Optical device and optical communication apparatus

Abstract

The utility model provides an optical device and optical communication equipment, and belongs to the technical field of optical communication. The optical device comprises a refrigerator, a base, a laser and a shielding cover, the refrigerator, the base and the laser are located in the shielding cover, the refrigerator is fixed on the base, a heating surface of the refrigerator is in contact with the base, the laser is fixed on the refrigerator and is in contact with a heat absorption surface of the refrigerator, and the base is attached to the shielding cover. By adopting the optical device disclosed by the invention, the heat dissipation of the refrigerator can be realized without adding an additional hardware structure.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technology, and in particular to an optical device and an optical communication equipment. Background Art

[0002] In a passive optical network (PON), optical devices usually adopt a transistor outline (TO) packaging format, i.e., a bidirectional optical subassembly (BOSA). In an optical network unit (ONU), in order to reduce costs, BOSA is mounted on a single board. In gigabit-capable PON (GPON) and 10G PON, BOSA is mounted on a single board in the ONU, which can work normally. However, with the evolution of technology, 50G PON has emerged. The transmission wavelength accuracy requirements of ONU are relatively high, and the laser in BOSA needs to be cooled, i.e., a cooler is set for the laser to stably control the working temperature of the laser. However, the existence of the cooler will make the overall power consumption higher, and the optical device needs to be cooled.

[0003] At present, in order to solve the heat dissipation problem, a heat dissipation block is added around the TO base, and the heat dissipation block is assembled with the peripheral structure to achieve heat dissipation. For example, two semicircular heat dissipation blocks are added to the outside of the TO base, and the heat dissipation blocks are assembled with the peripheral structure to achieve heat dissipation. In this way, additional hardware structures need to be added to achieve heat dissipation. Utility Model Content

[0004] The present disclosure provides an optical device and an optical communication device, which can dissipate heat from a laser without adding additional hardware structures.

[0005] In a first aspect, the present disclosure provides an optical device, which includes a refrigerator, a base, a laser and a shielding cover, wherein the refrigerator, the base and the laser are all located in the shielding cover, the refrigerator is fixed on the base, and the heating surface of the refrigerator is in contact with the base, the laser is fixed on the refrigerator and in contact with the heat absorption surface of the refrigerator, and the base is in contact with the shielding cover.

[0006] In the solution shown in the present disclosure, a cooler is arranged in the optical device, the cooler is in contact with the base, and the base is fitted with the shielding cover, so that the heat released by the cooler can be transferred to the shielding cover through the base, and the heat is dissipated through the shielding cover without adding additional hardware structure.

[0007] In an optional manner, the optical device further includes a heat-conducting medium, and the heat-conducting medium is located between the base and the shielding cover.

[0008] In the solution shown in the present disclosure, a heat-conducting medium is arranged between the base and the shielding cover, so that the heat-conducting performance between the base and the shielding cover is better, thereby making it easier to dissipate heat.

[0009] In an optional manner, the surface of the base opposite to the optical port of the optical device has a first boss, the refrigerator is located on the first boss, and the heat generating surface of the refrigerator contacts the first boss. In this way, the refrigerator is placed using the boss structure.

[0010] In an optional manner, the surface of the base facing the first cover wall of the shielding cover has a second boss, and the second boss is in contact with the first cover wall, and the first cover wall is the cover wall of the shielding cover except the cover wall facing the optical port of the optical device.

[0011] In the solution disclosed in the present invention, the base adopts a boss structure to fit with the first cover wall of the shielding cover, which can increase the fitting area between the base and the shielding cover, making it easier to dissipate heat. Moreover, since the first cover wall is the cover wall of the shielding cover except the cover wall facing the optical port of the optical device, it will not affect the optical device from transmitting and receiving light signals.

[0012] In an optional manner, the optical device further comprises a sealing cover having a light window, the sealing cover is covered on the base, and the refrigerator and the laser are located in the sealing cover, and the output light path of the laser is opposite to the position of the light window.

[0013] In the solution shown in the present disclosure, the optical device also includes a sealing cover for sealing the refrigerator and the laser to minimize the impact of dust on the refrigerator and the laser.

[0014] In an optional manner, the sealing cover is a tubular sealing cover, the surface of the base facing the opening of the shielding cover is cylindrical, the axial direction is consistent with the axial direction of the tubular sealing cover, and the tube wall of the tubular sealing cover fits the cylinder.

[0015] In the solution shown in the present disclosure, the sealing cover is a tubular sealing cover, and a part of the base is also cylindrical, so that the sealing cover can more easily seal the refrigerator and the laser.

[0016] In an optional manner, the base has a chamber, and the side wall of the base facing the light output port of the optical device has a light window, and the light window is located on the output light path of the laser. The refrigerator is fixed in the chamber, and the heating surface of the refrigerator is in contact with the inner surface of the chamber, and the outer surface of the chamber is in contact with the second cover arm of the shielding cover, and the second cover wall is the cover wall of the shielding cover except the cover wall facing the light port of the optical device.

[0017] In the solution shown in the present disclosure, the base is a chamber structure, and the refrigerator is fixed in the chamber. The heating surface of the refrigerator is in contact with the inner surface of the chamber, and the outer surface of the chamber is in contact with the second cover arm of the shielding cover. In this way, not only can the refrigerator and the laser be sealed, but also the refrigerator and the base can be in contact.

[0018] In an optional embodiment, the chamber is a square chamber, the refrigerator is fixed in the inner surface of the bottom plate in the square chamber close to the top wall of the shielding cover, and the heating surface of the refrigerator is in contact with the inner surface of the bottom plate, and the outer surface of the bottom plate is in contact with the top wall of the shielding cover. In the square chamber, the area of ​​the bottom plate is larger than the area of ​​the top plate opposite to the bottom plate.

[0019] In the solution shown in the present disclosure, the chamber is a square chamber, and the outer surface of the bottom plate of the square chamber is in contact with the bottom plate of the shielding cover. The area of ​​the bottom plate is larger than the area of ​​the top plate opposite to the bottom plate, so that the contact area with the top wall of the shielding cover is large, making it easier to dissipate heat.

[0020] In an optional manner, the optical window is a converging lens, so that the optical signal is converged, making it easier to transmit the optical signal over a long distance.

[0021] In an optional manner, the optical device further includes a receiving component and a spectroscope, the receiving component is located on the reflection output light path of the spectroscope, the laser is located on the transmission input light path of the spectroscope, and the receiving component and the spectroscope are fixed in the shielding cover.

[0022] In the solution shown in the present disclosure, the optical device is an integrated transceiver, and the separation of the transmitted signal and the received signal is achieved through the spectroscope.

[0023] In an optional manner, the optical device further includes a frame, a fixing structure and a single board, the base, the receiving assembly and the spectroscope are all fixed to the frame, and the frame is connected to the single board via the fixing structure.

[0024] In a second aspect, the present disclosure provides an optical communication device, comprising the optical device as described in the first aspect and any optional manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an optical device on board (BOSA on board, BOB) provided by an exemplary embodiment of the present disclosure;

[0026] Figure 2 is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure;

[0027] Figure 3is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure;

[0028] Figure 4 is a front view and a side view of a base provided by an exemplary embodiment of the present disclosure;

[0029] Figure 5 is another front view and side view of a base provided by an exemplary embodiment of the present disclosure;

[0030] Figure 6 is a structural schematic diagram of a base provided by an exemplary embodiment of the present disclosure;

[0031] Figure 7 is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure;

[0032] Figure 8 is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure;

[0033] Fig. 9 is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure;

[0034] Fig.10 is another front view and side view of a base provided by an exemplary embodiment of the present disclosure;

[0035] Fig.11 is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure;

[0036] Fig.12 It is another structural schematic diagram of an optical device on a board provided by an exemplary embodiment of the present disclosure.

[0037] Illustration

[0038] 1. Refrigerator; 2. Base; 3. Laser; 4. Shielding cover; 5. Sealing cover; 6. Heat transfer medium; 7. Receiving component; 8. Spectroscope; 9. Frame; 10. Fixed structure; 11. Single board;

[0039] 01. Light window; 21. First boss; 22. Second boss; 23. Metal terminal. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0041] In PON, optical devices are usually implemented in TO packaging, usually a single-channel transceiver structure, that is, BOSA devices. Generally speaking, optical line terminals (OLT) are presented in the form of optical modules, while in ONU and optical network terminals (ONT) (hereinafter, ONU is used as an example for explanation), in order to reduce costs, optical devices are directly assembled on a single board, that is, ONU is usually implemented in the form of optical devices on board.

[0042] The optical device on board method is widely used in GPON and 10G PON. When applied to 50G PON, the BOB method will inevitably be adopted. However, with the evolution of technology, different generations of network planning are different. In 50G PON, the transmission wavelength of the ONU may be determined to be 1286±2nm, and the wavelength accuracy requirement is relatively high. The current laser characteristics determine that cooling packaging is required in the optical devices of the ONU. For example, in the optical device, a cooler is set for the laser to stably control the operating temperature of the laser, but the existence of the cooler will make the overall power consumption higher, and the optical device needs to be cooled. At present, in order to solve the heat dissipation problem, a heat dissipation block is added around the base, and the heat dissipation block is assembled with the peripheral structure to achieve heat dissipation. In this way, additional hardware structures need to be added to achieve heat dissipation.

[0043] Based on this, an embodiment of the present disclosure provides an optical device in which a cooler contacts a base, and the base contacts a shielding cover, so that heat released by the cooler can be dissipated through the base and the shielding cover without adding additional hardware structures.

[0044] An optical device is provided in an embodiment of the present disclosure. The optical device is applied to an ONU or an ONT. The optical device is a single-channel transmitting optical device, or a single-channel transmitting and receiving integrated optical device, that is, there is a transmitting component and a receiving component.

[0045] In the disclosed embodiment, the optical device adopts the method of optical device on board, and the optical device includes a refrigerator 1, a base 2, a laser 3, a shielding cover 4, a frame 9, a fixing structure 10 and a single board 11. The refrigerator 1 is used to control the working temperature of the laser 3, the base 2 can be a TO base, the laser 3 is used to output optical signals, and is a laser chip, the shielding cover 4 is used for electromagnetic shielding, and the single board 11 is a printed circuit board (PCB). The refrigerator 1, the base 2 and the laser 3 are fixed in the shielding cover 4. The refrigerator 1 has a heat absorbing surface and a heat generating surface. The heat absorbing surface is used to absorb heat for cooling, and the heat generating surface is used to release heat for heat dissipation. The refrigerator 1 is fixed on the base 2, and the heating surface of the refrigerator 1 is in contact with the base 2. The laser 3 is fixed on the refrigerator 1 and in contact with the heat absorbing surface of the refrigerator 1. The base 2 is fitted with the shielding cover 4, and the shielding cover 4 is attached to the single board 11. The refrigerator 1 and the laser 3 are both connected to the single board 11, and the base 2 is fixed to the frame 9, and the frame 9 is connected to the single board 11 through the fixed structure 10. In this way, the refrigerator 1 absorbs the heat of the laser 3, so that the temperature of the laser 3 is constant, and the optical signal of the specified wavelength is output. The heat released by the refrigerator 1 is first transferred to the base 2, and the base 2 then transfers the heat to the shielding cover 4, thereby dissipating heat.

[0046] In an optional manner, the refrigerator 1 is adhered to the base 2 , and the laser 3 is adhered to the refrigerator 1 .

[0047] In an optional manner, the refrigerator 1 may be any type of refrigerator. For example, the refrigerator 1 is a thermal electric cooler (TEC).

[0048] In an optional manner, the base 2 is made of valveable metal material or stainless steel material.

[0049] In an optional manner, the shielding cover 4 is a metal cover.

[0050] In an optional manner, when the base 2 and the shielding cover 4 are attached, there may be a gap. In order to improve the heat conduction effect, the optical device further includes a heat conducting medium 6, which is located between the base 2 and the shielding cover 4 to fill the gap between the base 2 and the shielding cover 4. In this way, the heat conducting medium 6 makes the base 2 and the shielding cover 4 in close contact, so that the heat of the base 2 is more easily transferred to the shielding cover 4 for heat dissipation.

[0051] Optionally, the heat-conducting medium 6 is any medium that is easy to transfer heat, for example, the heat-conducting medium 6 is a heat-conducting glue or a heat-conducting pad.

[0052] In an optional manner, the base 2 adopts a boss structure, and the surface of the base 2 opposite to the optical port has a first boss 21, which can be understood as a flat plate, and the optical port is an optical port for the optical device to receive and receive optical signals. The refrigerator 1 is fixed on the first boss 21, and the heating surface of the refrigerator 1 contacts the first boss 21. The surface of the first cover wall of the base 2 facing the shielding cover 4 has a second boss 22, which can be understood as a flat plate, and the second boss 22 is in contact with the first cover wall, and the first cover wall is the cover wall of the shielding cover 4 except the cover wall facing the optical port of the optical device. In this way, the heating surface of the refrigerator 1 contacts the first boss 21, so that the heat is transferred to the first boss 21, the first boss 21 transfers the heat to the second boss 22, and the second boss 22 dissipates heat through the shielding cover 4.

[0053] When the base 2 adopts a boss structure, the schematic diagram of the structure of the optical device on the board is shown in FIG. Figures 1 to 3 , Figures 1 to 3 The optical devices shown in the figure all include a heat-conducting medium 6. Figure 1 In the embodiment, the first cover wall is the top wall of the shielding cover 4, the first boss 21 extends toward the light port, the second boss 22 extends in the opposite direction of the light port, the first boss 21 and the second boss 22 are located on opposite planes, and the second boss 22 is in contact with the top wall of the shielding cover 4. Figure 2 In the embodiment, the first cover wall is the side wall of the shielding cover 4, the first boss 21 extends toward the light port, the second boss 22 extends in the opposite direction of the light port, the first boss 21 and the second boss 22 are located on opposite planes, and the second boss 22 contacts the side wall of the shielding cover 4. Figure 3 In the embodiment, the first cover wall includes the top wall and the side wall of the shielding cover 4, the second boss 22 extends in the opposite direction to the first boss 21, and the second boss 22 contacts the top wall and the side wall. In addition, the first cover wall is the top wall of the shielding cover 4, the first boss 21 and the second boss 22 extend in directions perpendicular to each other, the first boss 21 extends in the direction of the light port, the second boss 22 extends in a direction perpendicular to the direction and is parallel to the top wall of the shielding cover 4, and the second boss 22 contacts the top wall of the shielding cover 4.

[0054] Optionally, when the base 2 adopts a boss structure, the cooler 1 and the laser 3 are sealed to prevent dust from entering the cooler 1 and the laser 3. Figures 1 to 3 The optical device shown in the structural diagram includes a sealing cover 5, which has an optical window 01, and the optical window 01 can transmit the incident optical signal. The sealing cover 5 is covered on the base 2, and the refrigerator 1 and the laser 3 are both located in the sealing cover 5. The output optical path of the laser 3 is opposite to the position of the optical window 01, so that the optical signal output by the laser 3 is output through the optical window 01.

[0055] Optionally, in order to enable the optical signal output by the laser 3 to be transmitted over a long distance, the optical window 01 is configured as a converging lens for converging the optical signal output by the laser 3 .

[0056] Optionally, the sealing cover 5 is a tubular sealing cover, the surface of the base 2 facing the opening of the shielding cover 4 is cylindrical, the axial direction is consistent with the axial direction of the tubular sealing cover, and the tube wall of the tubular sealing cover fits the cylinder, so that the shapes of one side of the two are consistent, making it easier for the sealing cover 5 to seal the refrigerator 1 and the laser 3. In the case where the sealing cover 5 is a tubular sealing cover, Figure 4 A side view and a front view of the base 2 are shown.

[0057] It should be noted that when the sealing cover 5 is a tubular sealing cover, the sealing cover 5 can be called a tube cap, and when the light window 01 is configured as a converging lens, the sealing cover 5 can also be called a lens tube cap.

[0058] Optionally, the surface of the base 2 facing the top wall of the shielding case 4 can be of any shape, but in order to increase the contact area with the shielding case 4 , the shape is the same as the shape of the top wall of the shielding case 4 .

[0059] Optionally, the second boss 22 is attached to the first cover wall through the heat conducting medium 6 .

[0060] Optionally, the first boss 21 has a step, the heat dissipation surface of the refrigerator 1 contacts a surface of the step parallel to the first boss 21 , and the side surface of the refrigerator 1 contacts a surface of the step perpendicular to the surface.

[0061] Optionally, Figure 5 The side view and the front view of the base 2 are shown, see Figure 5 The base 2 also includes a plurality of glass-encapsulated metal terminals 23. The number of the metal terminals 23 can be set according to actual needs. The metal terminals 23 are used to pass through wires that connect the single board 11 and are used to power the refrigerator 1 and the laser 3. For example, the base 2 includes four metal terminals 23, two of which are used to pass through wires that power the refrigerator 1, and the other two metal terminals 23 are used to pass through wires that power the laser 3. The positions of the plurality of metal terminals 23 on the base 2 can be set according to actual needs. Figure 5 Four metal terminals 23 are shown and are arranged on a straight line close to the first boss 21 .

[0062] In another alternative, see Figure 6, the base 2 adopts a chamber structure. The base 2 has a chamber, and the side wall of the base 2 facing the optical output port of the optical device has an optical window 01, and the optical window 01 is located on the output optical path of the laser 3, and the optical window 01 can transmit the optical signal output by the laser 3. The refrigerator 1 is fixed in the chamber, and the heating surface of the refrigerator 1 contacts the inner surface of the chamber. The outer surface of the chamber is in contact with the second cover wall of the shielding cover 4, and the second cover wall is the cover wall of the shielding cover 4 except the cover wall facing the optical port of the optical device. In this way, the heat is transferred to the shielding cover 4 through the chamber.

[0063] Optionally, when the base 2 adopts a chamber structure, the schematic diagram of the structure of the optical device on the board is shown in Figures 7 to 9 .exist Figure 7 In the embodiment, the chamber is a square chamber having a bottom plate near the opening of the shielding cover 4, the refrigerator 1 is fixed on the inner surface of the bottom plate, the heating surface of the refrigerator 1 contacts the inner surface of the bottom plate, and the outer surface of the bottom plate is attached to the top wall of the shielding cover 4 through the heat conducting medium 6. Figure 8 in Figure 7 On the basis of the base 2 shown in , the area of ​​the bottom plate is larger than the area of ​​the top plate opposite to the bottom plate. For example, the bottom plate has a boss extending in the opposite direction of the optical port of the optical device. In this way, the contact area between the base 2 and the shielding cover 4 can be increased, which is more conducive to heat dissipation. Fig. 9 in Figure 7 On the basis of the base 2 shown, the outer surface of the side wall of the base 2 is in contact with the side wall of the shielding cover 4 to increase the contact area with the shielding cover 4, which is more conducive to heat dissipation. Figure 8 The boss is a boss extending from the bottom plate in the opposite direction of the optical port of the optical device, or it may be a boss extending from the bottom plate in the first direction, where the first direction is perpendicular to the direction of the optical port and is parallel to the top wall of the shielding cover 4.

[0064] Optionally, Fig.10 Provides a front view and a side view of the base 2, see Fig.10 The base 2 also includes a plurality of glass-encapsulated metal terminals 23. The number of the metal terminals 23 can be set according to actual needs. The metal terminals 23 are used to pass through wires, which are used to power the refrigerator 1 and the laser 3. For example, the base 2 includes four metal terminals 23, two of which are used to pass through wires for powering the refrigerator 1, and the other two metal terminals 23 are used to pass through wires for powering the laser 3. The positions of the plurality of metal terminals 23 on the base 2 can be set according to actual needs. Fig.10 Four metal terminals 23 are shown in the figure and are arranged on a straight line close to the bottom plate, and the straight line is parallel to the bottom plate.

[0065] Optionally, in order to enable the optical signal output by the laser 3 to be transmitted over a long distance, the optical window 01 is configured as a converging lens for converging the optical signal output by the laser 3 .

[0066] It should be noted that in the above schematic diagram of the optical device on the board, the optical device also includes an optical fiber pigtail, and the optical fiber pigtail is fixed on the frame 9 through a port.

[0067] In an optional manner, the optical device may be a transceiver integrated optical device, and may be mounted on a board, which is an optical device on a board structure. Fig.11 and Fig.12 A schematic diagram of the structure of an optical device on a board is provided, and the optical device also includes a receiving component 7, a beam splitter 8, a frame 9, a fixing structure 10 and a single board 11. The receiving component 7 is located on the reflection output optical path of the beam splitter 8, the laser 3 is located on the transmission input optical path of the beam splitter 8, and the receiving component 7 and the beam splitter 8 are fixed in a shielding cover 4. The base 2, the receiving component 7 and the beam splitter 8 are all fixed to the frame 9, and the frame 9 is connected to the single board 11 through the fixing structure 10, so that the component for sending and receiving optical signals is fixed on the single board 11, realizing a bidirectional optical component on the board.

[0068] Among them, Fig.11 and Fig.12 In the figure, the beam splitter 8 is located on the input and output optical path of the port connected to the optical fiber pigtail, and the port is fixed on the frame 9. The process of the optical device sending the optical signal is: the laser 3 outputs the optical signal, which is incident on the beam splitter 8, the beam splitter 8 transmits the optical signal, enters the optical fiber pigtail, and the optical fiber pigtail transmits the optical signal. The process of the optical device receiving the optical signal is: the optical signal transmitted by the optical fiber pigtail is incident on the beam splitter 8, the beam splitter 8 reflects the light and outputs it to the receiving component 7, and the receiving component 7 receives the optical signal.

[0069] Optionally, the fixing structure 10 is a metal bracket, a solid structural member or fixing glue, etc.

[0070] In the embodiment of the disclosure, in the optical device with integrated transmission and reception, the refrigerator 1 is fitted with the shielding cover 4 without the need for an additional heat sink, so that the optical device is easy to implement, and the heat conduction path of the optical device is improved, reducing the requirements for the external heat dissipation structure.

[0071] The embodiment of the present disclosure further provides an optical communication device, which includes any optical device described above. The optical communication device can be an ONU or an ONT.

[0072] In the embodiment of the present disclosure, after the part for sending and receiving optical signals is completed, it is assembled with a single board and a shielding cover to realize an optical device with optical sending and receiving functions.

[0073] In the present disclosure, the words such as the term "first" and "second" are used to distinguish the same or similar items with substantially the same effects and functions. It should be understood that there is no logical or temporal dependency between "first" and "second", nor is the quantity and execution order limited. It should also be understood that although the following description uses the terms first, second, etc. to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of various examples, the first cover wall can be referred to as the second cover wall, and similarly, the second cover wall can be referred to as the first cover wall. The first cover wall and the second cover wall can both be cover walls, and in some cases, can be separate and different cover walls.

[0074] The above description is only an exemplary embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present disclosure, and these modifications or replacements should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An optical device, characterized in that: The optical device comprises a refrigerator (1), a base (2), a laser (3) and a shielding cover (4); The refrigerator (1), the base (2) and the laser (3) are all located in the shielding cover (4); The refrigerator (1) is fixed on the base (2), and the heating surface of the refrigerator (1) is in contact with the base (2); The laser (3) is fixed on the refrigerator (1) and is in contact with the heat absorption surface of the refrigerator (1); The base (2) is fitted with the shielding cover (4).

2. The optical device according to claim 1, characterized in that: The surface of the base (2) opposite to the optical port of the optical device has a first boss (21), the refrigerator (1) is located on the first boss (21), and the heat-generating surface of the refrigerator (1) is in contact with the first boss (21).

3. The optical device according to claim 2, characterized in that: The surface of the base (2) facing the first cover wall of the shielding cover (4) has a second boss (22), and the second boss (22) is in contact with the first cover wall. The first cover wall is the cover wall of the shielding cover (4) other than the cover wall facing the optical port of the optical device.

4. The optical device according to claim 2, characterized in that: The optical device further comprises a sealing cover (5), the sealing cover (5) having a light window (01), the sealing cover (5) covering the base (2), the refrigerator (1) and the laser (3) being located in the sealing cover (5), and the exit light path of the laser (3) being opposite to the position of the light window (01).

5. The optical device according to claim 4, characterized in that: The sealing cover (5) is a tubular sealing cover, and the surface of the base (2) facing the opening of the shielding cover (4) is cylindrical, and the axial direction is consistent with the axial direction of the tubular sealing cover; The tube wall of the tubular sealing cover is in contact with the cylindrical surface.

6. The optical device according to claim 1, characterized in that: The base (2) has a cavity, and a side wall of the base (2) facing the light output port of the optical device has a light window (01), and the light window (01) is located on the output light path of the laser (3); The refrigerator (1) is fixed in the chamber, and the heat-generating surface of the refrigerator (1) is in contact with the inner surface of the chamber; The outer surface of the chamber is in contact with the second cover arm of the shielding cover (4), and the second cover wall is the cover wall of the shielding cover (4) other than the cover wall facing the optical port of the optical device.

7. The optical device according to claim 6, characterized in that: The chamber is a square chamber, the refrigerator (1) is fixed in the inner surface of the bottom plate of the square chamber close to the top wall of the shielding cover (4), and the heating surface of the refrigerator (1) is in contact with the inner surface of the bottom plate; The outer surface of the bottom plate is in contact with the top wall of the shielding cover (4); In the square chamber, the area of ​​the bottom plate is larger than the area of ​​the top plate opposite to the bottom plate.

8. The optical device according to claim 6, characterized in that: The light window (01) is a converging lens.

9. The optical device according to any one of claims 1 to 8, characterized in that: The optical device also includes a heat conducting medium (6); The heat-conducting medium (6) is located between the base (2) and the shielding cover (4).

10. The optical device according to any one of claims 1 to 8, characterized in that: The optical device also includes a receiving component (7) and a beam splitter (8); The receiving component (7) is located on the reflection output light path of the beam splitter (8), and the laser (3) is located on the transmission input light path of the beam splitter (8); The receiving component (7) and the beam splitter (8) are fixed inside the shielding cover (4).

11. The optical device according to claim 10, characterized in that: The optical device also includes a frame (9), a fixing structure (10) and a single board (11); The base (2), the receiving assembly (7) and the beam splitter (8) are all fixed to the frame (9); The frame (9) is connected to the single board (11) via the fixing structure (10).

12. An optical communication device, characterized in that: Comprising the optical device according to any one of claims 1 to 11.

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