A compression-cooled fiber laser

Abstract

A compression refrigeration fiber laser comprises a shell, an optical part, a compression refrigeration device, and an optoelectronic interface part. The structure and relative position of the fiber laser and the compression refrigeration device in the laser shell are reasonably constructed so that the heat of the laser can be quickly taken out without destroying the stability of the laser.

Description

Technical Field

[0001] The invention relates to a compression refrigeration optical fiber laser, which utilizes compression refrigeration to control the temperature of a pump light source in a chassis. Background Art

[0002] During the use of high-power lasers, the refrigeration mechanism is very dependent. In the conventional laser cooling, water cooling mechanism is mostly used for cooling. The water cooling mechanism is large and the installation conditions are strict, which is not conducive to outdoor portable welding.

[0003] At present, some lasers also use air cooling mechanism for heat dissipation. Most of them directly use fans to dissipate heat from the heat source or the heat sink, such as CN212114287U. Since the optical equipment is relatively precise, the air duct directly flowing through the side of the optical equipment or its vicinity is likely to affect the optical equipment, causing some indicators to decline and affecting the reliability of the equipment. There are also air-cooled fiber lasers that use compression refrigeration in the prior art, such as CN103279149A, which discloses a structure that uses a compressor to cool and heat the laser to keep the temperature constant. The document CN203071389U discloses a small laser device that uses variable frequency compression refrigeration, but they all only use the simple principle of variable frequency compression, and do not optimize the structure according to the characteristics of the fiber laser and the principle of compression refrigeration. The structure of its refrigeration system is complex and unreasonable, and the heat removal capacity is poor, which affects the refrigeration capacity of the entire system, the output power is small, and the air duct isolation effect is poor, which affects the stability of the device. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a compression refrigeration fiber laser, which overcomes the deficiencies of the prior art and has a reasonable design.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The compression refrigeration fiber laser of the present invention comprises a laser body, which has a laser shell, in which the optical part of the fiber laser, a laser refrigeration device, a laser driving part and an optoelectronic interface part are arranged.

[0007] The optical part is used to emit fiber laser signals, and includes a pump laser unit, a gain fiber part, a temperature control plate, an optical part driving device, and preferably also includes an N+1 forward and reverse fiber combiner.

[0008] The pump laser unit is one or more semiconductor lasers. Preferably, the semiconductor laser is used to provide a 976 nm pump laser absorbed by the gain cavity within a certain temperature range.

[0009] The gain fiber portion is preferably an ytterbium-doped gain fiber and a first grating and a second grating located at two ends of the ytterbium-doped gain fiber.

[0010] The temperature control plate is a cold plate, the semiconductor laser and / or gain fiber part is mounted on the cold plate, the cold plate is a buried tube cold plate, and can be a single-sided buried (copper) tube cold plate or a double-sided buried (copper) tube cold plate (the cold plate acts as an evaporator in the refrigeration process).

[0011] The N+1 forward and reverse fiber combiner is used to couple the pump light emitted by the pump laser unit into the gain fiber part.

[0012] Preferably, the pump laser unit, gain fiber part, and N+1 forward and reverse fiber combiner of the optical part are all integrated and mounted on a cold plate of the temperature control plate. The cold plate is a planar plate structure with a cold plate refrigerant (copper) pipe buried inside.

[0013] The laser refrigeration device includes a (variable frequency) compressor, a condenser, a refrigerant pipeline, an expansion valve, and a (variable frequency) fan (it may also include an electromagnetic four-way reversing valve and a refrigerant storage tank). It is a phase-change variable frequency compression temperature control system used to provide temperature cooling with a large temperature difference for semiconductor lasers; wherein the cold plate refrigerant pipeline is connected to the refrigerant pipeline of the laser refrigeration device for the circulation and circulation of the refrigerant, the variable frequency compressor is connected to the condenser and the cold plate refrigerant pipeline through the refrigerant pipeline, and the refrigerant refrigerant is contained in the refrigerant pipeline and the cold plate refrigerant pipeline.

[0014] Preferably, the laser refrigeration device further comprises a drying filter, and the drying filter is arranged between the condenser and the thermal expansion valve.

[0015] Preferably, the condenser is an aluminum parallel flow heat exchanger.

[0016] The laser driving part is used to drive the laser cooling device and the optical part.

[0017] The optoelectronic interface part is used for the optoelectronic connection between the laser body and the outside, including the equipment power input port, safety lock interface, control signal input interface, output optical cable interface, etc.

[0018] The equipment power input interface is used for external power supply; the safety lock interface is used for safety interlock of the laser; the control signal input interface is used for input of external control signals.

[0019] The shell is an approximately rectangular shell, which is enclosed by a front cabinet board, a rear cabinet board, an upper cabinet board, a lower cabinet board, a left cabinet board and a right cabinet board.

[0020] The shell has an upper cabinet plate and a corresponding lower cabinet plate, and includes four side panels between the upper and lower cabinet plates, which are a first side panel (i.e., a left cabinet plate), a second side panel (i.e., a front cabinet plate), a third side panel (i.e., a right cabinet plate), and a fourth side panel (i.e., a rear cabinet plate) connected in sequence; the first side panel is opposite to the third side panel (i.e., the left cabinet plate and the right cabinet plate are opposite to each other), and the second side panel is opposite to the fourth side panel (i.e., the front cabinet plate and the rear cabinet plate are opposite to each other).

[0021] The area of ​​the first side plate is larger than that of the second side plate, and the area of ​​the first side plate is larger than that of the fourth side plate; the area of ​​the third side plate is larger than that of the second side plate, and the area of ​​the third side plate is larger than that of the fourth side plate.

[0022] The upper cabinet plate and the lower cabinet plate are respectively provided with a first ventilation hole and a second ventilation hole, and a flow channel for air from bottom to top is formed between the two ventilation holes. Preferably, a first fan group is installed on the lower side of the upper cabinet plate, and a second fan group is installed on the upper side of the lower cabinet plate. Optionally, only the first fan group of the upper cabinet plate or the second fan group of the lower cabinet plate may be installed. Since air usually tends to rise after being heated, in order to prevent airflow turbulence and accelerate the outflow of heat, the rotation direction of the fan is set to accelerate the air to flow in from the ventilation holes at the bottom of the laser housing and then flow out from the ventilation holes at the top of the laser housing.

[0023] The cold plate is a planar plate structure having four lateral sides and a first cold plate surface on which the semiconductor laser is mounted and a second cold plate surface opposite thereto. The cold plate is vertically mounted on one side of the interior of the laser housing.

[0024] The shell has an internal space between the upper cabinet plate and the lower cabinet plate (ie, the space surrounded by the six panels of the shell), and the internal space is divided into a first internal space close to the first side plate and a second internal space close to the third side plate.

[0025] The first ventilation hole is located at a portion of the upper cabinet plate corresponding to the second internal space, and the second ventilation hole is located at a portion of the lower cabinet plate corresponding to the second internal space.

[0026] The optical part of the cold plate is installed in the first internal space, the cold plate is basically parallel to the first side plate (i.e., the left cabinet plate), the first cold plate surface of the cold plate faces the inner side of the first side plate (i.e., the left cabinet plate) of the shell, the second cold plate surface of the cold plate faces the third side plate of the shell, and the second cold plate surface of the cold plate serves as a dividing interface between the first internal space and the second internal space.

[0027] The four lateral sides of the cold plate are respectively in contact with the upper cabinet plate, the lower cabinet plate, the second side plate, and the fourth side plate of the housing. The cold plate and the housing jointly enclose a sealable first internal space. The second cold plate surface of the cold plate forms a complete partition surface between the first internal space and the second internal space, completely separating the first internal space and the second internal space, so that the air flowing between the first ventilation hole and the second ventilation hole does not pass through the first internal space, preventing the influence on the optical part.

[0028] On the side of the cold plate facing the second space (the second cold plate surface), preferably, a cold plate heat dissipation fin convex structure can be arranged. Preferably, the cold plate heat dissipation fin convex structure is a plurality of fin convexes extending along the vertical direction, and vertical grooves extending along the vertical direction are formed between the plurality of fin convexes.

[0029] The laser refrigeration device is installed in the second internal space, that is, devices such as a compressor, a condenser, a refrigerant pipeline, an expansion valve, and a fan (in some embodiments, an electromagnetic four-way reversing valve and a refrigerant liquid storage tank are also included) are located in the second internal space; among them, the condenser is located on the upper side of the second internal space (convenient for taking away heat), and the condenser includes a condensing fin device buried with a refrigerant pipeline, and the condensing fin device is located between the compressor device and the first ventilation hole.

[0030] The condensing fin device is installed on the lower side of the first ventilation hole of the upper cabinet plate. The condensing fin device has a plurality of gaps between the fins, and the plurality of gaps form an air duct from bottom to top, so that the air circulation channel is not blocked by the condensing fin device.

[0031] The first ventilation hole is located on the upper side of the second internal space, and the second ventilation hole is located on the lower side of the second internal space.

[0032] Preferably, the first fan group is located on the lower side of the condensing fin group and the upper side of the compressor, that is, between the condensing fin group and the compressor; of course, the first fan group can also be located on the lower side of the first ventilation hole and the upper side of the condensing fin group, that is, between the first ventilation hole and the condensing device, so that the air flow in the channel is more stable.

[0033] Preferably, the second fan group is located between the compressor and the second ventilation hole.

[0034] The second side plate of the housing has an optoelectronic interface installation area close to the first side plate and a heat dissipation surface area close to the third side plate; the optoelectronic interface installation area is used to install at least part or all of the interfaces of the optoelectronic interface part.

[0035] The optoelectronic interface installation area of ​​the second side panel corresponds to the side of the first internal space. Since the first internal space has optical components such as a pump light source and a gain optical fiber, the optoelectronic interface is installed in the optoelectronic interface installation area close to the first side panel. This can directly connect the optical device located in the first internal space and avoid the long and complex internal optoelectronic wiring.

[0036] The heat dissipation surface area of ​​the second side plate corresponds to the side of the second internal space. Since a refrigeration device is installed in the second internal space and an air cooling channel is formed, a surface structure for enhancing heat dissipation is provided in the heat dissipation surface area of ​​the second side plate to enhance the heat dissipation of the device. The heat dissipation surface area is provided with a plurality of heat dissipation protrusions. Preferably, the heat dissipation protrusions can be provided on the side of the heat dissipation surface area facing the outside of the housing and / or on the side facing the inside of the housing.

[0037] Likewise, preferably, the fourth side plate of the shell may also be configured in the same manner as the second side plate.

[0038] The fourth side plate has an optoelectronic interface installation area close to the first side plate and a heat dissipation surface area close to the third side plate; the optoelectronic interface installation area is used to install at least part or all of the interfaces of the optoelectronic interface part.

[0039] The optoelectronic interface installation area of ​​the fourth side panel corresponds to the side of the first internal space. Since the first internal space has optical components such as a pump light source and a gain optical fiber, the optoelectronic interface is installed in the optoelectronic interface installation area close to the first side panel. This can directly connect the optical device located in the first internal space and avoid long and complex internal optoelectronic wiring.

[0040] The heat dissipation surface area of ​​the fourth side plate corresponds to the side of the second internal space. Since a refrigeration device is installed in the second internal space and an air cooling channel is formed, a surface structure for enhancing heat dissipation is provided in the heat dissipation surface area of ​​the fourth side plate to enhance the heat dissipation of the device. The heat dissipation surface area is provided with a plurality of heat dissipation protrusions. Preferably, the heat dissipation protrusions can be provided on the side of the heat dissipation surface area facing the outside of the shell and / or on the side facing the inside of the shell.

[0041] In some embodiments, the surface of the third side plate of the housing facing outside the housing and / or the surface facing inside the housing has a protruding structure for enhancing heat dissipation.

[0042] Preferably, the size of the cabinet is 650mm×300mm×570mm. Preferably, a universal wheel is installed at each of the four corners of the lower cabinet plate of the cabinet. The housing is made of an aluminum profile structure, which is convenient for assembly, disassembly and maintenance, and saves cabinet space while ensuring heat dissipation. Preferably, the compression cooling fiber laser is used for a portable handheld fiber welding machine.

[0043] The present invention provides a compression refrigeration optical fiber laser, which reasonably constructs the structure of the optical fiber laser and the compression refrigeration device, so that the heat of the laser can be quickly taken out without destroying the stability of the laser.

[0044] By integrating the pump light source, beam combiner, and gain fiber of the fiber laser onto the cold plate, the laser is more integrated and convenient to cool. The pump laser is distributed on a large cold plate, and the heat transfer is faster. The cold plate is installed laterally on the side of the laser housing, and the refrigeration device is installed on the other side of the housing. The refrigerant in the pipe in the buried cold plate quickly takes away the heat, and then the heat is brought to the condenser through the action of the compressor. By constructing an air duct from bottom to top, the air rises naturally when heated, and the fan is set to accelerate the wind to blow out from bottom to top, promoting the heat to be taken out by the wind blown by the fan. The first internal space where the optical part is installed and the second internal space for cooling are separated by the cold plate, and the optical device space and the heat dissipation space are divided, so that the condensing device can quickly dissipate heat. At the same time, it will not affect the laser; at the same time, the wind flows through the second cold plate surface of the cold plate, and the second cold plate surface of the cold plate can also dissipate heat, which also increases the surface area of ​​heat dissipation; that is, under the same air duct, the heat conduction and heat dissipation structure of the refrigerant and the heat dissipation area on the second cold plate surface are simultaneously taken away by the same high-speed airflow, and the double high-efficiency heat dissipation (the condensation fin group on the forward path of the air duct and the heat conduction and heat dissipation of the second cold plate surface on the side of the air duct) does not complicate the layout inside the chassis (an entire large-volume air duct is more efficient and has less noise than multiple separate air ducts); at the same time, the interface installation area and the heat dissipation area are divided on the second side or the fourth side of the shell, which increases the heat dissipation capacity of the shell and makes the optoelectronic connection more direct, reducing the complexity of the optoelectronic connection and possible optical attenuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings required for describing the prior art are briefly introduced below.

[0046] Figure 1 is a schematic diagram of a laser of the present invention;

[0047] Figure 2 is a schematic diagram of the layout inside the shell observed from the outside of the shell toward the fourth side plate (or the second side plate);

[0048] Figure 3 It is a schematic diagram of the laser air duct of the present invention;

[0049] Figure 4 is a schematic diagram of the second side panel (or fourth side panel) of the present invention;

[0050] Figure 5 yes Figure 2 Enlarged schematic diagram of the intercooler plate;

[0051] Figure 6 yes Figure 2 Schematic diagram of the refrigerant pipeline connection method in FIG.

[0052] Figure 7 It is a schematic diagram of the layout observed from the upper side (or lower side) of the shell.

[0053] Figure 8 is a schematic diagram of the heat dissipation structure of the second cold plate surface of the cold plate; DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0055] like Figure 1 As shown, the compression refrigeration fiber laser of the present invention comprises a laser body, the laser body has a laser housing, and the housing is provided with an optical part of the fiber laser, a laser refrigeration device, a laser driving part and an optoelectronic interface part.

[0056] The optical part is used to emit a fiber laser signal, and includes a pump laser unit 101, a gain fiber part 102, a temperature control plate 103, an optical part driving device, and in some embodiments, also includes an N+1 forward and reverse fiber combiner.

[0057] The pump laser unit 101 is one or more semiconductor lasers. In some embodiments, the semiconductor laser is used to provide a 976 nm pump laser absorbed by the gain cavity within a certain temperature range.

[0058] In some embodiments, the gain fiber portion 102 is an ytterbium-doped gain fiber and a first grating and a second grating located at two ends of the ytterbium-doped gain fiber.

[0059] The temperature control plate 103 is a cold plate, and the semiconductor laser is mounted on the cold plate. The cold plate is a buried tube cold plate, which can be a single-sided buried (copper) tube cold plate or a double-sided buried (copper) tube cold plate (the cold plate acts as an evaporator during the refrigeration process).

[0060] The N+1 forward and reverse fiber combiner is used to couple the pump light emitted by the pump laser unit into the gain fiber.

[0061] In some embodiments, the pump laser unit 101, the gain fiber part 102, and the N+1 forward and reverse fiber combiner of the optical part are all integrated and mounted on a cold plate of the temperature control plate 103. The cold plate is a flat plate structure with a cold plate refrigerant (copper) pipe buried inside.

[0062] The laser refrigeration device includes a (variable frequency) compressor, a condenser, a refrigerant pipeline, an expansion valve, and a (variable frequency) fan (it may also include an electromagnetic four-way reversing valve and a refrigerant storage tank). It is a phase-change variable frequency compression temperature control system used to provide temperature cooling with a large temperature difference for the semiconductor laser; wherein the cold plate refrigerant pipeline 1031 is connected to the refrigerant pipeline of the laser refrigeration device for the circulation and circulation of the refrigerant, the variable frequency compressor is connected to the condenser and the cold plate refrigerant pipeline 1031 through the refrigerant pipeline, and the refrigerant refrigerant is contained in the refrigerant pipeline and the cold plate refrigerant pipeline 1031.

[0063] In some embodiments, the laser refrigeration device further includes a drying filter, and the drying filter is arranged between the condenser and the thermal expansion valve.

[0064] In some embodiments, the condenser is an aluminum parallel flow heat exchanger.

[0065] The laser driving part is used to drive the laser cooling device and the optical part;

[0066] The optoelectronic interface part is used for the optoelectronic connection between the laser body and the outside, including the equipment power input port 4, the safety lock interface 5, the control signal input interface 6, the output optical cable interface 7, etc.

[0067] The power input port of the device is used for external power supply; the safety lock interface 5 is used for safety interlock of the laser; and the control signal input interface 6 is used for input of external control signals.

[0068] See attached Figure 1 The shell is an approximately rectangular shell, which is surrounded by a front cabinet board, a rear cabinet board, an upper cabinet board, a lower cabinet board, a left cabinet board and a right cabinet board.

[0069] The shell has an upper cabinet panel 1011 and a corresponding lower cabinet panel 1012, and four side panels are included between the upper and lower cabinet panels, namely a first side panel 1013 (i.e., a left cabinet panel), a second side panel 1014 (i.e., a front cabinet panel), a third side panel 1015 (i.e., a right cabinet panel), and a fourth side panel 1016 (i.e., a rear cabinet panel) which are connected in sequence; the first side panel 1013 is opposite to the third side panel 1015 (i.e., the left cabinet panel and the right cabinet panel are opposite to each other), and the second side panel 1014 is opposite to the fourth side panel 1016 (i.e., the front cabinet panel and the rear cabinet panel are opposite to each other).

[0070] The area of ​​the first side plate is larger than that of the second side plate, and the area of ​​the first side plate is larger than that of the fourth side plate; the area of ​​the third side plate is larger than that of the second side plate, and the area of ​​the third side plate is larger than that of the fourth side plate.

[0071] The upper cabinet plate 1011 and the lower cabinet plate 1012 are respectively provided with a first ventilation hole and a second ventilation hole, and a flow channel for air from bottom to top is formed between the two ventilation holes. In some embodiments, a first fan group is installed on the lower side of the upper cabinet plate 1011, and a second fan group is installed on the upper side of the lower cabinet plate 1012. Optionally, only the first fan group of the upper cabinet plate or the second fan group of the lower cabinet plate may be provided. Since air usually tends to rise after being heated, in order to prevent airflow turbulence and accelerate the outflow of heat, see Figure 3 The rotation direction of the fan is set to accelerate the air to flow in from the ventilation holes at the bottom of the laser housing and then flow out from the ventilation holes at the top of the laser housing.

[0072] The cold plate is a planar plate structure having four surrounding sides and a first cold plate surface on which the semiconductor laser is mounted and a second cold plate surface opposite thereto. The cold plate is vertically mounted on one side of the interior of the laser housing.

[0073] See also Figure 2 The shell has an internal space (i.e., the space surrounded by the six cabinet panels of the shell) between the upper cabinet panel 1011 and the lower cabinet panel 1012. The internal space is divided into a first internal space close to the first side panel 1013 and a second internal space close to the third side panel.

[0074] The first ventilation hole is located at a portion of the upper cabinet plate corresponding to the second internal space, and the second ventilation hole is located at a portion of the lower cabinet plate corresponding to the second internal space.

[0075] The optical part of the cold plate is installed in the first internal space, the cold plate is basically parallel to the first side plate (i.e., the left cabinet plate), the first cold plate surface of the cold plate faces the inner side of the first side plate (i.e., the left cabinet plate) of the shell, the second cold plate surface of the cold plate faces the third side plate of the shell, and the second cold plate surface of the cold plate serves as a dividing interface between the first internal space and the second internal space.

[0076] The four lateral sides of the cold plate are in contact with the upper cabinet plate, the lower cabinet plate, the second side plate and the fourth side plate of the shell respectively, and the cold plate and the shell (that is, the first side plate and the parts of the upper cabinet plate, the lower cabinet plate, the second side plate and the fourth side plate) together enclose a sealable first internal space, and the second cold plate surface of the cold plate forms a complete dividing surface between the first internal space and the second internal space, which completely separates the first internal space and the second internal space, and divides two relatively independent spaces, so that the air flowing between the first ventilation hole and the second ventilation hole will not pass through the first internal space, so as to prevent affecting the optical part.

[0077] The wind flows through the second cold plate surface of the cold plate, and the second cold plate surface of the cold plate can also dissipate heat, thereby increasing the surface area for heat dissipation.

[0078] A cold plate heat dissipation fin protrusion structure can preferably be arranged on the side of the cold plate facing the second space (the second cold plate surface), so that the heat of the cold plate can be removed more efficiently by high-speed wind flow in addition to being removed by the refrigerant. Preferably, the cold plate heat dissipation fin protrusion structure is a plurality of fin protrusions extending in the vertical direction, and vertical grooves extending in the vertical direction are formed between the plurality of fin protrusions, and high-speed wind flow can pass through the vertical grooves to increase the heat dissipation efficiency of air cooling.

[0079] The cold plate and the cold plate heat dissipation fin protrusion structure are preferably an integrated structure. Preferably, the cold plate and / or the cold plate heat dissipation fin protrusion structure are made of a high thermal conductivity material.

[0080] The laser refrigeration device is installed in the second internal space, that is, the compressor, condenser, refrigerant pipeline, expansion valve, fan (in some embodiments, also including electromagnetic four-way reversing valve, refrigerant storage tank) and other devices are located in the second internal space; wherein the condenser is located on the upper side of the second internal space, the condenser includes a condensing fin device in which the refrigerant pipeline is buried, and the condensing fin device is located between the compressor device and the first ventilation hole.

[0081] The condensing fin device is installed on the lower side of the first ventilation hole of the upper cabinet plate 1011. The condensing fin device has multiple gaps between the fins, and the multiple gaps constitute an air duct from bottom to top so that the air circulation channel is not blocked by the condensing fin device.

[0082] In some embodiments, the volume of the second interior space is greater than the volume of the first interior space.

[0083] The first ventilation hole is located at the upper side of the second inner space, and the second ventilation hole is located at the lower side of the second inner space.

[0084] In some embodiments, the first fan group is located at the lower side of the condensing fin group and the upper side of the compressor, that is, between the condensing fin group and the compressor. Of course, the first fan group can also be located at the lower side of the first ventilation hole and the upper side of the condensing fin group, that is, between the first ventilation hole and the condensing device, which can make the airflow in the channel more stable.

[0085] In some embodiments, the second fan assembly is located between the compressor and the second vent.

[0086] See also Figure 4 : The second side plate 1014 of the shell has an optoelectronic interface installation area close to the first side plate and a heat dissipation surface area close to the third side plate; the optoelectronic interface installation area is used to install at least part or all of the interfaces of the optoelectronic interface part.

[0087] The optoelectronic interface installation area of ​​the second side panel corresponds to the side surface of the first internal space. Since the first internal space has optical components such as a pump light source and a gain optical fiber, the optoelectronic interface is installed in the optoelectronic interface installation area close to the first side panel. This can directly connect the optical device located in the first internal space and avoid long and complex internal optoelectronic wiring.

[0088] The heat dissipation surface area of ​​the second side plate corresponds to the side surface of the second internal space. Since a refrigeration device is installed in the second internal space and an air cooling channel is formed, a surface structure for enhancing heat dissipation is provided on the heat dissipation surface area of ​​the second side plate to enhance the heat dissipation of the device. Figure 4 The heat dissipation surface area is provided with a plurality of heat dissipation protrusions. In some embodiments, the heat dissipation protrusions may be provided on a side of the heat dissipation surface area facing outside the housing and / or on a side facing inside the housing.

[0089] Likewise, in some embodiments, the fourth side plate 1016 of the shell may also be configured similarly to the second side plate 1014 .

[0090] For example, the fourth side panel 1016 has an optoelectronic interface installation area close to the first side panel and a heat dissipation surface area close to the third side panel; the optoelectronic interface installation area is used to install at least part or all of the interfaces of the optoelectronic interface part.

[0091] The optoelectronic interface installation area of ​​the fourth side panel corresponds to the side surface of the first internal space. Since the first internal space has optical components such as a pump light source and a gain optical fiber, the optoelectronic interface is installed in the optoelectronic interface installation area close to the first side panel. This can directly connect the optical device located in the first internal space and avoid long and complex internal optoelectronic wiring.

[0092] The heat dissipation surface area of ​​the fourth side plate corresponds to the side surface of the second internal space. Since a refrigeration device is installed in the second internal space and an air cooling channel is formed, a surface structure for enhancing heat dissipation is provided in the heat dissipation surface area of ​​the fourth side plate to enhance the heat dissipation of the device. The heat dissipation surface area is provided with a plurality of heat dissipation protrusions. In some embodiments, the heat dissipation protrusions can be provided on the side of the heat dissipation surface area facing the outside of the housing and / or on the side facing the inside of the housing.

[0093] In some embodiments, the surface of the third side plate of the housing facing outside the housing and / or the surface facing inside the housing has a protruding structure for enhancing heat dissipation.

[0094] In a preferred embodiment, the dimensions of the cabinet are 650 mm×300 mm×570 mm.

[0095] In a preferred embodiment, a universal wheel is installed at each of the four corners of the lower cabinet plate of the cabinet. The housing is made of aluminum profile, which is convenient for assembly, disassembly and maintenance, and saves cabinet space while ensuring heat dissipation.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compression refrigeration fiber laser, comprising a housing, in which an optical part of the fiber laser and a laser refrigeration device are arranged; the optical part comprises a cold plate and a pump laser and a gain fiber part mounted on the cold plate; the laser refrigeration device comprises a compressor, a condenser, a refrigerant pipeline, an expansion valve, and a fan; It is characterized in that The shell has a first internal space and a second internal space, the optical part is located in the first internal space, and the laser refrigeration device is located in the second internal space; the cold plate includes a cold plate refrigerant pipeline, the cold plate refrigerant pipeline is connected to the refrigerant pipeline of the laser refrigeration device, and is used for the circulation and circulation of the refrigerant; the cold plate is a plate-like structure, which has a first cold plate surface on which the semiconductor laser is installed and a second cold plate surface opposite thereto, the cold plate is vertically installed on one side of the interior of the laser shell, and the second cold plate surface of the cold plate serves as the boundary between the first internal space and the second internal space; the shell has an upper cabinet plate and a corresponding lower cabinet plate, and there are four side panels between the upper and lower cabinet plates, which are a first side panel, a second side panel, a third side panel, and a fourth side panel connected in sequence; the first side panel is opposite to the third side panel, the second side panel is opposite to the fourth side panel, and the shell encloses an internal space , the internal space is divided into a first internal space close to the first side plate and a second internal space close to the third side plate; the first cold plate surface of the cold plate faces the inner side of the first side plate of the shell, and the second cold plate surface of the cold plate faces the third side plate of the shell; the shell is provided with a first ventilation hole and a second ventilation hole, and an air circulation channel is formed between the two ventilation holes; the second cold plate surface of the cold plate forms a dividing surface between the first internal space and the second internal space, so that the air flowing between the first ventilation hole and the second ventilation hole does not pass through the first internal space; the upper cabinet plate of the shell is provided with a first ventilation hole, and the lower cabinet plate of the shell is provided with a second ventilation hole, the first ventilation hole is located in the part of the upper cabinet plate corresponding to the second internal space, and the second ventilation hole is located in the part of the lower cabinet plate corresponding to the second internal space; an air circulation channel from bottom to top is formed between the two ventilation holes, and a fan is installed on the lower side of the upper cabinet plate; The cold plate is a planar plate-shaped structure; a cold plate heat dissipation fin protrusion structure is arranged on the side of the cold plate facing the second space; The cold plate and the cold plate heat dissipation fin protrusion structure are made of heat-conducting materials; the rotation direction of the fan is set to accelerate the air to flow in from the ventilation holes at the bottom of the laser housing and then flow out from the ventilation holes at the top of the laser housing; the cold plate heat dissipation fin protrusion structure is a plurality of fin protrusions extending in the vertical direction, and vertical grooves extending in the vertical direction are formed between the plurality of fin protrusions; the wind flows through the second cold plate surface of the cold plate, and the second cold plate surface of the cold plate also dissipates heat.

2. The compression-cooling fiber laser according to claim 1, It is characterized in that The cold plate and the cold plate heat dissipation fin protrusion structure are an integrated structure.

3. The compression-cooling fiber laser according to claim 1, It is characterized in that The four side edges around the cold plate are in contact with the upper cabinet plate, the lower cabinet plate, the second side plate and the fourth side plate of the shell respectively, and the cold plate and the shell together enclose a sealable first internal space.

4. The compression-cooling fiber laser according to claim 1, It is characterized in that The laser refrigeration device is installed in the second internal space, wherein the condenser is located on the upper side of the second internal space, the condenser includes a condensing fin device with a buried refrigerant pipe, the condensing fin device is located between the compressor device and the first ventilation hole; the first ventilation hole is located on the upper side of the second internal space, and the second ventilation hole is located on the lower side of the second internal space; the condensing fin device is installed on the lower side of the first ventilation hole of the upper cabinet plate, the condensing fin device has multiple gaps between the fins, and the multiple gaps constitute an air duct from bottom to top.

5. The compression-cooling fiber laser according to claim 4, It is characterized in that The cold plate is a single-sided buried tube cold plate or a double-sided buried tube cold plate; the first fan group is located at the lower side of the first ventilation hole and the upper side of the condensing fin group, and the second fan group is located between the compressor and the second ventilation hole.

6. The compression-cooling fiber laser according to claim 1, It is characterized in that The air-cooled laser includes an optoelectronic interface part, the optoelectronic interface part includes a plurality of optoelectronic interfaces, and the second side plate of the housing has an optoelectronic interface mounting area close to the first side plate and a heat dissipation surface area close to the third side plate; The optoelectronic interface installation area is used to install at least part or all of the interfaces of the optoelectronic interface part. The optoelectronic interface installation area of ​​the second side panel corresponds to the side of the first internal space. The heat dissipation surface area of ​​the second side panel corresponds to the side of the second internal space. A surface structure for enhancing heat dissipation is arranged in the heat dissipation surface area of ​​the second side panel.

7. The compression-cooling fiber laser according to claim 6, It is characterized in that The optoelectronic interface part is used for the optoelectronic connection between the laser body and the outside, including the equipment power input port, safety lock interface, control signal input interface, output optical cable interface, and the optoelectronic interface installation area is used to install all interfaces of the optoelectronic interface part.

8. The compression-cooling fiber laser according to claim 7, It is characterized in that It also includes a laser driving part, the pump laser unit is more than one semiconductor laser, and also includes an N+1 forward and reverse fiber combiner, the gain fiber part is an ytterbium-doped gain fiber and a first grating and a second grating located at both ends of the ytterbium-doped gain fiber; the N+1 forward and reverse fiber combiner is used to couple the pump light beam emitted by the pump laser unit into the gain fiber part, the laser refrigeration device also includes an electromagnetic four-way reversing valve, a refrigerant storage tank, and a variable frequency compressor connected to the condenser and the cold plate refrigerant pipeline through a refrigerant pipeline, the refrigerant pipeline and the cold plate refrigerant pipeline are filled with refrigerant refrigerant, the laser refrigeration device also includes a drying filter, the drying filter is arranged between the condenser and the thermal expansion valve, and the condenser adopts an aluminum parallel flow heat exchanger; the pump laser unit, the gain fiber part, and the N+1 forward and reverse fiber combiner of the optical part are all integrated and installed on the cold plate.

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