Light path system of solid laser and solid laser

Abstract

The invention relates to a light path system of a solid laser and the solid laser, the light path system of the solid laser comprises a pumping source, a first plane mirror, a working crystal, a second plane mirror, a third plane mirror, a Q-switched crystal, a plano-convex mirror, a light emitting mirror module and a light emitting lens cone, the pumping source is used for emitting 808nm light, the working crystal is used for converting 808nm light into 1064nm light, and the Q-switched crystal is used for compressing pulse width; pump light emitted by the pumping source is transmitted to the plano-convex reflector through the first plane reflector, the second plane reflector and the third plane reflector in sequence, and the pump light is reflected by the plano-convex reflector and then is transmitted to the light emitting reflector module through the third plane reflector, the second plane reflector and the first plane reflector in sequence to form laser resonance. After resonance, the laser is emitted from the light-emitting lens barrel, the pump light can be amplified and multiplied more effectively, the laser output power is higher, and the machining requirement is met.

Description

Technical Field

[0001] The present application relates to the field of lasers, and in particular, to an optical path system of a solid-state laser and a solid-state laser. Background Art

[0002] Lasers are devices that can generate laser light based on stimulated emission of radiation. They have important applications in many fields. As the requirements for processing quality and efficiency in various industries continue to increase, people have put forward higher requirements for solid-state lasers.

[0003] Generally, solid-state lasers emit light through a pump source, which is then amplified and multiplied and then emitted. The amplification factor is limited. In addition, the pulse width is also limited, which leads to certain limitations in the actual application of lasers and cannot meet the needs of more precise and faster processing and micro-processing. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an optical path system and a solid-state laser for a solid-state laser, so as to solve the problem that the existing lasers are difficult to meet the requirements of more precise and faster processing and micro-processing.

[0005] In order to solve the above problems, the present application adopts the following technical solutions:

[0006] The present application provides an optical path system of a solid-state laser, comprising: a pump source, a first plane reflector, a working crystal, a second plane reflector, a third plane reflector, a Q-switched crystal, a plano-convex reflector, a light-emitting reflector module and a light-emitting mirror barrel, wherein the pump source is used to emit 808nm light, the working crystal is used to convert the 808nm light into 1064nm, and the Q-switched crystal is used to compress the pulse width; wherein the pump light emitted by the pump source is sequentially transmitted to the plano-convex reflector through the first plane reflector, the second plane reflector, and the third plane reflector, and after being reflected from the plano-convex reflector, the pump light is sequentially transmitted to the light-emitting reflector module through the third plane reflector, the second plane reflector, and the first plane reflector to form laser resonance, and the laser after laser resonance is emitted from the light-emitting mirror barrel.

[0007] Furthermore, the light-emitting reflector module includes a fourth plane reflector, a fifth plane reflector, a sixth plane reflector and a seventh plane reflector. The pump light reflected from the plano-convex reflector passes through the third plane reflector, the second plane reflector, the first plane reflector, the fourth plane reflector, the fifth plane reflector, the sixth plane reflector and the seventh plane reflector in sequence, and is transmitted to the light-emitting mirror barrel.

[0008] Furthermore, the light emitting reflector module comprises a first aperture and a second aperture, wherein the first aperture is located between the fifth plane reflector and the sixth plane reflector, and the second aperture is located between the seventh plane reflector and the light emitting lens barrel.

[0009] Furthermore, the first aperture and the second aperture are of the same model.

[0010] Furthermore, the second plane reflector, the third plane reflector, the fourth plane reflector and the fifth plane reflector are of the same model.

[0011] Furthermore, the first plane reflector is a plane reflector that highly reflects 1064nm light and resists reflecting 808nm light.

[0012] Furthermore, the plano-convex reflector is a plano-convex mirror that highly reflects 1064nm light.

[0013] Furthermore, the optical path system is provided with a collimating and focusing lens barrel, and the collimating and focusing lens barrel is used to collimate and focus the pump light emitted by the pump source.

[0014] The present application also provides a solid-state laser, comprising an optical path system of any of the solid-state lasers described above.

[0015] Compared with the prior art, the beneficial effects of the present application are: by adopting an optical path system with multi-plane reflectors, the pump light can be more effectively amplified and multiplied in the working crystal, so that the laser output power is higher. By using Q-switched crystals, the pulse width can be compressed to meet the needs of more sophisticated and faster processing; by optimizing the optical path system, the loss of pump light during transmission is reduced, the energy conversion efficiency of the laser is improved, thereby reducing energy consumption and improving the efficiency of equipment use. The use of plano-convex reflectors and light-emitting reflector modules can make the light transmission during the laser resonance process more stable, thereby improving the overall stability of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of an optical path of an optical path system of a solid-state laser provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the structure of a solid-state laser provided in an embodiment of the present application.

[0018] Description of reference numerals:

[0019] 10. Pump source; 20. First plane reflector; 30. Working crystal; 40. Second plane reflector; 50. Third plane reflector; 60. Q-switched crystal; 70. Plano-convex reflector;

[0020] 80. Light-emitting reflector module; 81. Fourth plane reflector; 82. Fifth plane reflector; 83. Sixth plane reflector; 84. Seventh plane reflector; 85. First aperture; 86. Second aperture; 87. Light combiner; 90. Light-emitting lens barrel; 100. Collimating and focusing lens barrel. DETAILED DESCRIPTION

[0021] The specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0023] It should be understood that the orientation or position relationship is the orientation or position relationship described based on the drawings. These orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0024] like Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of an optical path of an optical path system of a solid-state laser provided in an embodiment of the present application, Figure 2 The present invention is a structural schematic diagram of a solid-state laser provided in an embodiment of the present application. The embodiment of the present application provides an optical path system of a solid-state laser, including: a pump source 10, a first plane reflector 20, a working crystal 30, a second plane reflector 40, a third plane reflector 50, a Q-switched crystal 60, a plano-convex reflector 70, a light-emitting reflector module 80 and a light-emitting lens barrel 90. The pump source 10 is used to emit 808nm light, the working crystal 30 is used to convert 808nm light into 1064nm, and the Q-switched crystal 60 is used to compress the pulse width; wherein, the pump light emitted by the pump source 10 is transmitted to the plano-convex reflector 70 through the first plane reflector 20, the second plane reflector 40, and the third plane reflector 50 in sequence, and the pump light is reflected from the plano-convex reflector 70 and then transmitted to the light-emitting reflector module 80 through the third plane reflector 50, the second plane reflector 40, and the first plane reflector 20 in sequence to form laser resonance, and the laser is emitted from the light-emitting lens barrel 90 after resonance.

[0025] Specifically, the pump source 10 emits 808nm pump light, the first plane reflector 20 uses a high-reflectivity coated lens to ensure that the pump light can be efficiently reflected, and the second plane reflector 40 and the third plane reflector 50 both use high-reflectivity coated lenses to form a total reflection of the light path to enhance the resonance of the laser. The working crystal 30 uses Nd:YAG (neodymium-doped yttrium aluminum garnet) crystal as the working medium, which can effectively convert 808nm light into 1064nm laser. The Q-switched crystal 60 is used to modulate the width of the laser pulse to achieve ultra-short pulse laser output; the Q-switched crystal 60 uses a KTP crystal, which can tune the high-power laser. It should be noted that the tuning process refers to changing the output wavelength of the laser by changing the characteristics or parameters of certain components inside the laser. For example, by changing the temperature or pressure of the Q-switched crystal 60, the frequency of the laser is controlled, thereby adjusting the wavelength of the output laser. The plano-convex reflector 70 uses a polished high-quality plano-convex reflector to collect and focus the 1064nm laser emitted from the working crystal 30. The light-emitting reflector module 80 is composed of multiple groups of reflectors. The light-emitting lens barrel 90 provides a smooth, lossless transmission path for the laser beam, ensuring the output quality and stability of the laser beam.

[0026] The 808nm light emitted by the pump source 10 passes through the first plane reflector 20, the second plane reflector 40, the third plane reflector 50 and the working crystal 30. In the working crystal, the 808nm light is amplified and converted into 1064nm laser through stimulated radiation. The laser is then compressed by the plano-convex reflector 70 and the Q-switched crystal 60 to form a high-quality ultra-short pulse laser. The resonated laser is transmitted to the light-emitting mirror tube 90 under the action of the light-emitting mirror module 80 and finally emitted from the laser.

[0027] In particular, the plano-convex reflector 70 is a plano-convex mirror with high reflection of 1064nm light, which improves the reflectivity of 1064nm light in the laser resonant cavity, thereby improving the resonance efficiency and output power of the laser, and improving the applicability and efficiency of laser processing. The first plane reflector 20 is a plane reflector with high reflection of 1064nm light and anti-reflection of 808nm light. By using a plane reflector with high reflection of 1064nm light and anti-reflection of 808nm light as the first plane reflector 20, the reflectivity of 1064nm light in the laser resonant cavity can be effectively improved, while reducing the reflection of 808nm light, improving the resonance efficiency and output power of the laser, reducing non-resonance light loss, and helping to improve the applicability and efficiency of laser processing.

[0028] By adopting the optical path system of multi-plane reflectors, the pump light can be more effectively amplified and multiplied in the working crystal, so that the laser output power is higher. The Q-switched crystal 60 compresses the pulse width, so that the laser can meet the needs of more precise and faster processing and micro-processing in practical applications, and improve the stability and efficiency of the laser.

[0029] In some embodiments, the light-emitting reflector module 80 includes a fourth plane reflector 81, a fifth plane reflector 82, a sixth plane reflector 83 and a seventh plane reflector 84. The pump light reflected from the plano-convex reflector 70 passes through the third plane reflector 50, the second plane reflector 40, the first plane reflector 20, the fourth plane reflector 81, the fifth plane reflector 82, the sixth plane reflector 83 and the seventh plane reflector 84 in sequence, and is transmitted to the light-emitting lens barrel 90.

[0030] Specifically, the pump light reflected by the plano-convex reflector 70 passes through the third plane reflector 50, the second plane reflector 40 and the first plane reflector 20 in sequence, and the pump light is guided to the fourth plane reflector 81, so that it is reflected on the fourth plane reflector 81. After being reflected by the fourth plane reflector 81 to the fifth plane reflector 82, the pump light passes through the light combiner 87, the sixth plane reflector 83 and the seventh plane reflector 84 in sequence, and is transmitted to the light output lens barrel 90.

[0031] For example, the first plane reflector 20 is used for high reflection of 1064nm and suppression of 808nm light, the first plane reflector 20 is used for high reflection of 1064nm or high reflection of 808nm light, the plano-convex reflector 70 is used for high reflection of 1064nm light, and the sixth plane reflector 83 is used for high reflection of 532nm and suppression of 1064nm light, thereby finally outputting 532nm laser.

[0032] Through the multiple plane mirrors in the light output mirror module, the pump light is reflected and amplified more in the resonant cavity, thereby enhancing the laser resonance effect, increasing the laser output power, and further improving the beam quality of the laser.

[0033] In some embodiments, the light emitting reflector module 80 includes a first aperture 85 and a second aperture 86 . The first aperture 85 is located between the fifth plane reflector 82 and the sixth plane reflector 83 , and the second aperture 86 is located between the seventh plane reflector 84 and the light emitting lens barrel 90 .

[0034] Specifically, the light-emitting reflector module 80 includes two apertures, namely a first aperture 85 and a second aperture 86. Both apertures are configured to be on the light path. The first aperture 85 is located between the fifth plane reflector 82 and the sixth plane reflector 83, and the light spot is shaped by the first aperture 85. The second aperture 86 is located between the seventh plane reflector 84 and the light-emitting lens barrel 90, and the second aperture 86 further shapes the light spot. Among them, the fifth plane reflector 82 and the sixth plane reflector 83 can be made of a mirror with high reflectivity combined with a coating to maximize the reflection of the incident light. In particular, the first aperture 85 and the second aperture 86 are of the same model. Since the performance parameters of the two apertures are exactly the same, consistent beam limitation and control are provided during the entire laser resonance process, thereby improving system stability and improving the reliability of the equipment.

[0035] By setting the first aperture 85 and the second aperture 86, the size of the laser beam can be accurately controlled during the laser resonance process, the light spot can be effectively shaped, the laser beam distribution can be optimized, and stray light and scattering can be reduced, thereby improving the accuracy and quality of laser processing.

[0036] In some embodiments, the second plane reflector 40, the third plane reflector 50, the fourth plane reflector 81 and the fifth plane reflector 82 are of the same model. For example, the second plane reflector 40, the third plane reflector 50, the fourth plane reflector 81 and the fifth plane reflector 82 are all of the same model for HR1064 or HR532nm. Since the second, third, fourth and fifth plane reflectors are of the same model, the performance parameters of the reflectors are the same, thereby providing consistent optical performance in the entire laser resonance system, enhancing system stability and optimizing laser beam quality.

[0037] In particular, the first plane reflector 20 is used for HR1064nm and AR808nm; the second plane reflector 40, the third plane reflector 50, the fourth plane reflector 81, and the fifth plane reflector 82 are all used for HR1064 or 532nm; the plano-convex reflector 70 is used for HR1064nm; the sixth plane reflector 83 and the seventh plane reflector 84 are both used for HR532nm and AR1064nm; the Q-switched crystal 60 is used to compress the pulse width; and the working crystal 30 converts 808nm into 1064nm. Among them, HR1064nm indicates that the reflector has a high reflectance (High Reflectance) for the laser with a wavelength of 1064nm. When the laser with a wavelength of 1064nm is irradiated on this reflector, most of the light will be reflected back instead of passing through the reflector. AR808nm indicates that the reflector has high transmittance (Anti-Reflection) for 808nm wavelength laser. When 808nm laser irradiates this reflector, the reflector will let most of the light pass through, reducing the reflection loss of light. Similarly, HR532nm and AR1064nm refer to the above characteristics.

[0038] In some embodiments, the optical path system is provided with a collimating and focusing lens barrel 100 , and the collimating and focusing lens barrel 100 is used to collimate and focus the pump light emitted by the pump source 10 .

[0039] Specifically, the collimating and focusing lens barrel 100 is used to accurately collimate and focus the pump light emitted by the pump source 10, improve the utilization efficiency and output power of light energy, and ensure that a high-quality light beam is obtained in the target area. The collimating and focusing lens barrel 100 allows the pump light to propagate along a specific path, and parallelizes the pump light beam through its internal collimation function, removes unnecessary divergence and scattering, thereby reducing energy loss. For example, the collimating and focusing lens barrel 100 can be made of glass or plastic materials with high optical quality, and may include special optical coatings to reduce reflection and scattering of optical surfaces.

[0040] It should be noted that in order to improve the stability and reliability of the system, the collimating and focusing lens barrel 100 can also be installed in a stable mechanical structure. For example, the collimating and focusing lens barrel 100 is fixed on the housing of the solid laser, so that it can resist the influence of external environmental factors (such as temperature changes, vibrations, etc.) and ensure accurate focusing and collimation of the pump light.

[0041] By providing the collimating and focusing lens barrel 100, the pump light emitted by the pump source can be effectively collimated, so that the light beam maintains good straight-line propagation during the propagation process, reduces light beam diffusion and energy loss, enhances the focusing effect, and enhances the laser efficiency.

[0042] The present application also provides a solid-state laser, comprising an optical path system of any of the solid-state lasers described above.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the same. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein 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 claimed to be protected by the present application.

Claims

1. An optical path system of a solid-state laser, characterized in that: include: A pump source, a first plane reflector, a working crystal, a second plane reflector, a third plane reflector, a Q-switched crystal, a plano-convex reflector, a light-emitting reflector module and a light-emitting mirror barrel, wherein the pump source is used to emit pump light, the working crystal is used to convert 808nm light into 1064nm, and the Q-switched crystal is used to compress pulse width; wherein the pump light emitted by the pump source is sequentially transmitted to the plano-convex reflector through the first plane reflector, the second plane reflector, and the third plane reflector, and after being reflected from the plano-convex reflector, the pump light is sequentially transmitted to the light-emitting reflector module through the third plane reflector, the second plane reflector, and the first plane reflector to form laser resonance, and the laser after laser resonance is emitted from the light-emitting mirror barrel.

2. The optical path system of a solid-state laser according to claim 1, characterized in that: The light-emitting reflector module comprises a fourth plane reflector, a fifth plane reflector, a sixth plane reflector and a seventh plane reflector. The pump light reflected from the plano-convex reflector passes through the third plane reflector, the second plane reflector, the first plane reflector, the fourth plane reflector, the fifth plane reflector, the sixth plane reflector and the seventh plane reflector in sequence, and is transmitted to the light-emitting mirror barrel.

3. The optical path system of a solid-state laser according to claim 2, characterized in that: The light-emitting reflector module comprises a first aperture and a second aperture, wherein the first aperture is located between the fifth plane reflector and the sixth plane reflector, and the second aperture is located between the seventh plane reflector and the light-emitting lens barrel.

4. The optical path system of a solid-state laser according to claim 3, characterized in that: The first aperture and the second aperture are of the same model.

5. The optical path system of a solid-state laser according to claim 2, characterized in that: The second plane reflector, the third plane reflector, the fourth plane reflector and the fifth plane reflector are of the same model.

6. The optical path system of a solid-state laser according to claim 1, characterized in that: The first plane reflector is a plane reflector that highly reflects 1064 nm light and resists reflecting 808 nm light.

7. The optical path system of a solid-state laser according to claim 1, characterized in that: The plano-convex reflector is a plano-convex mirror that highly reflects 1064 nm light.

8. The optical path system of a solid-state laser according to claim 1, characterized in that: The optical path system is provided with a collimating and focusing lens barrel, and the collimating and focusing lens barrel is used to collimate and focus the pump light emitted by the pump source.

9. A solid-state laser, characterized in that: An optical path system comprising a solid-state laser as claimed in any one of claims 1 to 8.

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