Low-cost TO18 and TO38 packaging visible light laser band temperature control test tool

Abstract

The utility model relates to the technical field of photoelectron testing, in particular to a low-cost TO18 and TO38 packaging visible light laser testing tool with a temperature control function, which comprises a fan with a temperature control function, an aluminum profile radiator, a semiconductor cooler with a central hole, a copper radiating seat, a radiating seat fixing assembly and a laser fixing assembly. TO18 and TO38 standard sockets are arranged between the aluminum profile radiator and the fan with the temperature control function, the fan with the temperature control function is further provided with an electrical interface transition PC board and an eight-pin electrical interface socket, the semiconductor cooler with the center hole is connected with the aluminum profile radiator, the copper radiating seat is connected with the semiconductor cooler with the center hole, and the copper radiating seat is connected with the aluminum profile radiator. The heat dissipation base fixing assembly is used for fixing a copper heat dissipation base, and the laser fixing assembly is used for fixing TO18 and TO38 packaged visible light lasers, so that the technical problems of high cost, complex structure and large size of a temperature control mode during testing of the lasers in the prior art are solved.

Description

Low-cost TO18 and TO38 packaged visible light lasers with temperature-controlled testing fixtures Technical Field

[0001] This utility model relates to the field of optoelectronic testing technology, and in particular to a low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture. Background Technology

[0002] In the field of optoelectronic testing technology, semiconductor lasers (such as visible light lasers) are key components whose performance stability is closely related to temperature. Because semiconductor lasers are temperature-sensitive devices, their photoelectric parameters (such as output power, wavelength, and threshold current) fluctuate significantly with temperature changes. Therefore, precise temperature control is crucial for ensuring the accuracy and consistency of test results during the research, development, production, and quality inspection of semiconductor lasers.

[0003] In existing technologies, the above problems are usually solved by purchasing or customizing complete sets of testing instruments. However, this approach has the problems of high cost, complex structure, and large size. Summary of the Invention

[0004] The purpose of this invention is to provide a low-cost temperature-controlled testing fixture for TO18 and TO38 packaged visible light lasers, aiming to solve the technical problems of high cost, complex structure, and large size in the existing temperature control methods for testing lasers.

[0005] To achieve the above objectives, this utility model employs a low-cost temperature-controlled testing fixture for TO18 and TO38 packaged visible light lasers, comprising a temperature-controlled fan, an aluminum profile heat sink, a semiconductor cooler with a central hole, a copper heat sink base, a heat sink base fixing assembly, and a laser fixing assembly. A TO18 or TO38 standard socket is provided between the aluminum profile heat sink and the temperature-controlled fan. The temperature-controlled fan also has an electrical interface transition PC board and an 8-pin electrical interface socket. The semiconductor cooler with a central hole is connected to the aluminum profile heat sink, and the copper heat sink base is connected to the semiconductor cooler with a central hole. The heat sink base fixing assembly is used to fix the copper heat sink base, and the laser fixing assembly is used to fix the TO18 and TO38 packaged visible light lasers. A glass-sealed thermistor is installed on the copper heat sink base.

[0006] The heat sink fixing assembly includes two clamping members and multiple fixing screws. The multiple fixing screws pass through the corresponding clamping members and are all tightened onto the aluminum profile heat sink. The clamping members are in contact with the copper heat sink.

[0007] The clamping component includes a positioning block and a mating block. The copper heat sink has two mating grooves. Multiple fixing screws pass through the corresponding positioning blocks and are all tightened onto the aluminum profile heat sink. The mating block is fixedly connected to the positioning block and is located in the corresponding mating groove.

[0008] The laser fixing assembly includes a laser clamping plate and a rotating shaft limiting screw. The laser clamping plate is rotatably connected to the copper heat sink, and the rotating shaft limiting screw is used to fix the rotating shaft of the laser clamping plate.

[0009] The laser fixing assembly further includes a clamping plate locking lever and a locking release button. The clamping plate locking lever and the locking release button work together to lock or unlock the laser clamping plate.

[0010] This utility model is a low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture. In specific use, a TO18 or TO38 standard socket is set between the aluminum profile heat sink and the temperature-controlled fan. The copper heat sink is fixed with the heat sink fixing assembly, and the TO18 or TO38 packaged visible light laser is fixed with the laser fixing assembly.

[0011] This utility model uses the semiconductor cooler with a central hole and the matching fan with temperature control function to reduce the structural complexity of the constant temperature control system and solve the shortcomings such as low tooling compactness, large space occupation and inconvenient operation.

[0012] By cleverly miniaturizing the copper heat sink on the upper surface of the semiconductor cooler, the TO tube seat clamping mechanism achieves advantages such as small size, convenient operation, and high efficiency. It also solves the problem of increased heat load on the semiconductor cooler caused by typically larger clamping mechanisms.

[0013] By utilizing the characteristics of the semiconductor cooler—cooling with forward current and heating with reverse current—and combining it with a temperature control circuit that can provide both forward and reverse control currents, it becomes possible to rapidly and accurately maintain the temperature of the laser under test. This improves the efficiency of testing and the accuracy of performance testing, with a temperature control accuracy of up to 0.2℃. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 is a schematic diagram of the structure of the low-cost TO18 and TO38 packaged visible light laser with temperature control test fixture of this utility model.

[0016] Figure 2 is an exploded view of the low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture of this utility model.

[0017] Figure 3 is a system block diagram of the low-cost TO18 and TO38 packaged visible light laser with temperature control test fixture of this utility model.

[0018] 1- Fan with temperature control function; 2- Aluminum profile heat sink; 3- Semiconductor cooler with center hole; 4- Copper heat sink base; 5- Fixing screw; 6- Positioning block; 7- Mating block; 8- Laser clamping plate; 9- Shaft limit screw; 10- Clamping plate locking lever; 11- Locking release button; 12- TO18, TO 38 standard socket; 13- Electrical interface transition PC board; 14- 8-pin electrical interface socket; 15- Glass-sealed thermistor; 16- TO18, TO 38 packaged laser. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please refer to Figures 1-3. Figure 1 is a structural schematic diagram of the low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture of this invention. Figure 2 is an exploded view of the low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture of this invention. Figure 3 is a system block diagram of the low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture of this invention.

[0021] This utility model provides a low-cost temperature-controlled testing fixture for TO18 and TO38 packaged visible light lasers, including a temperature-controlled fan 1, an aluminum profile heat sink 2, a semiconductor cooler 3 with a central hole, a copper heat sink 4, a heat sink fixing assembly, and a laser fixing assembly. A TO18 or TO38 standard socket 12 is provided between the aluminum profile heat sink 2 and the temperature-controlled fan 1. The temperature-controlled fan 1 is also provided with an electrical interface transition PC board 13 and an 8-pin electrical interface socket 14. The semiconductor cooler 3 with a central hole is connected to the aluminum profile heat sink 2, and the copper heat sink 4 is connected to the semiconductor cooler 3 with a central hole. The heat sink fixing assembly is used to fix the copper heat sink 4, and the laser fixing assembly is used to fix the TO18 or TO38 packaged visible light laser 16. A glass-sealed thermistor 15 is installed on the copper heat sink 4.

[0022] In this specific embodiment, during actual use, a TO18 or TO38 standard socket 12 is provided between the aluminum profile heat sink 2 and the temperature-controlled fan 1. The copper heat sink 4 is fixed using the heat sink fixing assembly, and the TO18 or TO38 packaged visible light laser 16 is fixed using the laser fixing assembly.

[0023] This utility model uses the semiconductor cooler with a central hole and the matching fan 1 with temperature control function to reduce the structural complexity of the constant temperature control system and solve the shortcomings such as low tooling compactness, large space occupation and inconvenient operation.

[0024] By cleverly miniaturizing the copper heat sink on the upper surface of the semiconductor cooler, the TO tube seat clamping mechanism achieves advantages such as small size, convenient operation, and high efficiency. It also solves the problem of increased heat load on the semiconductor cooler caused by typically larger clamping mechanisms.

[0025] By utilizing the characteristics of the semiconductor cooler—cooling with forward current and heating with reverse current—and combining it with a temperature control circuit that can provide both forward and reverse control currents, it becomes possible to rapidly and accurately maintain the temperature of the laser under test. This improves the efficiency of testing and the accuracy of performance testing, with a temperature control accuracy of up to 0.2℃.

[0026] The heat sink fixing assembly includes two clamping parts and multiple fixing screws 5. The multiple fixing screws 5 pass through the corresponding clamping parts and are all tightened onto the aluminum profile heat sink 2. The clamping parts are in contact with the copper heat sink 4.

[0027] The clamping component includes a positioning block 6 and a fitting block 7. The copper heat sink 4 has two fitting grooves. Multiple fixing screws 5 pass through the corresponding positioning blocks 6 and are all tightened onto the aluminum profile heat sink 2. The fitting block 7 is fixedly connected to the positioning block 6 and is located in the corresponding fitting groove.

[0028] In this specific embodiment, the two fitting blocks 7 are placed in the corresponding fitting grooves, and the multiple fixing screws 5 pass through the corresponding positioning blocks 6 and are all tightened onto the aluminum profile heat sink 2 to fix and install the copper heat sink 4.

[0029] Secondly, the laser fixing assembly includes a laser clamping plate 8 and a rotating shaft limiting screw 9. The laser clamping plate 8 is rotatably connected to the copper heat sink 4, and the rotating shaft limiting screw 9 is used to fix the rotating shaft of the laser clamping plate 8.

[0030] The laser fixing assembly also includes a clamping plate locking lever 10 and a locking release button 11. The clamping plate locking lever 10 and the locking release button 11 cooperate to lock or unlock the laser clamping plate 8.

[0031] In this specific embodiment, the visible light laser 16 packaged in TO18 and TO38 is pressed by the laser clamping plate 8, and the rotating shaft of the laser clamping plate 8 is fixed by the rotating shaft limiting screw 9. At the same time, the laser clamping plate locking lever 10 and the locking release button 11 are used to lock or unlock the laser clamping plate 8.

[0032] In a low-cost TO18 and TO38 packaged visible light laser with temperature control test fixture, the present invention is used to set up a TO18 and TO38 standard socket 12 between the aluminum profile heat sink 2 and the temperature-controlled fan 1, fix the copper heat sink 4 with the heat sink fixing assembly, and fix the TO18 and TO38 packaged visible light laser 16 with the laser fixing assembly.

[0033] This utility model uses the semiconductor cooler with a central hole and the matching fan 1 with temperature control function to reduce the structural complexity of the constant temperature control system and solve the shortcomings such as low tooling compactness, large space occupation and inconvenient operation.

[0034] By cleverly miniaturizing the copper heat sink on the upper surface of the semiconductor cooler, the TO tube seat clamping mechanism achieves advantages such as small size, convenient operation, and high efficiency. It also solves the problem of increased heat load on the semiconductor cooler caused by typically larger clamping mechanisms.

[0035] By utilizing the characteristics of the semiconductor cooler—cooling with forward current and heating with reverse current—and combining it with a temperature control circuit that can provide both forward and reverse control currents, it becomes possible to rapidly and accurately maintain the temperature of the laser under test. This improves the efficiency of testing and the accuracy of performance testing, with a temperature control accuracy of up to 0.2℃.

[0036] This utility model has the advantages of simpler structure, more compact size, and smaller size;

[0037] This utility model has the advantages of low cost, convenient operation and high work efficiency;

[0038] This invention employs a thermostatic control circuit that uses forward current for cooling and reverse current for heating in the semiconductor cooler, thereby improving the efficiency of testing and the accuracy of performance testing.

[0039] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture, characterized in that, The device includes a temperature-controlled fan, an aluminum profile heat sink, a semiconductor cooler with a center hole, a copper heat sink base, a heat sink base fixing assembly, and a laser fixing assembly. A TO18 and TO38 standard socket is provided between the aluminum profile heat sink and the temperature-controlled fan. The temperature-controlled fan also has an electrical interface transition PC board and an 8-pin electrical interface socket. The semiconductor cooler with a center hole is connected to the aluminum profile heat sink, and the copper heat sink base is connected to the semiconductor cooler with a center hole. The heat sink base fixing assembly is used to fix the copper heat sink base, and the laser fixing assembly is used to fix the TO18 and TO38 packaged visible light lasers. A glass-sealed thermistor is installed on the copper heat sink base.

2. The low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture as described in claim 1, characterized in that, The heat sink fixing assembly includes two clamping members and multiple fixing screws. The multiple fixing screws pass through the corresponding clamping members and are all tightened onto the aluminum profile heat sink. The clamping members are in contact with the copper heat sink.

3. The low-cost TO18 and TO38 packaged visible light laser with temperature-controlled testing fixture as described in claim 2, characterized in that... The clamping component includes a positioning block and a mating block. The copper heat sink has two mating grooves. Multiple fixing screws pass through the corresponding positioning blocks and are all tightened onto the aluminum profile heat sink. The mating block is fixedly connected to the positioning block and is located in the corresponding mating groove.

4. The low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture as described in claim 3, characterized in that, The laser fixing assembly includes a laser clamping plate and a rotating shaft limiting screw. The laser clamping plate is rotatably connected to the copper heat sink, and the rotating shaft limiting screw is used to fix the rotating shaft of the laser clamping plate.

5. The low-cost TO18 and TO38 packaged visible light laser with temperature control testing fixture as described in claim 4, characterized in that, The laser fixing assembly also includes a clamping plate locking lever and a locking release button. The clamping plate locking lever and the locking release button work together to lock or unlock the laser clamping plate.

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