WO2021212375A1

WO2021212375A1 - Optical device and optical module

Info

Publication number: WO2021212375A1
Application number: PCT/CN2020/086189
Authority: WO
Inventors: 张立昆; 丰涛
Original assignee: 华为技术有限公司
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2021-10-28
Also published as: CN115315905A

Abstract

Disclosed in the present application are an optical device and an optical module, specifically relating to the technical field of high-speed optical communications. The optical device comprises an optical transmitting assembly, an optical receiving assembly, a first flexible board, a second flexible board and a third flexible board. The optical transmitting assembly and the optical receiving assembly are arranged in a stacked manner. A first radio-frequency circuit electrically connected to the optical transmitting assembly is arranged on the first flexible board. A second radio-frequency circuit electrically connected to the optical receiving assembly is arranged on the second flexible board. The third flexible board comprises a first connecting part, a second connecting part and an extension part; a first direct-current circuit is formed on the first connecting part; a second direct-current circuit is formed on the second connecting part; the first connecting part is bent relative to the second connecting part so as to make the first direct-current circuit be electrically connected to the optical transmitting assembly and make the second direct-current circuit be electrically connected to the optical receiving assembly; and a first board-to-board connector electrically connected to the first direct-current circuit and the second direct-current circuit respectively is arranged on the extension part. The optical device can meet the requirements of miniaturization design and packaging of an optical module.

Description

Optical device and optical module

Technical field

This application relates to the technical field of high-speed optical communication, and in particular to an optical device and an optical module.

Background technique

Optical modules are generally composed of optoelectronic devices, functional circuits, hardware circuits and structural parts that encapsulate software, etc. through process assembly, and are mainly products that convert electrical signals into optical signals and optical signals into electrical signals. With the development of science and technology, the package volume of optical modules is getting smaller and smaller. 400G optical modules have changed from the early CFP (Ceramic flat packs) package that did not require multi-source protocol to CFP8 package that satisfies multi-source protocol. To conform to QSFP-DD (Quad small form dactor pluggable-double density, dual-density four-channel small pluggable package) multi-source protocol package, the total package is reduced by about 74% of the space. Of course, as the package volume of the optical module decreases, the requirements for the package of the optical device are getting higher and higher, and higher requirements are also put forward for the design of the optical device.

In order to reduce the package size of the optical device, the light emitting device and the light receiving device can be combined by a stacked design. However, in the prior art, the radio frequency circuit and the DC circuit in the optical device share the same circuit board, and there will be radio frequency circuits. The problem of mixing of high-speed electrical signals and DC electrical signals and the heat dissipation of optical devices; if the independent light emitting device and the light receiving device are sealed into a structure after a special structure treatment, a double-pad circuit board is required to connect the light emitting device and the optical device. The respective RF circuit and DC circuit of the receiving device are integrated on a circuit board, which is convenient for assembly with the printed circuit board of the optical module. This kind of optical device has the problems of difficult design, poor stability, poor reliability, and poor manufacturability; in addition, This kind of optical device packaging is only suitable for optical modules with simple control circuits, and all circuit layouts are limited to a single PCB board. It is not applicable to optical modules with complex control circuits and cannot be laid out on a single PCB board.

It can be seen that there are still many problems in the current design of optical devices adapted to 400G optical modules, which cannot meet the design requirements of miniaturized optical modules.

Summary of the invention

The present application provides an optical device and an optical module, which can meet the packaging design requirements of the miniaturization of the optical module.

In the first aspect, the present application provides an optical device, which specifically includes a light transmitting assembly, a light receiving assembly, a first flexible board, a second flexible board, and a third flexible board; the stacked arrangement of the light transmitting assembly and the light receiving assembly can save space. A first radio frequency circuit electrically connected to the optical transmitting component is provided on a flexible board, and the first radio frequency circuit can modulate the fundamental frequency signal of the optical transmitting component to a radio frequency signal and transmit it; the second flexible board is provided with a light receiving component The second radio frequency circuit is electrically connected. The second radio frequency circuit can convert the external radio frequency signal to obtain the fundamental frequency signal for the light receiving component to receive; the first flexible board and the second flexible board can make the radio frequency signals of the light transmitting component and the light receiving component mutually exchange. Independent; and the direct current signals of the optical transmitting component and the optical receiving component are realized on the same third flexible board. The third flexible board includes a first connecting portion, a second connecting portion and an extension portion, and a second connecting portion is provided on the first connecting portion. A DC circuit, a second DC circuit is arranged on the second connecting part, and a first board-to-board connector is arranged on the extension part, and the first board-to-board connector is electrically connected to the first DC circuit and the second DC circuit, respectively ; Because the third flexible board is a flexible structure, the first connecting portion can be bent relative to the second connecting portion, so that the first DC circuit on the first connecting portion is electrically connected to the optical transmitting component, and the second connecting portion on the second 2. The direct current line is electrically connected to the optical receiving component, and the direct current power supply or monitoring signal of the optical transmitting component and the optical receiving component is gathered on the third flexible board; when the optical component is docked with the printed circuit board interface of the optical module, the first board passes through The board-to-board connector can transmit the DC power supply or monitoring signal converged on the third flexible board to the printed circuit board interface of the optical module, which can meet the requirements of complex control circuits and more monitoring signals.

The optical device connects the optical transmitting component with the radio frequency circuit and the optical receiving component through a third foldable flexible board to form an optical device that combines optical transceivers. The radio frequency signal is separated from the DC signal, which solves the problem of high frequency signal and DC signal. The signal mixing interference problem can also meet the needs of complex control circuits and more monitoring signals, and it is relatively simple and convenient to upgrade the optical device to an optical device with more channels or larger capacity (for example, 400G optical modules can be used without Seam upgrade to 800G optical module), which can meet the miniaturized packaging requirements of optical modules.

In one possible way, the superposition of the optical transmitting assembly and the optical receiving assembly is realized in a head-to-head and tail-to-end manner, that is, the head end of the optical transmitting assembly is opposite to the head end of the optical receiving assembly, and the optical transmitting assembly The tail end of the optical receiving component is opposite to the tail end of the optical receiving component, which makes it easier to set other components; the first flexible board is connected to the tail end of the optical transmitting component, and the second flexible board corresponds to the first flexible board. The board is connected to the tail end of the optical receiving component, such a corresponding relationship can realize a separate electrical connection between the two radio frequency circuits and the printed circuit board interface of the optical module.

In a possible implementation manner, the head end of the optical transmitting component is provided with a first optical port, and the head end of the optical receiving component is provided with a second optical port. In, used to connect fiber optic cables.

In a possible implementation manner, a first connecting protrusion is provided at the tail end of the optical transmitting component, and the thickness of the first connecting protrusion is smaller than the thickness of the optical transmitting component. Correspondingly, a first connecting protrusion is provided at the tail end of the optical receiving component. Two connecting protrusions, the thickness of the second connecting protrusion is smaller than the thickness of the light receiving component, and a receiving space for the printed circuit board interface of the optical module is formed between the first connecting protrusion and the second connecting protrusion, which is convenient for light The device is connected with the printed circuit board interface of the optical module.

Specifically, the first flexible board is connected to the side of the first connecting protrusion facing the second connecting protrusion, the second flexible board is connected to the side of the second connecting protrusion facing the first connecting protrusion, and the first flexible board Opposite to the second flexible board, the first radio frequency circuit and the second radio frequency circuit can be independently electrically connected with the printed circuit board interface of the optical module.

The first connecting portion of the third flexible board is connected to the side of the first connecting protrusion away from the second connecting protrusion, and the second connecting portion of the third flexible board is connected to the second connecting protrusion away from the first connecting protrusion. On one side, therefore, the first connecting portion, the first flexible board, the second flexible board, and the second connecting portion correspond in position and are distributed in a layered order, which is convenient for docking with the printed circuit board interface of the optical module.

Here, the surface of the first connecting protrusion away from the second connecting protrusion can be lower than the surface of the optical transmitting component away from the light receiving component, so that the first connecting portion does not protrude from the surface of the optical transmitting component away from the light receiving component, which is convenient The first connecting portion is electrically connected to the optical transmitting component; correspondingly, the surface of the second connecting protrusion facing away from the first connecting protrusion may be lower than the surface of the light receiving assembly facing away from the optical transmitting assembly, so that the second connecting portion does not protrude On the surface of the light receiving component facing away from the light transmitting component, it is convenient for the second connecting portion to be electrically connected to the light receiving component, so that after the light transmitting component and the light receiving component are connected to the third flexible board, the third flexible board does not increase the overall optical device The thickness is conducive to the realization of miniaturization of the package.

In a possible implementation manner, the first board-to-board connector provided on the extension portion of the third flexible board corresponds to the first connection portion, and of course it can also correspond to the second connection portion, depending on the optical module to be connected. The structure of the printed circuit board interface is adjusted.

In a second aspect, the present application also provides an optical module, including a printed circuit board interface and any of the above-mentioned optical devices. In order to interface with the above-mentioned optical device, the printed circuit board interface here includes a laminated first printed circuit board. The circuit board and the second printed circuit board; corresponding to the first board-to-board connector in the optical device, a second board-to-board connector is formed on the first printed circuit board, and the printed circuit board interface and the optical When the devices are connected, the second board-to-board connector is electrically connected to the above-mentioned first board-to-board connector; and the second printed circuit board has a first connection surface and a second connection surface, and a first connection surface is formed on the first connection surface. Connecting circuit, a second connecting circuit is formed on the second connecting surface, and the first connecting surface is used to connect the first flexible board to electrically connect the first connecting circuit with the first radio frequency circuit. The converted radio frequency signal is transmitted to the printed circuit board, and the second connection surface is used to connect the second flexible board to electrically connect the second connection circuit with the second radio frequency circuit, which can convert the high frequency signal of the printed circuit board and transmit it to the printed circuit board. Light receiving components. In addition, ground points are respectively formed on the first connection surface and the second connection surface.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an optical device provided by this application;

2 is a schematic structural diagram of a third flexible board in a folded state in an optical device provided by this application;

FIG. 3 is a schematic structural diagram of a third flexible board in an optical device provided by this application in an unfolded state;

FIG. 4 is a schematic diagram of a structure in which a light transmitting component is connected to a first flexible board, and a light receiving component is connected to a second flexible board in an optical device provided by this application;

Fig. 5 is a schematic structural diagram of the structure shown in Fig. 4 after being turned over;

Fig. 6 is a schematic structural diagram of the structure shown in Fig. 5 connected to a third flexible board;

FIG. 7 is a schematic structural diagram of the structure shown in FIG. 6 after being turned over;

FIG. 8 is a schematic diagram of folding the second connecting portion of the third flexible board relative to the first connecting portion in the structure shown in FIG. 6; FIG.

FIG. 9 is a front view of an optical device provided by this application;

Fig. 10 is a schematic sectional view of A-A in Fig. 9;

FIG. 11 is a schematic structural diagram of an optical module provided by this application;

FIG. 12 is a schematic structural diagram of a printed circuit board interface in an optical module provided by this application.

Reference signs: 100-optical module; 10-optical device; 20-printed circuit board interface; 1-optical transmitting component; 11-first connecting protrusion; 12-second connecting protrusion; 2-optical receiving component; 3-first flexible board; 4-second flexible board; 5-third flexible board; 511-first connecting part; 512-second connecting part; 52-extension part; 61-first optical port; 62-th Two optical ports; 7-first board-to-board connector; 8-first printed circuit board; 81-second board-to-board connector; 9-second printed circuit board; 91-grounding point.

Detailed ways

As an important part of the optical module, the structure of the optical device has a greater impact on the packaging of the optical module, and as the requirements for the packaging of the optical module increase, higher requirements are put forward for the design of the optical device. In order to reduce the package size, the current optical device has improved the structure of the optical device to reduce the size, but it also brings other performance problems, which affects the realization of multi-channel optical devices, and cannot meet the high packaging design requirements of optical device miniaturization. Require.

Based on this, this application proposes an optical device, which rationalizes the structure of the optical device, so that the optical device can meet the requirements of miniaturization, and the function of the optical device is not affected, which is beneficial to realize the multi-channel optical device. And high capacity. The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 for the optical device 10 provided by the embodiment of the present application. The optical device 10 includes a light transmitting component 1, a light receiving component 2, a first flexible board 3, a second flexible board 4, and a third flexible board 5; The transmitting assembly 1 and the light receiving assembly 2 are arranged in a layered manner. Specifically, as shown in FIG. 1, the optical transmitting assembly 1 and the light receiving assembly 2 are arranged in a head-to-head and end-to-end manner; The two flexible boards 4 and the third flexible board 5 are both arranged at the tail end of the light transmitting assembly 1 and the light receiving assembly 2. Here, the first flexible board 3 is provided with a first radio frequency circuit electrically connected to the optical transmitting component 1. The first radio frequency circuit can modulate the fundamental frequency signal of the optical transmitting component 1 to a radio frequency signal and transmit it. Correspondingly, The second flexible board 4 is provided with a second radio frequency circuit electrically connected to the light receiving assembly 2. The second radio frequency circuit can convert an external radio frequency signal into a fundamental frequency signal for the light receiving assembly 2 to receive. The first flexible board 3 is connected to the The separation of the second flexible board 4 facilitates the separation of the high-speed radio frequency signals of the optical transmission module 1 and the optical receiving module 2. The independent design of the optical transmission module 1 and the optical receiving module 2 can facilitate the layout of multiple complex optoelectronic devices within each optical module and the heat dissipation problem . The third flexible board 5 simultaneously connects the light transmitting assembly 1 and the light receiving assembly 2 in a folded three-dimensional structure. A first DC circuit and a second DC circuit are formed on the third flexible board 5. The component 1 is electrically connected, and the second DC circuit is electrically connected to the light receiving component 2 to converge the DC signal or monitoring signal of the light transmitting component 1 and the light receiving component 2 on the same flexible circuit board (that is, the third flexible board 5); The three flexible board 5 is also provided with a first board-to-board connector 7. The first board-to-board connector 7 is electrically connected to the above-mentioned first DC circuit and the second DC circuit, respectively, and the first board-to-board connector 7 can be connected to The printed circuit board interface of the optical module can be connected to meet the needs of complex control circuits and more monitoring signals; a first optical port 61 is also provided at the head end of the optical transmitting assembly 1, and correspondingly set at the head end of the optical receiving assembly 2. There is a second optical port 62, and the first optical port 61 and the second optical port 62 are arranged side by side, and are packaged in a structural member to facilitate the connection of the first optical port 61 and the second optical port 62 to the optical fiber cable.

Specifically, the structure of the third flexible board 5 is a folded state of a flexible circuit board, please refer to the schematic diagram of the folded structure of the third flexible board 5 shown in FIG. 2 and the schematic diagram of the unfolded structure of the third flexible board 5 shown in FIG. 3 The third flexible board 5 includes a first connecting portion 511, a second connecting portion 512, and an extension portion 52. The first DC circuit is formed on the first connecting portion 511, and the second DC circuit is formed on the second connecting portion 512. The first connecting portion 511 can be bent relative to the second connecting portion 512 to the surface of the optical transmitting component 1 in FIG. The connecting portion 512 can be bent relative to the first DC circuit to the surface of the light receiving component 2 in FIG. 1 facing away from the light transmitting component 1 to electrically connect the second DC circuit to the light receiving component 2. The folded state is not limited to the bending action during the connection; here, the electrical connection between the first connecting portion 511 and the optical transmitting assembly 1 and the electrical connection between the second connecting portion 512 and the optical receiving assembly 2 Both can be connected through a single pad, the manufacturing process is simpler, and the structure stability is also improved without affecting the performance of the optical device 10; it is understandable that the pad structure is not shown here. After the first DC circuit on the first connecting portion 511 is electrically connected to the optical transmitting component 1, and the second DC circuit on the second connecting portion 512 is electrically connected to the optical receiving component 2, the optical transmitting component 1 and the optical receiving component 2 can be electrically connected. The DC power supply or monitoring signal of the component 2 is converged on the third flexible board 5. Please continue to refer to Figures 2 and 3, the above-mentioned first board-to-board connector 7 is provided on the extension portion 52. In actual use, the optical device 10 needs to be interfaced with the printed circuit board of the optical module and converge on the third The DC power supply or monitoring signal of the optical transmitting component 1 and the optical receiving component 2 on the flexible board 5 can be transmitted to the printed circuit board interface of the optical module via the first board-to-board connector 7, so as to solve the complicated control circuit and more. The problem of multi-monitoring signal demand. On the third flexible board 5 shown in FIG. 3, the extension portion 52 is provided corresponding to the first connection portion 511. Of course, the extension portion 52 can also be provided corresponding to the second connection portion 512. The printed circuit board interface is determined. Therefore, the third flexible board 5 in the present application has the characteristics of flexibility and bendability, and a more complex and smaller packaged optical device 10 can be completed by adopting a simple and conventional process design. The receiving component 2 is combined into an optical device with a combination of receiving and transmitting, which can meet the design of an optical module with a larger number of channels and a larger capacity; of course, due to its simple process, the R&D cost of the optical module can be reduced.

With reference to the structure of the third flexible board 5 shown in FIG. 3, the connection process of the light transmitting assembly 1, the light receiving assembly 2 and the third flexible board 5 in the optical device 10 in the present application will be described in detail. First, as shown in Fig. 4, the optical transmitting assembly 1 and the optical receiving assembly 2 are arranged side by side, and the first flexible board 3 is connected to the optical transmitting assembly 1, so that the first radio frequency circuit on the first flexible board 3 and the optical transmitting assembly 1 are realized Electrical connection; connect the second flexible board 4 to the light receiving assembly 2, so that the second radio frequency circuit on the second flexible board 4 is electrically connected to the light receiving assembly 2; then, flip the structure shown in FIG. 5; Next, as shown in FIG. 6, the third flexible board 5 shown in FIG. 3 is welded to the structure shown in FIG. The first DC circuit is electrically connected to the optical transmitting component 1, and the second DC circuit on the second connecting portion 512 is electrically connected to the connecting optical receiving component 2. The first flexible board 3 in FIG. 6 is electrically connected to the third flexible board 5. The extension part 52 is shielded and not shown. You can refer to the structure shown in FIG. 7 after turning left and right in FIG. 6, and you can see the structure of the first flexible board 3, the second flexible board 4, and the third flexible board 5; For reference, the second connecting portion 512 of the third flexible board 5 is folded in the direction shown by the rotating arrow in FIG. 8 relative to the first connecting portion 511, so that the final state of the third flexible board 5 is as shown in FIG. As shown, the light receiving assembly 2 is driven to turn over until the light receiving assembly 2 is under the light sending assembly 1, and the two realize a laminated structure, and the structure of the optical device 10 shown in FIG. 1 can be obtained. It can be understood that the structure of the third flexible board 5 in FIGS. 2 to 8 is only for simple illustration, and the details are not shown in detail as shown in FIG. 1.

In a possible implementation manner, referring to the front view of an optical device 10 shown in FIG. 9, a first connecting protrusion 11 is provided at the end of the optical transmitting assembly 1. The tail end is provided with a second connecting protrusion 12, the thickness of the first connecting protrusion 11 is smaller than the thickness of the optical transmitting assembly 1, and the thickness of the second connecting protrusion 12 is smaller than the thickness of the light receiving assembly 2. A accommodating space M for connecting the printed circuit board interface of the optical module is formed between 11 and the second connecting protrusion 12, which facilitates the connection of the optical device 10 and the printed circuit board interface of the optical module; as shown in FIG. 9, the first The flexible board 3 is connected to the side of the first connecting protrusion 11 facing the second connecting protrusion 12, and the second flexible board 4 is connected to the side of the second connecting protrusion 12 facing the first connecting protrusion 11. The board 3 is opposite to the second flexible board 4, which is convenient for docking with the printed circuit board interface of the optical module; and the first connecting portion 511 and the first connecting protrusion 11 on the third flexible board 5 are away from the second connecting protrusion 12 One side is connected, and the second connecting portion 512 is connected to the side of the second connecting protrusion 12 away from the first connecting protrusion 11. Finally, in the optical device 10, the first connecting portion 511, the first flexible board 3, and the second The flexible board 4 and the second connecting portion 512 are sequentially arranged in layers from top to bottom.

In order to facilitate the structural design, please continue to refer to FIG. The first connecting portion 511 connected to the surfaces of the two connecting protrusions 12 does not protrude from the surface of the light transmitting assembly 1 facing away from the light receiving assembly 2; correspondingly, the surface of the second connecting protrusion 12 facing away from the first connecting protrusion 11 is lower than The light receiving component 2 faces away from the surface of the light transmitting component 1, so that the second connecting portion 512 connected to the surface of the second connecting protrusion 12 away from the first connecting protrusion 11 does not protrude from the light receiving device 2 away from the light transmitting device 1 For the surface, refer to the schematic cross-sectional structure of AA in FIG. 9 as shown in FIG. 10. The third flexible board 5 will not increase the thickness of the optical device 10 after being connected to the optical transmitting assembly 1 and the optical receiving assembly 2, which facilitates the miniaturization of the optical device 10 package. The realization.

Based on the structure of the above-mentioned optical device 10, the present application also provides an optical module 100. As shown in FIG. For docking, the printed circuit board interface 20 here includes a first printed circuit board 8 and a second printed circuit board 9 that are stacked. The first printed circuit board 8 is used to interface with the third flexible board 5, and the second printed circuit board The circuit board 9 is used to connect the first flexible board 3 and the second flexible board 4. For details, refer to the left side view of the printed circuit board interface 20 shown in FIG. 12, which corresponds to the first board-to-board connector 7 in the optical device 10, and a second board-to-board is formed on the first printed circuit board 8. The connector 81, when the printed circuit board interface 20 is docked with the optical device 10, the second board-to-board connector 81 is electrically connected to the first board-to-board connector 7; and the second printed circuit board 9 has a first The connection surface a and the second connection surface b, wherein a first connection circuit is formed on the first connection surface a, and the first connection surface a is used to connect the first flexible board 3 so that the first connection circuit and the first radio frequency circuit Electrical connection; a second connection circuit is formed on the second connection surface b, and the second connection surface b is used to connect the second flexible board 4 to electrically connect the second connection circuit and the second radio frequency circuit. In addition, as shown in Fig. 12, ground points 91 are formed on the first connection surface a and the second connection surface b of the second printed circuit board 9, respectively.

It should be noted that in the structural design of the optical device 10, the tolerances and the tolerances of each flexible circuit board need to be strictly controlled to adapt to the engineering architecture design of the optical module 100. In addition, in order to facilitate the heat dissipation of the structure, a thermally conductive gel may be provided between the gap between the optical device 10 and the printed circuit board interface 20.

Obviously, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims

An optical device, characterized by comprising: a light transmitting component, a light receiving component, a first flexible board, a second flexible board, and a third flexible board;

The light transmitting component and the light receiving component are stacked and arranged;

The first flexible board is provided with a first radio frequency circuit electrically connected to the light transmitting component, and the second flexible board is provided with a second radio frequency circuit electrically connected to the light receiving component;

The third flexible board includes a first connecting portion, a second connecting portion, and an extension portion. The first connecting portion is provided with a first DC circuit, and the second connecting portion is provided with a second DC circuit. The first connecting portion is bent relative to the second connecting portion, so that the first direct current circuit is electrically connected to the light transmitting component, and the second direct current circuit is electrically connected to the light receiving component;

The extension portion is provided with a first board-to-board connector electrically connected with the first DC circuit and the second DC circuit, and the first board-to-board connector is used for electrically connecting with an external circuit board.
The optical device according to claim 1, wherein the head end of the optical transmitting assembly is opposite to the head end of the optical receiving assembly, and the tail end of the optical transmitting assembly is opposite to the tail end of the optical receiving assembly. relatively;

The first flexible board is connected to the tail end of the light transmitting component, and the second flexible board is connected to the tail end of the light receiving component.
3. The optical device according to claim 2, wherein the rear end of the optical transmitting assembly is provided with a first connecting protrusion, and the thickness of the first connecting protrusion is smaller than the thickness of the optical transmitting assembly; The rear end of the light receiving component is provided with a second connecting protrusion, the thickness of the second connecting protrusion is smaller than the thickness of the light receiving component;

A accommodating space for connecting the printed circuit board of the optical module is formed between the first connecting protrusion and the second connecting protrusion.
The optical device according to claim 3, wherein the first flexible board is connected to a side of the first connecting protrusion facing the second connecting protrusion, and the second flexible board is connected to the second connecting protrusion. The second connecting protrusion faces one side of the first connecting protrusion.
The optical device according to claim 3, wherein the first connecting portion is connected to a side of the first connecting protrusion away from the second connecting protrusion, and the second connecting portion is connected to the A side of the second connecting protrusion away from the first connecting protrusion.
The optical device according to claim 5, wherein the first connecting portion does not protrude from the surface of the light transmitting component away from the light receiving component, and the second connecting portion does not protrude from the light receiving component. The component faces away from the surface of the optical transmitting component.
7. The optical device according to any one of claims 2-6, wherein the head end of the optical transmitting component is provided with a first optical port, and the head end of the optical receiving component is provided with a second optical port;

The first optical port and the second optical port are arranged side by side.
7. The optical device according to any one of claims 1-7, wherein the first board-to-board connector corresponds to the first connecting portion.
An optical module, characterized by comprising a printed circuit board interface and the optical device according to any one of claims 1-8, the printed circuit board interface comprising a first printed circuit board and The second printed circuit board;

A second board-to-board connector is formed on the first printed circuit board, and the second board-to-board connector is electrically connected to the first board-to-board connector;

The second printed circuit board has a first connection surface and a second connection surface opposite to each other, a first connection circuit is formed on the first connection surface, and a second connection circuit is formed on the second connection surface; The first connection surface is used to connect the first flexible board to electrically connect the first connection circuit and the first radio frequency circuit, and the second connection surface is used to connect the second flexible board to the The second connection circuit is electrically connected to the second radio frequency circuit.
9. The optical module of claim 9, wherein the first connection surface and the second connection surface are respectively formed with grounding points.