Nonlinear optical crystal temperature control device

Abstract

The utility model belongs to the technical field of laser nonlinear frequency conversion, and discloses a nonlinear crystal temperature control device. The nonlinear optical crystal temperature control device comprises a base, a heat conduction piece and a semiconductor cooler. The heat conduction piece is arranged on the base, the nonlinear optical crystal is elastically pressed on the heat conduction piece through the elastic piece, the semiconductor cooler is arranged between the heat conduction piece and the base, and a temperature sensor is arranged in the heat conduction piece and used for detecting the temperature of the heat conduction piece. And the semiconductor cooler can be used for heating and cooling the nonlinear optical crystal through the heat conduction piece. The nonlinear optical crystal temperature control device is simple in structure, and the nonlinear optical crystal is elastically fixed by the elastic piece and is convenient to disassemble and assemble; meanwhile, according to the temperature, detected by the temperature sensor, of the heat conduction piece, the semiconductor cooler is controlled to be heated and cooled, so that precise heating and cooling of the nonlinear optical crystal attached to the heat conduction piece are achieved through the heat conduction piece.

Description

Technical Field

[0001] The utility model relates to the technical field of laser nonlinear frequency conversion, in particular to a nonlinear optical crystal temperature control device. Background Art

[0002] Laser nonlinear frequency conversion technology achieves the expansion of laser wavelength range by changing laser frequency, thus broadening the application range of laser. Laser nonlinear frequency conversion is widely used in semiconductor material processing, laser surgery, optical communication and other fields, and plays an important role in industry, medicine, communication and other fields.

[0003] Laser nonlinear frequency conversion technology usually uses nonlinear optical crystals to refract lasers to change the frequency of lasers. Common nonlinear optical crystals include PPLN frequency doubling crystals and LBO frequency doubling crystals. The refractive index of such nonlinear optical crystals is greatly affected by temperature, and the refractive index changes significantly when the temperature changes. Therefore, it is necessary to control the temperature of such crystals to maximize the laser nonlinear frequency conversion efficiency. The temperature control device in the prior art has many components, a complex structure, is not easy to disassemble, and has poor temperature control accuracy. Utility Model Content

[0004] The utility model aims to provide a nonlinear optical crystal temperature control device, which can realize accurate temperature control of the nonlinear optical crystal, and at the same time designs the overall structure of the nonlinear optical crystal temperature control device to make it simple in structure and easy to disassemble and assemble.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A nonlinear optical crystal temperature control device, characterized in that it comprises

[0007] Base;

[0008] A heat-conducting member is arranged on the base, and the nonlinear optical crystal is elastically pressed on the heat-conducting member through an elastic member;

[0009] A semiconductor refrigerator is arranged between the base and the heat-conducting member. A temperature sensor is arranged in the heat-conducting member. The temperature sensor is used to detect the temperature of the heat-conducting member, and the temperature sensor is communicatively connected with the semiconductor refrigerator.

[0010] Preferably, one end of the elastic member is fixed to the heat conductor, and the other end is a free end. A pressing plate is provided above the nonlinear optical crystal, and the free end of the elastic member can abut against the upper surface of the pressing plate to press the nonlinear optical crystal.

[0011] Preferably, a light-through groove is provided on the upper surface of the heat conductor, and the light-through groove runs through the two opposite ends of the heat conductor. The nonlinear optical crystal is placed in the light-through groove, and a limiting groove is provided on the side wall of the light-through groove so that the pressure plate can be limited by the limiting groove after being placed above the nonlinear optical crystal.

[0012] Preferably, the elastic member is a spring sheet, a fixed end of the spring sheet is located at one side of the limiting groove, and a free end of the spring sheet is elastically pressed against the upper surface of the pressing plate.

[0013] Preferably, a heat-insulating cover is provided on the outside of the heat-conducting component, and light-through holes are formed on the heat-insulating cover at corresponding ends of the light-through groove.

[0014] Preferably, the pressing plate is a glass sheet.

[0015] Preferably, a temperature sensor installation groove is provided on a side of the heat conducting member away from the nonlinear optical crystal, and the thickness of the temperature sensor is smaller than the depth of the temperature sensor installation groove.

[0016] Preferably, a semiconductor refrigerator mounting groove is provided on the base, and multiple semiconductor refrigerators can be installed in the semiconductor refrigerator mounting groove. The side wall of the semiconductor refrigerator mounting groove is provided with a wiring hole extending to the outside of the base, and the wiring hole is used for control lines and power supply lines to pass through.

[0017] Preferably, a heat conducting material layer is provided on both the upper and lower surfaces of the semiconductor refrigerator.

[0018] Preferably, a heat dissipation groove is provided on a side of the base away from the semiconductor refrigerator, a heat dissipation fan is fixed to the bottom of the heat dissipation groove, and heat dissipation fins are provided at the bottom of the heat dissipation groove.

[0019] Beneficial effects of the utility model:

[0020] The utility model is provided with a base, a semiconductor refrigerator, a heat-conducting member and a nonlinear optical crystal in sequence from bottom to top, and has a simple structure. The nonlinear optical crystal is elastically fixed by an elastic member, and is convenient to assemble and disassemble. At the same time, the utility model can increase or decrease the temperature of the semiconductor refrigerator according to the temperature of the heat-conducting member detected by a temperature sensor, so as to realize accurate increase or decrease in the temperature of the nonlinear optical crystal attached to the heat-conducting member through the heat-conducting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall view of the nonlinear optical crystal temperature control device provided by the utility model;

[0022] Figure 2 This is a base view of the nonlinear optical crystal temperature control device provided by the utility model;

[0023] Figure 3 This is a view of a semiconductor refrigerator of the nonlinear optical crystal temperature control device provided by the utility model;

[0024] Figure 4 This is a view of a semiconductor refrigerator of the nonlinear optical crystal temperature control device provided by the utility model when it is installed on a base;

[0025] Figure 5 This is a view of a heat conducting member of the nonlinear optical crystal temperature control device provided by the utility model;

[0026] Figure 6 This is a view of a pressure plate of the nonlinear optical crystal temperature control device provided by the utility model;

[0027] Figure 7 This is a view of the elastic member of the nonlinear optical crystal temperature control device provided by the utility model;

[0028] Figure 8 This is a nonlinear optical crystal view of the nonlinear optical crystal temperature control device provided by the utility model;

[0029] Fig. 9 This is a structural view of the nonlinear optical crystal of the nonlinear optical crystal temperature control device provided by the utility model when the nonlinear optical crystal is fixed to the heat conducting member;

[0030] Fig.10 This is a view of a heat preservation cover of the nonlinear optical crystal temperature control device provided by the utility model;

[0031] Fig.11 It is an overall bottom side view of the nonlinear optical crystal temperature control device provided by the utility model.

[0032] In the figure: 1-base; 11-semiconductor refrigerator mounting slot; 12-wiring hole; 13-heat dissipation slot; 14-heat dissipation fin; 15-base mounting hole; 2-heat conducting member; 21-light-through slot; 22-limiting slot; 3-semiconductor refrigerator; 4-nonlinear optical crystal; 5-pressing plate; 6-elastic member; 7-insulation cover; 71-light-through hole; 8-cooling fan. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] The utility model provides a nonlinear optical crystal temperature control device for realizing accurate temperature control of the nonlinear optical crystal. Meanwhile, the nonlinear optical crystal temperature control device has a simple structure and is convenient for disassembling and assembling the nonlinear optical crystal.

[0038] like Figure 1-Figure 10As shown, the nonlinear optical crystal temperature control device in this embodiment includes a base 1, a heat conducting member 2 and a semiconductor refrigerator 3. The base 1 is used as a mounting base, and the heat conducting member 2 and the semiconductor refrigerator 3 are both mounted on the base 1. The heat conducting member 2 is arranged on the base 1, and the nonlinear optical crystal 4 is elastically pressed on the heat conducting member 2 by the elastic member 6. When disassembling the nonlinear optical crystal 4, it is only necessary to apply an external force to the elastic member 6 to deform it, thereby removing the pressing force on the heat conducting member 2, and then taking out the nonlinear optical crystal 4. The process of installing the nonlinear optical crystal 4 only needs to adopt the opposite steps of the disassembly. Specifically, the heat conducting member 2 is provided with mounting holes at the four corners, and the heat conducting member 2 is fixed to the base 1 by screws. The nonlinear optical crystal 4 is pressed and attached to the upper surface of the heat conducting member 2 by the elastic member 6 and is in full contact with the heat conducting member 2 for heat exchange. The semiconductor refrigerator 3 is arranged between the base 1 and the heat conducting member 2, and a temperature sensor is arranged in the heat conducting member 2, and the temperature sensor is used to detect the temperature of the heat conducting member 2. The temperature sensor is connected to the semiconductor refrigerator 3 for communication. Specifically, according to the temperature of the heat-conducting member detected by the temperature sensor, the semiconductor refrigerator can increase or decrease the temperature of the nonlinear optical crystal through the heat-conducting member. Specifically, base mounting holes 15 for fixing the base 1 are also provided on both sides of the base 1. Furthermore, the semiconductor refrigerator 3, namely TEC, is a common temperature control device in the prior art, and the temperature control accuracy can reach 0.01 degrees. Various semiconductor refrigerators 3 of companies such as Ferrotec and Laird can meet the temperature control requirements of the nonlinear optical crystal 4 of this application, so the specific model of the semiconductor refrigerator 3 is not limited here. The semiconductor refrigerator 3 is in contact with both the upper surface of the base 1 and the lower surface of the heat-conducting member 2, and sufficient heat exchange is performed.

[0039] One end of the elastic member 6 in this embodiment is fixed on the heat conducting member 2, and the other end is a free end. A pressing plate 5 is arranged above the nonlinear optical crystal 4, and the free end of the elastic member 6 can abut against the upper surface of the pressing plate 5, so that the pressing plate 5 elastically presses the nonlinear optical crystal 4. When installing the nonlinear optical crystal 4, it is only necessary to lift the free end of the elastic member 6 and then place the pressing plate 5 and the nonlinear optical crystal 4 under the free end of the elastic member 6 in sequence, and then put down the free end of the elastic member 6 to complete the installation of the nonlinear optical crystal 4; when disassembling the nonlinear optical crystal 4, it is only necessary to lift the free end of the elastic member 6 and then take out the pressing plate 5 and the nonlinear optical crystal 4 in sequence to complete the disassembly of the nonlinear optical crystal 4. Specifically, the surface area of ​​the pressing plate 5 is larger than the surface area of ​​the nonlinear optical crystal 4. When the pressing plate 5 is pressed on the nonlinear optical crystal 4, the upper surface of the nonlinear optical crystal 4 is completely covered, and the pressing plate 5 is made of hard material, so that the nonlinear optical crystal 4 can be subjected to uniform force, thereby preventing crystal damage caused by uneven force.

[0040] The upper surface of the heat conducting member 2 in this embodiment is provided with a light-through groove 21, which is provided through the two opposite ends of the heat conducting member 2. The nonlinear optical crystal 4 is placed in the light-through groove 21, and the side wall of the light-through groove 21 is provided with a limiting groove 22, so that the pressing plate 5 is limited by the limiting groove 22 after being placed above the nonlinear optical crystal 4. Specifically, because the nonlinear optical crystal 4 needs to refract the laser to complete the laser frequency doubling, the light-through groove 21 can facilitate the laser to pass through one end of the light-through groove 21 to irradiate the nonlinear optical crystal 4 and be emitted from the other end of the light-through groove 21. The distance between the limiting groove 22 provided in the middle of the light-through groove 21 and the side wall of the light-through groove 21 is slightly greater than the width of the pressing plate 5, and the width of the pressing plate 5 is greater than the distance between the two side walls of the other parts of the light-through groove 21. Therefore, when the pressing plate 5 is placed in the limiting groove 22 and pressed above the nonlinear optical crystal 4, it is limited by the limiting groove 22 to move in the light-through groove 21, and at the same time, the pressing plate 5 is completely fixed due to the pressing effect of the elastic member 6. Furthermore, the nonlinear optical crystal 4 and the limiting groove 22 are both arranged in the middle of the light passing groove 21 .

[0041] like Figure 8 As shown, the elastic member 6 in this embodiment is a spring, the fixed end of which is located on one side of the limiting groove 22, and the free end of which is pressed against the upper surface of the pressing plate 5. Specifically, the spring is a highly elastic steel sheet, the fixed end of which is provided with a connecting hole, and the heat conductor 2 is also provided with a corresponding screw mounting hole on one side of the limiting groove 22, and the spring is fixed to one side of the limiting groove 22 by a screw. At the same time, there are two springs, which are arranged at intervals and the free ends of the two springs are elastically pressed against the upper surface of the pressing plate together. In some other embodiments, the elastic member 6 may be a spring, which is placed vertically, the lower end of which is in contact with the pressing plate 5, and the upper end of which is fixed to the mounting plate extending from the heat conductor 2.

[0042] The pressing plate 5 in this embodiment is a glass sheet. Specifically, the glass sheet is a glass sheet with a length of 30 mm, a width of 11 mm, and a height of 2 mm, and the nonlinear optical crystal 4 is a crystal sheet with a length of 30 mm, a width of 5 mm, and a height of 0.5 mm. During assembly, the long side of the nonlinear optical crystal 4 abuts against the side wall of the light-through groove 21, and the long side of the glass sheet abuts against the side wall of the light-through groove 21 while pressing against the upper surface of the nonlinear optical crystal 4. Such an arrangement can ensure that the pressing plate 5 presses the nonlinear optical crystal 4 as a whole below. At this time, due to the high flatness of the glass sheet, the force can be evenly applied when subjected to force, providing uniform pressure for the nonlinear optical crystal 4 pressed below, thereby preventing the nonlinear optical crystal 4 from being damaged due to uneven force. At the same time, the arrangement of using the spring sheet to press the glass sheet can ensure that the nonlinear optical crystal 4 has sufficient deformation space when it expands and contracts due to temperature changes, thereby preventing the nonlinear optical crystal 4 from being damaged due to thermal expansion or from being reduced in fixity due to contraction due to cold.

[0043] like Figure 1 and Fig.10As shown, in this embodiment, a heat-insulating cover 7 is further provided outside the heat-conducting member 2, and the heat-insulating cover 7 is provided with light-through holes 71 at the two ends corresponding to the light-through groove 21. Specifically, the heat-insulating cover 7 is made of a hard material with low thermal conductivity, and a mounting hole is provided on the upper surface of the heat-insulating cover 7, and a mounting hole is also provided at the corresponding position of the heat-conducting member 2, and the heat-insulating cover 7 is installed on the heat-conducting member 2 by screws through the above-mentioned mounting holes. When the heat-insulating cover 7 is fixed to the heat-conducting member 2, the bottom of the heat-insulating cover 7 abuts against the base 1, that is, the heat-insulating cover 7 covers the heat-conducting member 2 as a whole. The light-through hole 71 provided on the heat-insulating cover 7 is used for the input of fundamental frequency light and the output of frequency-doubled light, and the overall shape of the light-through hole 71 is a rectangular with rounded corners, so the size of the light-through hole 71 is slightly larger than the cross-sectional size of the nonlinear optical crystal 4 perpendicular to the light-through groove 21, that is, the length of the light-through hole 71 is greater than 5 mm, and the width is greater than 0.5 mm. At the same time, the use of the heat preservation cover 7 can reduce the impact of the external environment and dust on the nonlinear optical crystal 4, improve the stability of the nonlinear optical crystal 4 when in use, and arranging the nonlinear optical crystal 4 in the middle of the light-through groove 21 is conducive to keeping a certain distance between the nonlinear optical crystal 4 and the light-through hole 71, further reducing the impact of the external environment and dust on the nonlinear optical crystal 4.

[0044] Specifically, a temperature sensor mounting groove is provided on the side of the heat conducting member 2 in this embodiment away from the nonlinear optical crystal 4, and the thickness of the temperature sensor is less than the depth of the temperature sensor mounting groove, so that the temperature sensor is recessed in the temperature sensor mounting groove. That is, a groove is provided on the side of the heat conducting member 2 close to the base 1, and this groove is used as the temperature sensor mounting groove, that is, the temperature sensor contacts the heat conducting member 2 after installation, and does not directly contact the semiconductor refrigerator 3 located below the heat conducting member 2. At this time, the temperature measured by the temperature sensor is the temperature of the heat conducting member 2, so as to achieve more accurate heating and cooling of the nonlinear optical crystal 4. Furthermore, the number of semiconductor refrigerators 3 that can be installed in the semiconductor refrigerator mounting groove 11 is three, and the three semiconductor refrigerators 3 work together to adjust the temperature.

[0045] Specifically, the base 1 is provided with a semiconductor refrigerator installation groove 11, which can install multiple semiconductor refrigerators 3, and the side wall of the semiconductor refrigerator installation groove 11 is provided with a wiring hole 12 extending to the outside of the base 1, and the wiring hole 12 is used for the control circuit and the power supply circuit to pass through. The control circuit located outside the nonlinear optical crystal temperature control device is connected to the nonlinear optical crystal temperature control device through the control circuit, and the power supply is electrically connected to the nonlinear optical crystal temperature control device through the power supply circuit. The control circuit and the power supply circuit are both routed through the wiring hole 12 to ensure the normal operation of the semiconductor refrigerator 3.

[0046] Furthermore, a heat conductive material layer is provided on the upper and lower surfaces of the semiconductor refrigerator 3, and the heat conductive material facilitates sufficient heat exchange between the heat conducting member 2, the semiconductor refrigerator 3 and the base 1. Specifically, in this embodiment, heat dissipation silicone grease can be applied to the upper and lower surfaces of the semiconductor refrigerator to facilitate heat exchange.

[0047] like Fig.11 As shown, specifically, a heat dissipation slot 13 is provided on one side of the base 1 away from the semiconductor refrigerator 3, a heat dissipation fan 8 is fixed to the bottom of the heat dissipation slot 13, and a heat dissipation fin 14 is provided at the bottom of the heat dissipation slot 13. When the nonlinear optical crystal 4 needs to be cooled, the heat dissipation fin 14 and the heat dissipation fan 8 of the base 1 can timely conduct away the heat. Further, the heat dissipation fan 8 is detachably provided in the heat dissipation slot 13, and is fixed to the bottom of the heat dissipation slot 13 by screws and abuts against the heat dissipation fin 14, and a corresponding threaded mounting hole is provided at the bottom of the base 1.

[0048] Specifically, the heat conductor 2 and the base 1 are both made of materials with high thermal conductivity to facilitate heat conduction. Further, the heat conductor 2 is made of copper, and the base 1 is made of aluminum alloy. The nonlinear optical crystal 4 in this embodiment is a PPLN frequency doubling crystal. The higher the temperature control accuracy of the PPLN frequency doubling crystal, the more obvious its efficiency is, and the more obvious the frequency doubling effect on the laser is.

[0049] Specifically, the specific installation and use process of the nonlinear optical crystal 4 temperature control device in this embodiment is as follows: first, the semiconductor refrigerator 3 is placed in the semiconductor refrigerator installation groove 11 reserved in the base 1, and a high-precision temperature sensor is pre-installed in the temperature sensor installation groove at the bottom of the heat-conducting member 2, and the power supply line and the control line are extended through the wiring hole 12 of the base 1 to connect to the control circuit. Then the heat-conducting member 2 is installed on the base 1 with screws, and the semiconductor refrigerator 3 is placed between the base 1 and the heat-conducting member 2. The upper and lower surfaces of the semiconductor refrigerator 3 are also coated with a heat-conducting material with high thermal conductivity to accelerate the temperature exchange between the heat-conducting member 2, the semiconductor refrigerator 3 and the base 1. The glass sheet is pressed with a spring and the PPLN frequency-doubling crystal is sandwiched between the glass sheet and the upper surface of the heat-conducting member 2, and the spring is fixed with screws. Finally, the heat-insulating cover 7 and the heat-dissipating fan 8 are installed. In actual use, the fundamental frequency light is injected into the PPLN frequency doubling crystal through the light hole 71, and the laser after frequency doubling output from the output hole is irradiated onto the power detector to check and monitor the output power. By setting different temperatures to observe the change of the output power, the temperature value with the highest output power is found and set as the optimal temperature, and the PPLN crystal is kept at this temperature for a long time. Specifically, when the detected temperature of the temperature sensor is higher than the optimal temperature, the semiconductor refrigerator 3 enters the cooling mode for the PPLN frequency doubling crystal, and controls the direction of the internal current of the semiconductor refrigerator 3 so that its upper surface is the cold end and its lower surface is the hot end, and then cools the PPLN frequency doubling crystal by lowering the temperature of the heat conductor 2; when the detected temperature of the temperature sensor is lower than the optimal temperature, the semiconductor refrigerator 3 enters the heating mode for the PPLN frequency doubling crystal, and controls the direction of the internal current of the semiconductor refrigerator 3 so that its upper surface is the hot end and its lower surface is the cold end, and then heats the PPLN frequency doubling crystal by increasing the temperature of the heat conductor 2.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A nonlinear optical crystal temperature control device, characterized in that: include Base (1); A heat conducting member (2), the heat conducting member (2) being arranged on the base (1), and the nonlinear optical crystal (4) being elastically pressed onto the heat conducting member (2) via an elastic member (6); A semiconductor refrigerator (3), wherein the semiconductor refrigerator (3) is arranged between the base (1) and the heat-conducting member (2), wherein a temperature sensor is arranged in the heat-conducting member (2), wherein the temperature sensor is used to detect the temperature of the heat-conducting member (2), and the temperature sensor is communicatively connected with the semiconductor refrigerator (3).

2. The nonlinear optical crystal temperature control device according to claim 1, characterized in that: One end of the elastic member (6) is fixed to the heat conducting member (2), and the other end is a free end. A pressing plate (5) is provided above the nonlinear optical crystal (4), and the free end of the elastic member (6) can abut against the upper surface of the pressing plate (5) to press the nonlinear optical crystal (4).

3. The nonlinear optical crystal temperature control device according to claim 2, characterized in that: The upper surface of the heat conducting member (2) is provided with a light-through groove (21), the light-through groove (21) is provided through two opposite ends of the heat conducting member (2), the nonlinear optical crystal (4) is placed in the light-through groove (21), and the side wall of the light-through groove (21) is provided with a limiting groove (22), so that the pressing plate (5) is limited by the limiting groove (22) after being placed above the nonlinear optical crystal (4).

4. The nonlinear optical crystal temperature control device according to claim 3, characterized in that: The elastic member (6) is a spring sheet, the fixed end of which is located on one side of the limiting groove (22), and the free end of which is elastically pressed against the upper surface of the pressing plate (5).

5. The nonlinear optical crystal temperature control device according to claim 3, characterized in that: The heat-conducting component (2) is externally covered with a heat-insulating cover (7), and the heat-insulating cover (7) is provided with light-through holes (71) at two corresponding ends of the light-through groove (21).

6. The nonlinear optical crystal temperature control device according to claim 2, characterized in that: The pressing plate (5) is a glass sheet.

7. The nonlinear optical crystal temperature control device according to any one of claims 1 to 6, characterized in that: A temperature sensor installation groove is provided on a side of the heat conducting member (2) away from the nonlinear optical crystal (4), and the thickness of the temperature sensor is smaller than the depth of the temperature sensor installation groove.

8. The nonlinear optical crystal temperature control device according to any one of claims 1 to 6, characterized in that: The base (1) is provided with a semiconductor refrigerator installation groove (11), and the semiconductor refrigerator installation groove (11) can install a plurality of semiconductor refrigerators (3). The side wall of the semiconductor refrigerator installation groove (11) is provided with a wiring hole (12) extending to the outside of the base (1), and the wiring hole (12) is used for control circuits and power supply circuits to pass through.

9. The nonlinear optical crystal temperature control device according to any one of claims 1 to 6, characterized in that: The upper and lower surfaces of the semiconductor refrigerator (3) are both provided with heat-conducting material layers.

10. The nonlinear optical crystal temperature control device according to any one of claims 1 to 6, characterized in that: A heat dissipation groove (13) is provided on a side of the base (1) away from the semiconductor refrigerator (3); a heat dissipation fan (8) is fixed to the bottom of the heat dissipation groove (13); and heat dissipation fins (14) are provided at the bottom of the heat dissipation groove (13).

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