Laser for realizing high-temperature self-protection based on temperature expansion effect

Abstract

The invention belongs to the technical field of laser, and particularly relates to a laser capable of realizing high-temperature self-protection based on a temperature expansion effect, which comprises a laser emission module, an optical module, a laser driving module, a temperature expansion effect assembly and a heat dissipation device, and is characterized in that the laser emission module is located at the initial part of the whole laser; the laser transmitting module comprises a pumping source, an input mirror, an output mirror and a laser gain crystal, the input mirror is located behind the pumping source, and the laser gain crystal is located behind the input mirror. The laser protection device has the advantages of automatic protection and efficient heat dissipation, temperature changes are automatically monitored through the temperature expansion effect assembly, when the temperature is too high, a power source is automatically cut off, cooling is started, the laser is prevented from being damaged by overheating, and automatic reset is achieved after the temperature recovers to the safety range. The system can be customized according to different working environments, a flexible protection scheme is provided, the service life of the laser is prolonged, energy consumption is reduced, and stable and safe operation of the laser in a high-temperature environment is ensured.

Description

Technical Field

[0001] The present invention relates to the field of laser technology, and specifically to a laser that achieves high-temperature self-protection based on the temperature expansion effect. Background Art

[0002] As an important light source device, lasers are widely used in multiple fields such as scientific research, industry, medical treatment, and communication. Since lasers generate a large amount of heat during operation, especially in the application scenarios of high-power lasers, excessive operating temperature may cause damage to the internal components of the laser, thereby affecting its performance and even leading to safety accidents. Therefore, temperature control and protection of lasers have always been key issues in technology research and development.

[0003] Existing laser protection technologies can be mainly divided into active cooling technologies and passive protection technologies.

[0004] Active cooling technologies remove the heat generated during the operation of the laser by introducing external cooling systems (such as fans, liquid cooling channels, etc.). These cooling systems usually adjust the cooling intensity by controlling the feedback of temperature sensors to ensure that the laser operates within a safe temperature range. To ensure the cooling effect, complex cooling devices such as fans, pumps, and pipes usually need to be equipped, and these components increase the volume and complexity of the system. Active cooling systems require regular maintenance and replacement of some components such as coolant and fans, and when the coolant leaks or the fan fails, it may cause the laser to overheat and affect its working performance. The operation of the cooling system consumes additional electrical energy, increasing the overall energy consumption of the laser.

[0005] Although active cooling technologies can effectively reduce the operating temperature of the laser, due to their complex structure, high maintenance costs, and large energy consumption, it is difficult to meet some application scenarios with strict requirements for volume, weight, and cost.

[0006] Passive protection technologies prevent damage caused by overheating by designing self-protection mechanisms inside the laser. Common methods include overheat protection switches, temperature sensors, and thermal power-off devices. These technologies can automatically cut off the power or enable protection measures when the operating temperature of the laser exceeds the safety threshold to avoid further damage. This technology uses components such as temperature sensors or bimetallic strips. When the temperature is too high, the trigger switch disconnects the circuit and stops the operation of the laser. However, the response speed of this protection mechanism at high temperatures is slow, and the laser needs to be restarted manually after the power is cut off, causing inconvenience.

[0007] Some lasers adopt a thermal fuse mechanism in their design, that is, when the temperature is too high, the fuse will melt and automatically disconnect the circuit. Although this method is simple and low-cost, once the fuse melts, it needs to be replaced, which is inconvenient to operate, and there may be a problem that the laser cannot resume operation in time when the power is cut off.

[0008] Modern lasers sometimes incorporate temperature sensors and automatic control systems for protection. When the temperature exceeds the set value, the system automatically cuts off the power supply to avoid overheating. Although such technologies are relatively reliable, their structures are complex, and external electronic control components are usually required to participate in the operation, increasing the volume and complexity of the system.

[0009] Therefore, we propose a laser that achieves high-temperature self-protection based on the temperature expansion effect to solve the above problems. Summary of the Invention

[0010] (I) Technical problems to be solved

[0011] In view of the deficiencies of the prior art, the present invention provides a laser that achieves high-temperature self-protection based on the temperature expansion effect, and solves the problems raised in the above background technology.

[0012] (II) Technical solutions

[0013] The present invention specifically adopts the following technical solutions to achieve the above objectives:

[0014] A laser that achieves high-temperature self-protection based on the temperature expansion effect, comprising a laser emission module, an optical module, a laser driving module, a temperature expansion effect component, and a heat dissipation device. The laser emission module is located at the starting part of the entire laser;

[0015] The laser emission module includes a pump source, an input mirror, an output mirror, and a laser gain crystal. The input mirror is located behind the pump source, the laser gain crystal is located behind the input mirror, and the output mirror is located behind the laser gain crystal;

[0016] The optical module is arranged behind the output mirror. The optical module includes a collimating mirror, a beam shaper, a focusing lens, and a beam expander. The collimating mirror is located behind the output mirror, the beam shaper is located behind the collimating mirror, the focusing lens is located behind the beam shaper; the beam expander is located behind the focusing lens;

[0017] The laser driving module includes a laser power supply, a current controller, and a laser modulator. The laser power supply is electrically connected to the current controller and the laser modulator;

[0018] The heat dissipation device includes a heat sink, a fan, and a liquid cooling component;

[0019] The temperature expansion effect component includes an expansion member, a housing, and a conductive component. The expansion member is installed in the housing, and the expansion member is fixedly connected to the conductive component;

[0020] The current controller is electrically connected to the pump source, the current controller is conductively connected in contact with the conductive component, and the expansion component is connected to the laser gain crystal of the laser through a heat-conducting metal wire.

[0021] Further, the pump source uses a laser diode LD, the input mirror uses a high-precision curved mirror, and the output mirror uses a semi-lens material.

[0022] Further, the laser gain crystal uses neodymium-doped yttrium aluminum garnet, and the collimating mirror uses a precision curved mirror.

[0023] Further, the beam shaper uses an array of lenses, the focusing lens uses a composite lens material, and the beam expander uses multiple lenses.

[0024] Further, the laser power supply uses an efficient switching power supply, the current controller uses a precision linear regulator, and the laser modulator uses a digital pulse width modulator.

[0025] Further, the heat sink uses an aluminum alloy material, the fan is an axial flow fan, and the liquid cooling component is a liquid cooling channel.

[0026] (III) Beneficial Effects

[0027] Compared with the prior art, the present invention provides a laser that realizes high-temperature self-protection based on the temperature expansion effect, and has the following beneficial effects:

[0028] The present invention has the advantages of automatic protection and efficient heat dissipation. The temperature change is automatically monitored through the temperature expansion effect component. When the temperature is too high, the power supply is automatically cut off and the cooling is started to avoid overheating damage to the laser, and it automatically resets after the temperature returns to the safe range. The system can be customized according to different working environments, providing a flexible protection scheme, extending the service life of the laser, reducing energy consumption, and ensuring the stable and safe operation of the laser in a high-temperature environment. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure of a laser that realizes high-temperature self-protection based on the temperature expansion effect of the present invention;

[0030] Figure 2 It is a schematic diagram of normal current operation before the expansion of the temperature expansion effect conductive component of the present invention;

[0031] Figure 3 It is a schematic diagram of current disconnection after the expansion of the temperature expansion effect conductive component of the present invention.

[0032] In the figure: 1. Laser emission module; 2. Pump source; 3. Input mirror; 4. Laser gain crystal; 5. Output mirror; 6. Optical module; 7. Collimating mirror; 8. Beam shaper; 9. Focusing lens; 10. Beam expander; 11. Laser drive module; 12. Current controller; 13. Laser modulator; 14. Laser power supply; 15. Temperature expansion effect component; 16. Expansion component; 17. Housing; 18. Conductive component; 19. Heat dissipation device; 20. Heat sink; 21. Liquid cooling component; 22. Fan. Detailed implementation manner

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment

[0035] As Figures 1 - 3 As shown, a laser that realizes high-temperature self-protection based on the temperature expansion effect proposed in an embodiment of the present invention includes a laser emission module 1, an optical module 6, a laser drive module 11, a temperature expansion effect component 15, and a heat dissipation device 19. The laser emission module 1 is located at the starting part of the entire laser.

[0036] The laser emission module 1 includes a pump source 2, an input mirror 3, an output mirror 5, and a laser gain crystal 4. The input mirror 3 is located behind the pump source 2, the laser gain crystal 4 is located behind the input mirror 3, and the output mirror 5 is located behind the laser gain crystal 4.

[0037] The optical module 6 is arranged behind the output mirror 5. The optical module 6 includes a collimating mirror 7, a beam shaper 8, a focusing lens 9, and a beam expander 10. The collimating mirror 7 is located behind the output mirror 5, the beam shaper 8 is located behind the collimating mirror 7, the focusing lens 9 is located behind the beam shaper 8, and the beam expander 10 is located behind the focusing lens 9. The focal length of the collimating mirror 7 is 25 mm, and the clear aperture is 50 mm, which converts the divergent laser beam into a parallel beam. The focal length of the focusing lens 9 is 100 mm, and the clear aperture is 25 mm, which further focuses the beam to the target area. The beam shaper 8 can adjust the spot diameter to be 0.5 - 5 mm and shape it into a rectangle, ellipse, or circle to ensure the uniformity or concentration of the laser damage effect.

[0038] The laser drive module 11 includes a laser power supply 14, a current controller 12, and a laser modulator 13. The laser power supply 14 is electrically connected to the current controller 12 and the laser modulator 13.

[0039] The heat dissipation device 19 includes a heat sink 20, a fan 22, and a liquid cooling component 21, which are responsible for the temperature control and heat dissipation of the laser, ensuring the stable operation of the laser within the normal operating temperature range;

[0040] The temperature expansion effect component 15 includes an expansion member 16, a housing 17, and a conductive component 18. The expansion member 16 is installed inside the housing 17, and the expansion member 16 is fixedly connected to the conductive component 18; the current controller 12 is electrically connected to the pump source 2, the current controller 12 is in conductive contact with the conductive component 18, the expansion member 16 is connected to the laser gain crystal 4 of the laser through a heat-conducting metal wire, the laser power supply 14 provides an adjustable voltage of 0 - 200V for the laser emission module 1, controls the current range to be 0 - 10A through the current controller 12, and controls the current fluctuation range within ±1%, ensuring the stable operation of the laser. The expansion member 16 has a high expansion coefficient and can physically expand as the temperature rises, thereby driving the conductive component 18 to displace, separating from the current controller 12, starting the power-off protection mechanism, immediately cutting off the power supply, and stopping the operation of the laser emission module 1. At the same time, the heat dissipation device 19 is started. The heat dissipation device 19 includes a liquid cooling component 21 and a fan 22. Through the circulating flow of the coolant and the air flow, the excess heat is quickly removed, reducing the temperature of the laser. The fan 22 accelerates the air flow and improves the heat dissipation efficiency, while the liquid cooling component 21 removes heat through the circulating coolant, ensuring that the laser is quickly cooled down to the safe range. The heat sink 20 further accelerates the conduction and dissipation of heat by increasing the heat exchange surface area.

[0041] When the temperature of the laser returns to the set safe range, the expansion member 16 in the temperature expansion effect component 15 returns to its original state, the conductive component 18 contacts and fits with the conductive end of the current controller 12, forming a circuit, and the power-off protection mechanism is released, enabling the laser to resume operation. At this time, the laser emission module 1 restarts and continues to work.

[0042] The laser modulator 13 is used to adjust the output power and pulse width of the laser.

[0043] In some embodiments, the pump source 2 uses a laser diode LD. This pump source 2 has excellent photoelectric conversion efficiency, a compact volume, and high reliability, and is suitable for medium and high-power laser systems. The input mirror 3 uses a high-precision curved mirror, which has precise beam focusing ability and can provide excellent beam quality in a high-precision laser system. The output mirror 5 uses a semi-lens material, which can effectively reflect and transmit the laser beam, ensuring stable output power. This design not only provides efficient laser reflection and transmission but also can effectively reduce heat accumulation in high-power lasers and improve the long-term stability of the system.

[0044] In some embodiments, the laser gain crystal 4 is made of neodymium-doped yttrium aluminum garnet, which has excellent high-power output and long-term stability. The broadband absorption and emission characteristics of neodymium-doped yttrium aluminum garnet enable it to provide high optical conversion efficiency. The collimating mirror 7 is a precision curved mirror, providing high-precision beam collimation ability, which can effectively reduce the divergence angle of the laser beam and ensure that the laser beam maintains high brightness and high energy density over a long distance.

[0045] In some embodiments, the beam shaper 8 uses an array of lenses to change the shape of the laser beam through precisely arranged optical lenses, thereby outputting a specific beam pattern. The focusing lens 9 uses a composite lens material, which is designed to effectively reduce aberration and provide high-precision laser focusing effect. The beam expander 10 uses multiple lenses to expand the beam diameter through a precisely designed lens combination, effectively improving the beam transmission efficiency, while avoiding excessive beam scattering and maintaining good beam quality.

[0046] In some embodiments, the laser power supply 14 uses a high-efficiency switching power supply, which can provide high-efficiency energy conversion and achieve high-power output in a smaller volume. It can effectively reduce the energy loss of the system and has high power density and low electromagnetic interference. The current controller 12 uses a precision linear regulator to provide high-precision current control to ensure that the laser maintains a stable output power during operation. The laser modulator 13 uses a digital pulse width modulator, which can achieve high-frequency and fine laser output modulation.

[0047] In some embodiments, the heat sink 20 is made of aluminum alloy material, the fan 22 is an axial flow fan, and the liquid cooling component 21 is a liquid cooling channel. The aluminum alloy heat sink 20 has excellent thermal conductivity. The axial flow fan has a compact structure, low noise and low cost. The liquid cooling component 21 provides a more efficient heat transfer ability, which is especially suitable for laser systems with long-term high-power operation to ensure equipment stability.

[0048] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser that achieves high-temperature self-protection based on the temperature expansion effect, characterized in that: It includes a laser emission module (1), an optical module (6), a laser drive module (11), a temperature expansion effect component (15), and a heat dissipation device (19). The laser emission module (1) is located at the starting part of the entire laser. The laser emission module (1) includes a pump source (2), an input mirror (3), an output mirror (5), and a laser gain crystal (4). The input mirror (3) is located behind the pump source (2), the laser gain crystal (4) is located behind the input mirror (3), and the output mirror (5) is located behind the laser gain crystal (4). The optical module (6) is arranged behind the output mirror (5). The optical module (6) includes a collimating mirror (7), a beam shaper (8), a focusing lens (9), and a beam expander (10). The collimating mirror (7) is located behind the output mirror (5), the beam shaper (8) is located behind the collimating mirror (7), the focusing lens (9) is located behind the beam shaper (8), and the beam expander (10) is located behind the focusing lens (9). The laser drive module (11) includes a laser power supply (14), a current controller (12), and a laser modulator (13). The laser power supply (14) is electrically connected to the current controller (12) and the laser modulator (13). The heat dissipation device (19) includes a heat sink (20), a fan (22), and a liquid cooling component (21). The temperature expansion effect component (15) includes an expansion part (16), a housing (17), and a conductive component (18). The expansion part (16) is installed in the housing (17), and the expansion part (16) is fixedly connected to the conductive component (18). The current controller (12) is electrically connected to the pump source (2), and the current controller (12) is in conductive contact with the conductive component (18). The expansion part (16) is connected to the laser gain crystal (4) of the laser through a heat-conducting metal wire.

2. The laser for realizing high-temperature self-protection based on the temperature expansion effect according to claim 1, wherein: The pump source (2) uses a laser diode (LD), the input mirror (3) uses a high-precision curved mirror, and the output mirror (5) uses a semi-lens material.

3. A laser that achieves high-temperature self-protection based on the temperature expansion effect according to claim 1, characterized in that: The laser gain crystal (4) uses neodymium-doped yttrium aluminum garnet, and the collimating mirror (7) uses a precision curved mirror.

4. A laser that achieves high-temperature self-protection based on the temperature expansion effect according to claim 1, characterized in that: The beam shaper (8) uses an array of lenses, the focusing lens (9) uses a composite lens material, and the beam expander (10) uses multiple lenses.

5. A laser that achieves high-temperature self-protection based on the temperature expansion effect according to claim 1, characterized in that: The laser power supply (14) uses a high-efficiency switching power supply, the current controller (12) uses a precision linear regulator, and the laser modulator (13) uses a digital pulse width modulator.

6. The laser for realizing high-temperature self-protection based on the temperature expansion effect according to claim 1, wherein: The heat sink (20) uses an aluminum alloy material, the fan (22) is an axial flow fan, and the liquid cooling component (21) is a liquid cooling channel.

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