order to improve the coupling between the transmitting light path and the receiving light path in the first tube housing 410 and the optical fiber adapter 500, the mounting accuracy requirement of the collimating lens 4115 and the converging lens 510 is high.

The above-described assembly method has a high requirement on the position of each structure in the first case 410, which affects the processing efficiency of the first case 410. Therefore, the coupling of the straight lens 4115 and the converging lens 510 can be improved to reduce the position requirements for assembling the structures in the first housing 410.

Example two

Fig. 19 is a schematic structural diagram of another optical transceiver module in the optical module according to the embodiment of the present application, and fig. 20 is an exploded schematic diagram of another optical transceiver module in the optical module according to the embodiment of the present application. As shown in fig. 19 and 20, the optical transceiver module 400 provided in this embodiment of the present application may include a second package 402, an optical transmitter and an optical receiver, where the second package 402 includes an incident optical port, a transceiver optical port and a receiving optical port, the optical transmitter is connected to the second package 402 through the incident optical port, the optical receiver is connected to the second package 402 through the receiving optical port, and the optical fiber adapter 500 is connected to the second package 402 through the transceiver optical port. Thus, the light beam emitted by the light emitting device is emitted into the second package 402 through the incident light port, and the emitted light beam is coupled to the optical fiber adapter 500 through the second package 402 via the transceiver light port, so that light emission is realized; the receiving light beam transmitted by the optical fiber adapter 500 enters the second package 402 through the transceiver optical port, and then is transmitted to the light receiving device through the receiving optical port via the second package 402, so as to implement light reception.

In some embodiments, the optical transceiver module 400 may include only one light emitting device and one light receiving device, the second package 402 may include only one incident light port, one transceiver integrated light port and one receiving light port, one light emitting device is connected to the second package 402 through the incident light port, one light receiving device is connected to the second package 402 through the receiving light port, and the optical fiber adapter 500 is connected to the second package 402 through the transceiver integrated light port, so that one light emitting and one light receiving of the optical transceiver module 400 can be realized.

In some embodiments, the optical transceiver module 400 may further include two light emitting devices and two light receiving devices, the second package 402 includes two incident light ports, two receiving light ports, and one transceiver integrated light port, that is, the optical transceiver module 400 includes a first light emitting device 420, a second light emitting device 430, a first light receiving device 440, and a second light receiving device 450, the second package 402 includes a first incident light port, a second incident light port, a first receiving light port, and a transceiver integrated light port, the first light emitting device 420 is connected to the second package 402 through the first incident light port, the second light emitting device 430 is connected to the second package 402 through the second incident light port, the first light receiving device 440 is connected to the second package 402 through the first receiving light port, the second light receiving device 450 is connected to the second package 402 through the second receiving light port, and the optical fiber adapter 500 is connected to the second package 402 through the transceiver integrated light port.

The first incident light port is located on the left side of the second tube shell 402, the second incident light port is located on the upper side of the second tube shell 402, the first receiving light port is located on the upper side of the second tube shell 402, the second receiving light port is located on the lower side of the second tube shell 402, and the transceiver integrated light port is located on the right side of the second tube shell 402. That is, the first incident light port and the transceiver integrated light port are disposed opposite to each other, the second incident light port and the first receiving light port are disposed on the same side of the second housing 402, and the first receiving light port and the second receiving light port are disposed opposite to each other.

Since the emitting direction of the light beam emitted by the first light emitting device 420 and the light beam receiving direction of the optical fiber adapter 500 are located in the same direction, that is, the emitting direction of the first light emitting device 420 is parallel to the circuit board 300, and the light receiving direction of the optical fiber adapter 500 is also parallel to the circuit board 300, in this way, the light beam emitted by the first light emitting device 420 is emitted into the second package 402 through the first incident light port, and the emitted light beam is directly coupled into the optical fiber adapter 500 through the second package 402, thereby realizing the emission of one path of light.

In some embodiments, the light-emitting end of the first light emitting device 420 is provided with a coupling lens, and the laser beam emitted by the laser in the first light emitting device 420 is converted into a converging beam through the coupling lens, and the converging beam is emitted into the second package 402 through the first incident light port.

In some embodiments, the first light emitting device 420 emits the first light beam along the central axis of the all-in-one light port such that the first light beam is transmitted through the second housing 402 and into the fiber optic adapter 500. The central axis of the integrated optical transceiver port is an axis passing through the center of the integrated optical transceiver port and perpendicular to the plane of the integrated optical transceiver port.

Since the emission direction of the light beam emitted by the second light emitting device 430 and the light receiving direction of the fiber optic adapter 500 are in different directions, that is, the emission direction of the second light emitting device 430 is perpendicular to the circuit board 300, and the light receiving direction of the fiber optic adapter 500 is parallel to the circuit board 300, the emission direction of the light beam emitted by the second light emitting device 430 needs to be reflected by the second package housing 402, so that the emission direction of the reflected light beam and the light receiving direction of the fiber optic adapter 500 are in the same direction. In this way, the light beam emitted by the second light emitting device 430 is incident into the second package 402 through the second incident light port, and the emitted light beam reflected by the second package 402 is coupled into the fiber adapter 500, so as to realize emission of another light.

In some embodiments, the second emission beam emitted by the second light emitting device 430 is reflected by the second package 402, and the reflected second emission beam is transmitted along the central axis of the all-in-one optical port, such that the reflected second emission beam passes through the second package 402 and is emitted into the fiber optic adapter 500.

In some embodiments, an optical element 401 is disposed within the second package 402, the optical element 401 being located at the intersection of the emission light path of the first light emitting device 420 and the emission light path of the second light emitting device 430, i.e., the optical element 401 is located in both the beam emission directions of the first light emitting device 420 and the second light emitting device 430.

The optical element 401 has the functions of transmitting the first emission beam and reflecting the second emission beam, the first emission beam and the reflected second emission beam can be combined by the optical element 401, and the combined beam is coupled to the fiber adapter 500. In this way, the first emission light beam emitted by the first light emitting device 420 can directly pass through the optical element 401, the second emission light beam emitted by the second light emitting device 430 is reflected at the optical element 401, and the reflected second emission light beam has the same emission direction as the first emission light beam, so that the first emission light beam and the reflected second emission light beam are combined at the optical element 401.

The optical element 401 has a transmission surface and a reflection surface, the transmission surface being disposed opposite to the first light emitting device 420 such that the first emission light beam emitted from the first light emitting device 420 is directly transmitted through the optical element 401 via the transmission surface; the reflective surface is disposed opposite to the second light emitting device 430, such that the second emission beam emitted by the second light emitting device 430 is reflected by the reflective surface, the reflected second emission beam is transmitted along the emission direction of the first emission beam, and the reflected second emission beam and the first emission beam are combined at the reflective surface.

In some embodiments, the optical element 401 may be a filter, a prism with a filter or a filter film attached thereto, or other structures as long as the optical element 401 has a function of transmitting the first emission beam and reflecting the second emission beam.

In some embodiments, the optical element 401 is a filter, which has a small size and occupies a small space, thereby facilitating the volume miniaturization design of the optical transceiver module 400.

In some embodiments, the first emitted light beam may have a wavelength of 1270nm, 1310nm, 1490nm, 1577nm, etc., and correspondingly, the second emitted light beam may have a wavelength of 1270nm, 1310nm, 1490nm, 1577nm, etc.

In some embodiments, the first emission beam has a wavelength of 1577nm and the second emission beam has a wavelength of 1490nm, so that the optical element 401 has functions of transmitting 1577nm and reflecting 1490nm, the first emission beam of 1577nm emitted by the first light emitting device 420 directly transmits through the optical element 401, the second emission beam of 1490nm emitted by the second light emitting device 430 is reflected at the optical element 401, and the reflected second emission beam and the first emission beam are combined and transmitted to the fiber adapter 500.

Since the receiving direction of the first light receiving device 440 for receiving the light beam and the light beam emitting direction of the optical fiber adapter 500 are located in different directions, that is, the receiving direction of the first light receiving device 440 is perpendicular to the circuit board 300, and the light emitting direction of the optical fiber adapter 500 is parallel to the circuit board 300, the light beam received by the optical fiber adapter 500 needs to be reflected by the second package 402, so that the emitting direction of the reflected light beam and the receiving direction of the first light receiving device 440 are located in the same direction. Thus, the external light beam received by the optical fiber adapter 500 is emitted into the second package 402 through the transceiver optical port, and the received light beam reflected by the second package 402 is coupled into the first light receiving device 440, so that one path of light is received.

Since the receiving direction of the light beam received by the second light receiving device 450 is different from the light beam emitting direction of the optical fiber adapter 500, that is, the receiving direction of the second light receiving device 450 is perpendicular to the circuit board 300, and the light emitting direction of the optical fiber adapter 500 is parallel to the circuit board 300, the light beam received by the optical fiber adapter 500 needs to be reflected by the second package 402, so that the emitting direction of the reflected light beam and the receiving direction of the second light receiving device 450 are in the same direction. Thus, the external light beam received by the optical fiber adapter 500 is emitted into the second package 402 through the transceiver optical port, and the received light beam reflected by the second package 402 is coupled into the second light receiving device 450, so that another path of light is received.

A fourth optical splitter 405, a fifth optical splitter 407, and a sixth optical splitter 408 are disposed in the second tube housing 402, where the fourth optical splitter 405 is located in a receiving direction of the transmission and reception light beam of the optical fiber adapter 500, and is used to reflect the first reception light beam and the second reception light beam transmitted by the optical fiber adapter 500; the fifth optical splitter 407 is disposed corresponding to the second light receiving device 450, and configured to transmit the reflected second received light beam, reflect the reflected first received light beam again, and emit the transmitted second received light beam into the second light receiving device 450; the sixth beam splitter 408 is disposed corresponding to the first light receiving device 440, and is configured to transmit the first received light beam reflected by the fifth beam splitter 407, and the transmitted first received light beam is incident into the first light receiving device 440.

Fig. 21 is a schematic structural diagram of another tube shell in the optical module provided in the embodiment of the present application, fig. 22 is a schematic structural diagram of another angle of another tube shell in the optical module provided in the embodiment of the present application, and fig. 23 is a cross-sectional view of another tube shell in the optical module provided in the embodiment of the present application. As shown in fig. 21, 22 and 23, the second case 402 includes a first surface 4021, a second surface 4023, a third surface 4027 and a fourth surface 4029, the first surface 4021 is disposed opposite to the third surface 4027, the second surface 4023 is disposed opposite to the fourth surface 4029, and both ends of the second surface 4023 are connected to the first surface 4021 and the third surface 4027, respectively.

The first surface 4021 is provided with a first light inlet 4022, the first light inlet 4022 is communicated with the inner cavity of the second tube housing 402, and the first light emitting device 420 is connected to the second tube housing 402 through the first surface 4021, so that the first emitting light beam emitted by the first light emitting device 420 is emitted into the second tube housing 402 through the first light inlet 4022. In some embodiments, the first light emitting device 420 may be fixedly attached to the first surface 4021 by an adjustment sleeve 480.

The second surface 4023 has a second light inlet 4024, the second light inlet 4024 is connected to the inner cavity of the second package 402, and the second light emitting device 430 is connected to the second package 402 through the second light inlet 4024, such that the second emission light beam emitted by the second light emitting device 430 enters the second package 402 through the second light inlet 4024.

The second surface 4023 is further provided with a first light outlet 4025, the first light outlet 4025 is communicated with the inner cavity of the second tube housing 402, and the first light receiving device 440 is connected to the second tube housing 402 through the first light outlet 4025, so that the first receiving light beam received by the second tube housing 402 is emitted into the first light receiving device 440 through the first light outlet 4025.

In some embodiments, a protruding fixing stand 4026 may be provided on the second surface 4023, an inclined mounting hole is provided in the fixing stand 4026, the mounting groove communicates with the inner cavity of the second package 402, and the first light receiving device 440 is inserted into the mounting groove so that the first light receiving device 440 is obliquely fixed on the second package 402.

In some embodiments, the fixing stand 4026 is integrated with the second housing 402, and the mounting hole in the fixing stand 4026 is the first light outlet 4025 on the second housing 402.

A transceiving optical port 4028 is formed in the third surface 4027, the transceiving optical port 4028 is communicated with the inner cavity of the second package 402, and the optical fiber adapter 500 is connected to the second package 402 through the transceiving optical port 4028, so that the receiving light beam transmitted by the optical fiber adapter 500 enters the second package 402 through the transceiving optical port 4028. In some embodiments, the fiber optic adapter 500 is inserted into the second housing 402 through the transceiver port 4028 to achieve a secure connection of the fiber optic adapter 500 to the second housing 402.

A second light outlet 4030 is formed in the fourth surface 4029, the second light outlet 4030 communicates with the internal cavity of the second package 402, and the second light-receiving device 450 is connected to the second package 402 through the fourth surface 4029, so that a second received light beam received by the second package 402 is emitted into the second light-receiving device 450 through the second light outlet 4030. In some embodiments, the second light receiving device 450 may be inserted into the second light outlet 4030, and an outer wall of the second light receiving device 450 is adhesively fixed to an inner wall of the second light outlet 4030.

A first cavity 4037, a second cavity 4033 and a third cavity 4038 are arranged in the second tube shell 402, the first light inlet 4022 and the second light inlet 4024 are communicated with the first cavity 4037, and the optical element 401 is located in the first cavity 4037; the first cavity 4037 is communicated with the third cavity 4038 through the second cavity 4033, the first light outlet 4025, the second light outlet 4030, the transceiver light outlet 4028 are communicated with the third cavity 4038, and the fourth optical splitter 405, the fifth optical splitter 407, and the sixth optical splitter 408 are located in the third cavity 4038.

Fig. 24 is another angle cross-sectional view of another tube shell in the optical module according to the embodiment of the present application. As shown in fig. 24, a support 4031 is disposed in the first chamber 4037, the support 4031 is obliquely disposed, and in a direction from the first light inlet 4022 to the second chamber 4033, the support 4031 is obliquely disposed from top to bottom, that is, a distance between the support 4031 and the second light inlet 4024 gradually increases along an emission direction of the first emission light beam, so that a first angle is formed between the support 4031 and the emission optical axis. In some embodiments, the first angle is 45 degrees.

The transmission surface of the optical element 401 is attached to the support 4031 such that a first angle exists between the optical element 401 and the emission optical axis, the second received light beam emitted by the second light emitting device 430 is reflected by the reflection surface of the optical element 401, and the reflected second emission light beam has the same emission direction as the first emission light beam.

In some embodiments, to facilitate transmission of a first emitted light beam emitted by the first light emitting device 420 through the optical element 401, the support 4031 is provided with an optically transmissive aperture that is in communication with the first cavity 4037. As such, the first emitted light beam emitted by the first light emitting device 420 passes through the first cavity 4037, the light-transmissive hole arrangement optical element 401, and the first emitted light beam directly passes through the optical element 401.

In some embodiments, the light-transmissive holes on the support 4031 may be openings directly or may be platform areas made of a light-transmissive material, so long as the first emitted light beams emitted by the first light emitting device 420 can pass through the optical element 401 through the light-transmissive holes.

In some embodiments, when the first emitted light beam is transmitted through the optical element 401, most (about 95%) of the first emitted light beam directly transmits through the optical element 401, but a part (about 5%) of the first emitted light beam may be reflected at the transmission surface of the optical element 401, and the reflected first emitted light beam may be reflected again at the inner wall of the first cavity 4037, and the reflected first emitted light beam may enter the second light emitting device 430 through the second light inlet 4024, causing crosstalk of the reflected light to the second emitted light beam.

In order to avoid that the reflected first emitted light beam causes crosstalk to the second emitted light beam, a bevel 4032 is provided on an inner wall of the first cavity 4037, the bevel 4032 is located below the support 4031, and a distance between the bevel 4032 and the second light inlet 4024 gradually decreases along an emission direction of the first emitted light beam. In this way, after a part of the first emission light beam is reflected at the transmission surface of the optical element 401, the reflected first emission light beam is reflected again at the inclined surface 4032, and because the inclined surface 4032 is arranged obliquely, the first emission light beam reflected again diverges outward, so that the first emission light beam reflected again can be prevented from entering the second light inlet 4024, and crosstalk of the reflected light to the second emission light beam can be effectively reduced.

In order to reduce the incidence of the beam reflected by the inclined plane 4032 of the first emitted beam into the second light inlet 4024, a second angle is formed between the inclined plane 4032 and the emission optical axis. In some embodiments, the second angle is 20 ° to 50 °.

The first emitted light beam emitted by the first light emitting device 420 is transmitted to the optical fiber adapter 500 through the optical element 401, and due to the change of media and the reflection of light in the interface propagation of different media, when the first emitted light beam passes through the second cavity 4033 and the third cavity 4038 and is emitted to the optical fiber end surface in the optical fiber adapter 500, most of the first emitted light beam directly passes through the optical fiber end surface and is emitted into the optical fiber adapter 500, a small part of the first emitted light beam is reflected at the optical fiber end surface, and the reflected first emitted light beam may return to the first light emitting device 420 along the original path, thereby affecting the emission performance of the first light emitting device 420.

In order to prevent the reflected first emitted light beam from returning to the first light emitting device 420 along the original path, an isolator may be disposed in the second cavity 4033, the first emitted light beam transmitted through the optical element 401 directly passes through the isolator and is incident into the fiber optic adapter 500, and the isolator can isolate the first emitted light beam reflected at the fiber end surface of the fiber optic adapter 500, so as to prevent the reflected first emitted light beam from returning to the first light emitting device 420, thereby ensuring the emission performance of the first light emitting device 420.

In some embodiments, the first light emitting device 420 emits the first emitting beam as a convergent light through the coupling lens at the light emitting end of the first light emitting device 420, and the spot of the convergent light at the focal point is the smallest, so that the isolator can be disposed at the focal point of the first emitting beam, and the size of the isolator is the smallest, so that the aperture of the second cavity 4033 required by the isolator is the smallest, which is beneficial to the volume miniaturization design of the second package 402.

A first mounting platform 4034, a second mounting platform 4036 and a third mounting platform 4035 are arranged in the third cavity 4038, and the first mounting platform 4034 is arranged obliquely, that is, along the emission direction (from left to right) of the first emission light beam, the distance between the first mounting platform 4034 and the light receiving and transmitting port 4028 is gradually reduced.

In some embodiments, the first mounting platform 4034 is provided with a light-transmissive aperture that communicates with the third cavity 4038 such that a first emitted light beam transmitted through the optical element 401 is transmitted through the light-transmissive aperture into the fiber optic adapter 500 and a second emitted light beam reflected by the optical element 401 is transmitted through the light-transmissive aperture into the fiber optic adapter 500.

The side of the fourth splitter 405 is attached to the first mounting platform 4034 and the fourth splitter 405 forms a sixth angle with the optical emission axis. The fourth splitter 405 has a function of reflecting the first received light beam and the second received light beam, and is used for reflecting the first received light beam and the second received light beam transmitted by the optical fiber adapter 500. In some embodiments, the sixth angle is 40 ° to 50 °.

In some embodiments, the portion of the fourth light splitter 405 exposed through the light-transmitting hole is provided with a reflective surface, and when the first receiving light beam and the second receiving light beam transmitted by the fiber optic adapter 500 are incident on the reflective surface of the fourth light splitter 405, the first receiving light beam and the second receiving light beam are reflected at the reflective surface of the fourth light splitter 405.

The second mounting platform 4036 is located below the first mounting platform 4034, and the second mounting platform 4036 is disposed obliquely, that is, along the emission direction of the first emitted light beam (from left to right), the distance between the second mounting platform 4036 and the second light outlet 4030 gradually decreases. A through hole is formed in the second mounting platform 4036, and the third cavity 4038 is communicated with the second light outlet 4030 through the through hole.

The side surface of the fifth beam splitter 407 is attached to the second mounting platform 4036, and a seventh angle is formed between the fifth beam splitter 407 and the emission optical axis. The fifth beam splitter 407 has the functions of reflecting the first received light beam and transmitting the second received light beam, and is configured to transmit the second received light beam reflected by the fourth beam splitter 405 and reflect the first received light beam reflected by the fourth beam splitter 405. In some embodiments, the seventh angle is from 6 ° to 20 °.

In some embodiments, a transmission reflection surface is disposed on a side surface (lower surface) of the fifth optical splitter 407 facing the second light outlet 4030, and the first received light beam and the second received light beam reflected by the fourth optical splitter 405 are incident on the fifth optical splitter 407, and the reflected first received light beam is reflected again by the transmission reflection surface; the second received light beam reflected by the fourth beam splitter 405 directly transmits through the transmission reflection surface, and the second received light beam transmitted through the fifth beam splitter 407 enters the second light receiving device 450 through the second light exit 4030.

If a transflective surface is provided on the upper surface of the fifth splitter 407, the lower surface of the fifth splitter 407 needs to be adhered to the second mounting platform 4036, and the fifth splitter 407 needs to be placed in the through hole of the second mounting platform 4036, which increases the size of the third cavity 4038. However, when the lower surface of the fifth optical splitter 407 is provided with the transmissive and reflective surface, only one through hole is required to be provided to conveniently receive the light beam emitted to the fifth optical splitter 407, so that the size of the second package 402 can be effectively reduced, which is beneficial to the miniaturization design of the second package 402.

In some embodiments, to facilitate the mounting of the fifth beam splitter 407 on the second mounting platform 4036, a fixing member may be further disposed in the third cavity 4038, the fixing member is obliquely mounted on the second mounting platform 4036, and a light through hole is disposed on the fixing member, the fifth beam splitter 407 is mounted on a lower surface of the fixing member, and the fifth beam splitter 407 is disposed corresponding to the light through hole, so that the size of the fifth beam splitter 407 can be reduced.

In some embodiments, the fixture may be a disk, a light hole is formed in the center of the disk, the side of the disk is adhered to the second mounting platform 4036, and the fifth light splitter 407 is mounted in the center of the disk.

The third mounting platform 4035 is positioned obliquely above the first mounting platform 4034, and the third mounting platform 4035 is arranged obliquely, that is, along the emission direction of the first emitted light beam (from left to right), the distance between the third mounting platform 4035 and the second light outlet 4030 gradually decreases. A light through hole is formed in the third mounting platform 4035, and the third cavity 4038 is communicated with the first light outlet 4025 through the light through hole.

The side of the sixth beam splitter 408 is attached to the third mounting platform 4035, and an eighth angle is formed between the sixth beam splitter 408 and the emission optical axis. The sixth beam splitter 408 has a function of transmitting the first received light beam for transmitting the first received light beam reflected again by the fifth beam splitter 407. In some embodiments, the eighth angle is between 10 ° and 22 °.

In some embodiments, a side surface (lower surface) of the sixth beam splitter 408 facing the fifth beam splitter 407 is provided with a transmission surface, the first received light beam reflected by the fifth beam splitter 407 directly passes through the transmission surface of the sixth beam splitter 408, and the first received light beam passing through the sixth beam splitter 408 is incident into the first light receiving device 440 through the first light outlet 4025.

In some embodiments, a mounting slot is provided in the fixed table 4026, the mounting slot including a fourth mounting platform 4039, the fourth mounting platform 4039 having a through hole provided therein in communication with the third mounting platform 4035. The fourth mounting platform 4039 is obliquely arranged, and along the emission direction of the first emitted light beam, the distance between the fourth mounting platform 4039 and the central axis of the second tube shell 402 gradually decreases, that is, the inclination direction of the fourth mounting platform 4039 is the same as the inclination direction of the third mounting platform 4035.

The first light receiving device 440 is obliquely inserted into the mounting groove of the fixing stand 4026, the cap outer side of the first light receiving device 440 is in contact with the fourth mounting platform 4039, and the incident lens of the first light receiving device 440 can be placed in the through hole of the fourth mounting platform 4039, so that the first light receiving device 440 is obliquely disposed on the second package 402 through the mounting groove of the fixing stand 4026.

An eighth angle may be formed between the fourth mounting platform 4039 and the emission optical axis in the second housing 402, that is, the angle between the fourth mounting platform 4039 and the emission optical axis and the angle between the third mounting platform 4035 and the emission optical axis may be the same, and the fourth mounting platform 4039 and the third mounting platform 4035 are arranged in parallel.

In some embodiments, the angle between the fourth mounting platform 4039 and the optical axis of the transmission, and the angle between the third mounting platform 4035 and the optical axis of the transmission may also be different, with a smaller angle between the fourth mounting platform 4039 and the third mounting platform 4035. In some embodiments, the angle between the fourth mounting platform 4039 and the transmit optical axis is 22 °.

In some embodiments, a sixth angle between the fourth beam splitter 405 and the emission axis within the second tube shell 402 is 44 °, a seventh angle between the fifth beam splitter 407 and the emission axis is 9.5 °, and an eighth angle between the sixth beam splitter 408 and the emission axis is 21 °. The first received light beam and the second received light beam transmitted by the optical fiber adapter 500 are reflected to the fifth optical splitter 407 through the fourth optical splitter 405, the reflected second received light beam directly passes through the fifth optical splitter 407, the reflected first received light beam is reflected again at the fifth optical splitter 407, and the reflected first received light beam directly passes through the sixth optical splitter 408.

In some embodiments, the fourth light splitter 405, the fifth light splitter 407, and the sixth light splitter 408 may be filters, prisms with filters or filter films attached thereto, or other structures, and are not limited in this respect.

In some embodiments, the fourth light splitter 405, the fifth light splitter 407, and the sixth light splitter 408 are all filters, and the filters have a small size and occupy a small space, which is beneficial to the volume miniaturization design of the second package 402.

The wavelength of the first receiving light beam may be 1270nm, 1310nm, 1490nm, 1577nm, or the like, and is not particularly limited herein; accordingly, the wavelength of the second received light beam may be 1270nm, 1310nm, 1490nm, 1577nm, etc., and is not particularly limited herein.

In some embodiments, the first received beam has a wavelength of 1270nm and the second received beam has a wavelength of 1310nm, such that the fourth splitter 405 has the function of reflecting wavelengths of 1270nm and 1310nm, the fifth splitter 407 has the function of transmitting wavelengths of 1310nm and reflecting wavelengths of 1270nm, and the fifth splitter 407 has the function of isolating wavelengths of 1490nm, 1577nm, etc.; the sixth beam splitter 408 has the effect of transmitting a wavelength of 1270 nm.

Fig. 25 is a schematic structural diagram of another optical transceiver in the optical module according to the embodiment of the present application. As shown in fig. 25, the optical fiber adapter 500 includes a connection sleeve, an inner optical fiber 530, an outer sleeve and an inner sleeve, one end of the connection sleeve is fixedly connected with the outer sleeve, and the other end of the connection sleeve is fixedly connected with the third surface 4027 of the second package 402; the inner sleeve is secured to the inner chamber side wall of the outer sleeve and the inner optical fiber 530 is secured within the inner chamber of the outer sleeve through the inner sleeve. The connecting sleeve is provided with a mounting hole which is communicated with the inner cavity of the outer sleeve, a convergent lens 510 is arranged in the mounting hole, the convergent lens 510 protrudes out of the connecting sleeve, and the convergent lens 510 is inserted into the third cavity 4038 through the light receiving and transmitting port 4028. In this way, the first and second received light beams transmitted by the internal optical fiber 530 in the fiber adapter 500 are converted into a collimated light beam by the converging lens 510, and the collimated light beam is emitted to the fourth splitter 405 by the third cavity 4038.

The third cavity 4038 is further provided with an assembly hole, the assembly hole is provided with a first lens 403 therein, the first lens 403 is located between the isolator 600 and the fourth optical splitter 405, the first lens 403 is a collimating lens and is configured to convert the first emission beam transmitted through the optical element 401 and the second emission beam reflected at the optical element 401 into parallel beams respectively, the parallel beams directly transmit through the fourth optical splitter 405 and enter the converging lens 510, the parallel beams are converted into converging beams through the converging lens 510, and the converging beams are converged into the internal optical fiber 530.

When assembling the optical transceiver module 400, first inserting the first lens 403 into the assembly hole in the third cavity 4038, then directly bonding the fourth splitter 405 to the first mounting platform 4034 by passive bonding, directly bonding the mount 406 to the second mounting platform 4036 by passive bonding, fixing the fifth splitter 407 to the mount 406, and directly bonding the sixth splitter 408 to the third mounting platform 4035 by passive bonding; the fiber optic adapter 500 with the collection lens 510 mounted thereon is then inserted into the third cavity 4038 through the transceiver port 4028 such that the first lens 403 is actively coupled to the collection lens 510.

In some embodiments, first lens 403 is placed directly in a mounting hole in third cavity 4038, and convergence lens 510 is inserted into third cavity 4038 with fiber adapter 500, and first lens 403 and convergence lens 510 are actively coupled, so that first lens 403 has low requirements on the position in third cavity 4038, precision requirements are also low, and assembly of first lens 403 is facilitated.

After the optical element 401, the isolator 600, the first lens 403, the fourth splitter 405, the fifth splitter 407, and the sixth splitter 408 are assembled in the second package 402, the first light emitting device 420 is laser-welded to the first surface 4021 of the second package 402 through the adjustment sleeve, so that the first emission light beam emitted by the first light emitting device 420 is incident into the first cavity 4037 through the first light inlet 4022; then the second light emitting device 430 is inserted into the second package 402 through the second light inlet 4024; then, the first light receiving device 440 is connected to the second package 402 through the fixing stand 4026, and the first light receiving device 440 is fixedly connected to the second package 402 through bonding glue; then, the second light receiving device 450 is inserted into the second package 402 through the second light exit 4030, and the second light receiving device 450 is fixedly connected to the second package 402 through the bonding glue; thus, the assembly of the optical transceiver module 400 is completed.

After the optical transceiver module 400 is assembled, the first emitting light beam emitted by the first light emitting device 420 sequentially passes through the optical element 401 and the isolator 600, the first emitting light beam passing through the isolator 600 is converted into a parallel light beam by the first lens 403, and the parallel light beam passes through the fourth beam splitter 405 and is emitted into the inner fiber 530 of the fiber adapter 500 by the converging lens 510, so that the emitting of the first emitting light beam is realized.

The second emission light beam emitted by the second light emitting device 430 is reflected by the optical element 401, the reflected second emission light beam transmits through the isolator 600, the second emission light beam transmitted through the isolator 600 is converted into a parallel light beam by the first lens 403, the parallel light beam transmits through the fourth beam splitter 405 and is emitted into the inner fiber 530 of the fiber adapter 500 by the converging lens 510, and the emission of the second emission light beam is realized.

In some embodiments, the first emission beam and the second emission beam may be combined at the optical element 401, that is, the second emission beam is reflected at the optical element 401, the reflected second emission beam is combined with the first emission beam transmitted through the optical element 401, the combined light is transmitted through the isolator 600, the combined light transmitted through the isolator 600 is converted into a parallel beam through the first lens 403, and the parallel beam is transmitted through the fourth beam splitter 405 and is emitted into the internal fiber 530 of the fiber adapter 500 through the converging lens 510, so that the emission of the first emission beam and the second emission beam is realized.

The first receiving light beam and the second receiving light beam transmitted by the optical fiber adapter 500 are converted into a first receiving parallel light and a second receiving parallel light through the converging lens 510, the first receiving parallel light and the second receiving parallel light are reflected to the fifth optical splitter 407 through the fourth optical splitter 405, and the reflected second receiving parallel light directly penetrates through the fifth optical splitter 407 and enters the second light receiving device 450, so that the second receiving light beam is received.

The first receiving parallel light reflected by the fourth beam splitter 405 is reflected again by the fifth beam splitter 407, and the first receiving light beam reflected again directly passes through the sixth beam splitter 408 and enters the first light receiving device 440, so that the first receiving light beam is received.

In some embodiments, the first receiving light beam and the second receiving light beam transmitted by the fiber adapter 500 may be separate lights with different wavelengths, or may be a combined light including the first receiving light beam and the second receiving light beam.

In some embodiments, the first received light beam transmitted by the fiber optic adapter 500 is 1270 ± 10nm wavelength received light and the second received light beam is 1310 ± 20nm wavelength received light, i.e., the first received light beam may be 1280nm wavelength received light and the second received light beam may be 1290nm wavelength received light, such that the first received light beam is separated from the second received light beam by a small distance. Through the light splitting action of the fourth light splitter 405, the fifth light splitter 407 and the sixth light splitter 408 provided by the application, the first receiving light beam and the second receiving light beam with smaller wavelength intervals can be separated, and the dense wave splitting function is realized.

In this application, the optical path system of 3 lenses (the coupling lens in the first light emitting device 420, the first lens 403 in the second package 402, and the converging lens 510 in the fiber adapter 500) and the optical path design of converting the converging light into the parallel light are adopted, so as to improve the coupling efficiency of the optical transceiver module 400. The innovative light splitting design can realize the dense wave splitting function within 6nm, and compared with other schemes in the industry, the light splitting design can better meet the wave splitting requirement required by the protocol of a Com-PON product under the condition of lower cost. The special light path design can realize two-way transmission and two-way reception by using the best optical filter and the minimum insertion loss.

In some embodiments, when the first light receiving device 440 receives the first receiving light beam transmitted by the package and the second light receiving device 450 receives the second receiving light beam transmitted by the package, the light receiving device has a receiving return loss and a responsivity index when receiving light, and the receiving return loss and the responsivity index are mutually balanced.

The traditional design is that coating reflection is carried out on a chip in order to improve the responsivity of a receiving PD chip, so that the received light is reflected back after being absorbed by the PD and is absorbed again, thereby improving the responsivity of the PD, but causing the received return loss index to crack. In order to improve the return loss index and reduce the reflection, the index of the responsivity is inevitably sacrificed.

Fig. 26 is a schematic structural diagram of a light receiving device in an optical module according to an embodiment of the present application. As shown in fig. 26, in order TO solve the above problem, the second light receiving device 450 is described by taking as an example the second light receiving device 450, the second light receiving device 450 includes a TO stem, a carrier 4501 and a PD chip 4502, the carrier 4501 is disposed on the TO stem, and one end of the carrier 4501 facing away from the surface of the TO stem is provided with a slope which is inclined downward from left TO right, that is, the distance between the slope and the central axis of the package gradually increases along the light emission direction in the package. In some embodiments, the angle between the inclined plane and the emission optical axis is 12 °.

The PD chip 4502 is provided on an inclined surface of the carrier 4501 so that the PD chip 4502 is fixed obliquely TO the TO stem. Thus, when the second received light beam is transmitted through the optical splitter to the PD chip 4502, the PD chip 4502 and the received light path are designed to be non-orthogonal, and part of the received light is reflected at the PD chip 4502, but the reflected received light does not affect the received light transmitted to the PD chip 4502, so that the received return loss index is greatly improved, but the effect on the received responsivity index is small, and the compatibility between the received return loss and the responsivity index is realized.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims (10)

1. A light module, comprising:

a circuit board;

an optical assembly electrically connected to the circuit board;

a fiber optic adapter connected to the optical assembly;

wherein the light assembly comprises:

the second tube shell comprises an inner cavity, a first light outlet, a second light outlet and a light receiving and transmitting port, wherein the first light outlet, the second light outlet and the light receiving and transmitting port are communicated with the inner cavity; a protruding fixing table is arranged on the light source, a mounting groove is formed in the fixing table, an opening is formed in one end of the mounting groove, an inclined mounting platform is arranged at the other end of the mounting groove, and the mounting platform is communicated with the first light outlet; along the light receiving direction emitted by the optical fiber adapter, the distance between the mounting platform and the central axis of the second tube shell is gradually increased;

the first lens is arranged in the inner cavity and is in active coupling connection with the converging lens at the end part of the optical fiber adapter;

the optical splitter component is arranged between the first lens and the converging lens, comprises a fourth optical splitter, a fifth optical splitter and a sixth optical splitter and is used for reflecting and splitting received light with different wavelengths transmitted by the optical fiber adapter;

the first light receiving device is arranged on the mounting platform, has a preset angle with the second tube shell and is used for receiving received light reflected by the fourth optical splitter and the fifth optical splitter and transmitted by the sixth optical splitter;

and the second light receiving device is inserted into the second light outlet and used for receiving the received light reflected by the fourth optical splitter and transmitted by the fifth optical splitter.

2. The optical module of claim 1, wherein a first mounting platform, a second mounting platform, and a third mounting platform are disposed in the inner cavity, the first mounting platform faces the light receiving/emitting port, a sixth angle is formed between the first mounting platform and a light emitting direction in the second tube shell, and the fourth optical splitter is disposed on the first mounting platform;

the second mounting platform faces the second light outlet, a seventh angle is formed between the second mounting platform and the light emitting direction, and the fifth light splitter is arranged on the second mounting platform;

the third mounting platform faces the first light outlet, an eighth angle is formed between the third mounting platform and the light emission direction, and the sixth light splitter is arranged on the third mounting platform.

3. The optical module of claim 2, further comprising a fixture disposed on the second mounting platform, wherein the fifth splitter is disposed on the fixture.

4. The optical module according to claim 3, wherein a transmission and reflection surface is disposed on a side of the fifth splitter facing the second light outlet, and the transmission and reflection surface is configured to reflect the first received light reflected by the fourth splitter again and transmit the reflected second received light.

5. The optical module according to claim 2, wherein a sixth angle between the fourth beam splitter and the light emission direction is 40 ° to 50 °, a seventh angle between the fifth beam splitter and the light emission direction is 6 ° to 20 °, and an eighth angle between the sixth beam splitter and the light emission direction is 10 ° to 22 °.

6. The light module of claim 5, wherein the sixth angle is 44 °, the seventh angle is 9.5 °, and the eighth angle is 21 °.

7. The optical module according to claim 2, wherein the mounting platform disposed at one end of the mounting groove is a fourth mounting platform, and a through hole is disposed on the fourth mounting platform, and the fourth mounting platform is communicated with the third mounting platform through the through hole.

8. The optical module according to claim 7, wherein the outer side surface of the cap of the first light receiving device is in contact connection with the fourth mounting platform, and the incident lens of the first light receiving device is disposed in the through hole of the fourth mounting platform.

9. The light module of claim 7, wherein an angle between the fourth mounting platform and the light emission direction is 22 °.

10. The light module of claim 1, wherein the fourth splitter, the fifth splitter, and the sixth splitter are each a filter.

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