A 1319nm laser based on a torsional cavity and slat configuration

Abstract

This invention discloses a 1319nm laser based on a torsional cavity and slat configuration, belonging to the field of solid-state laser technology. It includes an oscillator stage, a preamplifier, a first-stage main amplifier, and a second-stage main amplifier placed sequentially. The oscillator stage generates a narrow-linewidth pulsed laser in the μJ range and outputs it to the preamplifier. The preamplifier amplifies the incident narrow-linewidth pulsed laser to the mJ range and outputs it to the first-stage main amplifier. The first-stage main amplifier amplifies the incident narrow-linewidth pulsed laser to the tens of mJ range and outputs it to the second-stage main amplifier. The second-stage main amplifier amplifies the incident narrow-linewidth pulsed laser to the hundreds of mJ range. This invention provides a narrow-linewidth pulsed laser with excellent beam quality, which can be widely used in the field of lidar detection.

Description

Technical Field

[0001] This invention belongs to the field of solid-state laser technology, specifically relating to a 1319nm laser based on a torsional cavity and slat configuration. Background Technology

[0002] In high-precision spectroscopic applications such as ozone lidar detection and sodium guide star atmospheric detection, single-mode lasers in the 1319 nm band have attracted widespread attention. However, existing technologies still face challenges such as poor single-mode stability, low pulse energy, and complex structures. Although traditional single-mode techniques, such as non-planar ring cavities, can output single-frequency lasers, their output power is typically limited to the hundreds of milliwatts. Other methods capable of outputting single-mode lasers, such as birefringent filter methods, Fabry-Perot (FP) etalon methods, and short-range absorption methods, generally limit their output power to the watt level. Furthermore, the stimulated emission cross-section in the 1319 nm band is relatively small, only one-third that of the conventional wavelength of 1064 nm. Therefore, how to simultaneously achieve a compact 1319 nm single-frequency laser with good single-frequency characteristics, high energy, and excellent beam quality has become a crucial problem that urgently needs to be solved in the field of lidar detection. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0004] A 1319nm laser based on a torsional cavity and slat configuration includes: an oscillator stage, a preamplifier, a first-stage main amplifier, and a second-stage main amplifier arranged sequentially. The oscillator stage generates a narrow-linewidth pulsed laser in the μJ range and outputs it to the preamplifier. The preamplifier amplifies the incident narrow-linewidth pulsed laser to the mJ range and outputs it to the first-stage main amplifier. The first-stage main amplifier amplifies the incident narrow-linewidth pulsed laser to the tens of mJ range and outputs it to the second-stage main amplifier. The second-stage main amplifier amplifies the incident narrow-linewidth pulsed laser to the hundreds of mJ range.

[0005] The oscillation stage is based on a torsional cavity configuration and outputs a narrow linewidth pulsed laser in the μJ range through active electro-optic Q-switching of the oscillator;

[0006] The preamplifier is based on a slab laser crystal and uses a single-end-face pumping method to amplify the oscillating μJ-level narrow-linewidth pulsed laser to the mJ level.

[0007] The first-stage main amplifier is based on a slab laser crystal and uses a dual-end-face pumping method to amplify the mJ-level narrow-linewidth pulsed laser incident by the preamplifier to the tens of mJ level.

[0008] The second-stage main amplifier is based on a slab laser crystal and uses a dual-end-face pumping method to amplify the narrow-linewidth pulsed laser of tens of mJ incident on the first-stage main amplifier to hundreds of mJ.

[0009] The present invention has the following beneficial effects:

[0010] This invention provides a 1319nm laser based on a torsional cavity and slat configuration. The system outputs a single pulse energy of about 200mJ and a repetition frequency of about 100Hz. It is a narrow-linewidth pulse laser with a compact structure and excellent beam quality, which can be widely used in the field of lidar detection.

[0011] This invention eliminates the spatial hole-burning effect of the oscillation stage by introducing torsional cavity technology, ensuring that the field intensity of the 1319nm Nd:YAG laser is uniformly distributed along the optical axis in the resonant cavity, suppressing multi-longitudinal mode oscillation from a physical mechanism, and realizing high-purity single-longitudinal mode output.

[0012] This invention employs a rational coating design: a 1319nm total reflection mirror 15 is coated with a 1319nm total reflection film, along with high-transmittance films at 1064nm and 1338nm. Similarly, the 1319nm partially reflective and partially transmissive output mirror 17 is coated with a 1319nm partially reflective and partially transmissive film, also with high-transmittance films at 1064nm and 1338nm. This effectively suppresses oscillations of competing wavelengths like 1064nm and 1338nm in the oscillation stage, ensuring the laser outputs only a single-frequency 1319nm pulsed laser. Furthermore, the rational coating design in the amplification stage also effectively suppresses spontaneous emission amplification in the 1064nm band during amplification, significantly improving energy extraction efficiency.

[0013] The slab laser amplification module used in this invention has the advantage of a one-dimensional thermal lens and is equipped with liquid cooling technology for efficient and uniform heat dissipation, avoiding the beam quality degradation caused by thermal distortion in traditional rod-shaped laser crystals. More importantly, the laser amplifiers are all designed based on the principle of spherical aberration self-compensation. This invention adopts a multi-pass amplification beam structure to actively compensate for the thermal aberrations generated by the slab laser crystal during amplification, thereby effectively ensuring high beam quality while improving output energy.

[0014] By introducing a reasonable arrangement and configuration of optical components and combining it with the above-mentioned optical design methods, this invention can overcome the problem of incompatibility between high power and single-frequency characteristics, while ensuring that the laser structure is compact, highly stable, and easy to apply in engineering, especially suitable for fields such as lidar detection. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the 1319nm laser based on a torsional cavity and slab configuration according to the present invention. In the diagram, 01-oscillation stage, 02-preamplifier, 03-first-stage main amplifier, 04-second-stage main amplifier, 05-first fiber pump source, 06-first fiber pump shaping module, 07-first reflector, 08-oscillation stage laser crystal, 09-second reflector, 10-second fiber pump shaping module, 11-second fiber pump source, 12-electro-optic Q-switching crystal, 13-first quarter-wave plate, 14-thin-film polarizer, 15-1319nm total reflection mirror, 16-second quarter-wave plate, 17-1319nm partial reflection / partial transmission output mirror, 18-third quarter-wave plate, 19-third reflector, 20-first slab laser amplification module, 21-first amplifier cavity mirror, 22-second amplifier cavity mirror, 23-third amplifier cavity mirror, 2 4-Fourth amplifier cavity mirror, 25-First amplifier pump shaping module, 26-First amplifier pump source, 27-Second slab laser amplification module, 28-Fifth amplifier cavity mirror, 29-Third amplifier pump shaping module, 30-Second amplifier pump source, 31-Sixth amplifier cavity mirror, 32-Second amplifier pump shaping module, 33-Third amplifier pump source, 34-Seventh amplifier cavity mirror, 35-Fourth reflecting mirror, 36-Eighth amplifier cavity mirror, 37-Fifth reflecting mirror, 38-Sixth reflecting mirror, 39-Seventh reflecting mirror, 40-Fourth amplifier pump shaping module, 41-Fourth amplifier pump source, 42-Ninth amplifier cavity mirror, 43-Fifth amplifier pump shaping module, 44-Fifth amplifier pump source, 45-Tenth amplifier cavity mirror, 46-Eleventh amplifier cavity mirror, 47-Third slab laser amplification module, 48-Twelfth amplifier cavity mirror. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0017] like Figure 1 As shown, the 1319nm laser based on a torsional cavity and slat configuration of the present invention includes: an oscillator stage 01, a preamplifier 02, a first-stage main amplifier 03, and a second-stage main amplifier 04 arranged sequentially.

[0018] The oscillation stage 01 generates a narrow linewidth pulsed laser in the μJ range and outputs it to the preamplifier 02. The preamplifier 02 amplifies the incident narrow linewidth pulsed laser to the mJ range with a repetition frequency of 100Hz and outputs it to the first-stage main amplifier 03. The first-stage main amplifier 03 amplifies the incident narrow linewidth pulsed laser to the tens of mJ range and outputs it to the second-stage main amplifier 04. The second-stage main amplifier 04 amplifies the incident narrow linewidth pulsed laser to the hundreds of mJ range.

[0019] The oscillator stage 01 is based on a torsional cavity configuration and outputs a narrow linewidth pulse laser in the μJ range through active electro-optic Q-switching of the oscillator 01.

[0020] The preamplifier 02 is based on a slab laser crystal and uses a single-end-face pumping method to amplify the oscillating μJ-level narrow-linewidth pulsed laser to the mJ level.

[0021] The first-stage main amplifier 03 is based on a slab laser crystal and uses a dual-end-face pumping method to amplify the mJ-level narrow-linewidth pulsed laser incident by the preamplifier 02 to the tens of mJ level.

[0022] The second-stage main amplifier 04 is based on a slab laser crystal and uses a dual-end-face pumping method to amplify the narrow-linewidth pulsed laser of tens of mJ incident on the first-stage main amplifier 03 to the hundreds of mJ level.

[0023] The oscillation stage 01 includes: a first fiber pump source 05, a first fiber pump shaping module 06, a first reflector 07, an oscillation stage laser crystal 08, a second reflector 09, a second fiber pump shaping module 10, a second fiber pump source 11, an electro-optic Q-switched crystal 12, a first quarter-wave plate 13, a thin-film polarizer 14, a 1319nm total internal reflection mirror 15, a second quarter-wave plate 16, a 1319nm partial reflection / partial transmission output mirror 17, and a third quarter-wave plate 18. The connection relationships of each component are as follows:

[0024] The first fiber pump source 05 and the second fiber pump source 11 are used to pump the oscillating laser crystal 08, with a center wavelength of 808nm and a fiber core diameter of 400μm.

[0025] Pump light emitted from the first fiber pump source 05 and the second fiber pump source 11 is shaped by the first fiber pump shaping module 06 and the second fiber pump shaping module 10, respectively, and then injected into the pump oscillator stage laser crystal 08 after passing through the first reflector 07 and the second reflector 09, respectively. The second quarter-wave plate 16 and the third quarter-wave plate 18 form a torsional mode cavity configuration for outputting single longitudinal mode laser. The first quarter-wave plate 13, the electro-optic Q-switching crystal 12, and the thin-film polarizer 14 together form an active electro-optic Q-switching, so that the output single longitudinal mode laser is pulsed. The 1319nm total reflection mirror 15 and the 1319nm partial reflection and partial transmission output mirror 17 form the oscillator stage cavity mirror.

[0026] Electro-optic Q-switched crystal 12 is a KD P (a type of conventional electro-optic Q-switched crystal) is used to modulate continuous light into pulsed light.

[0027] The thin-film polarizer 14 is used to ensure that the output laser is linearly polarized.

[0028] The preamplifier 02 includes: a third reflecting mirror 19, a first slab laser amplification module 20, a first amplifier cavity mirror 21, a second amplifier cavity mirror 22, a third amplifier cavity mirror 23, a fourth amplifier cavity mirror 24, a first amplifier pump shaping module 25, and a first amplifier pump source 26. The connection relationships of each component are as follows:

[0029] The third reflector 19 is used to reflect the laser output from the oscillator 01 into the preamplifier 02.

[0030] The first amplifier pump source 26 is used to pump the first slab laser amplification module 20. The center wavelength of the pump source is 808nm and the operating temperature of the pump source is 25℃.

[0031] The first amplifier pump shaping module 25 is used to shape the 808nm band laser emitted by the first amplifier pump source 26 into a pump spot that matches the size of the first slab laser amplification module 20.

[0032] The first amplifier cavity mirror 21, the second amplifier cavity mirror 22, the third amplifier cavity mirror 23, and the fourth amplifier cavity mirror 24 together form the amplification stage cavity mirror of the preamplifier 02. The first amplifier cavity mirror 21 simultaneously reflects the laser output from the oscillation stage 01 to the preamplifier 02, and the third amplifier cavity mirror 23 simultaneously reflects the laser output from the preamplifier 02 after amplification to the first-stage main amplifier 03.

[0033] The first-stage main amplifier 03 includes: a second slab laser amplification module 27, a fifth amplifier cavity mirror 28, a third amplifier pump shaping module 29, a second amplifier pump source 30, a sixth amplifier cavity mirror 31, a second amplifier pump shaping module 32, a third amplifier pump source 33, a seventh amplifier cavity mirror 34, a fourth reflector 35, an eighth amplifier cavity mirror 36, a fifth reflector 37, a sixth reflector 38, and a seventh reflector 39. The connection relationships of each component are as follows:

[0034] The second amplifier pump source 30 and the third amplifier pump source 33 are both used to pump the second slab laser amplification module 27. The center wavelength of the pump source is 808nm and the operating temperature of the pump source is 25℃.

[0035] The third amplifier pump shaping module 29 and the second amplifier pump shaping module 32 are used to shape the 808nm band laser emitted by the second amplifier pump source 30 and the third amplifier pump source 33 into a pump spot that matches the size of the second slab laser amplification module 27, respectively.

[0036] The fifth amplifier cavity mirror 28, the sixth amplifier cavity mirror 31, the seventh amplifier cavity mirror 34, and the eighth amplifier cavity mirror 36 together form the amplification stage cavity mirror of the first-stage main amplifier 03.

[0037] The light amplified by the first-stage main amplifier 03 is reflected sequentially by the fourth reflector 35, the fifth reflector 37, the sixth reflector 38, and the seventh reflector 39 to the second-stage main amplifier 04.

[0038] The second-stage main amplifier 04 includes: a fourth amplifier pump shaping module 40, a fourth amplifier pump source 41, a ninth amplifier cavity mirror 42, a fifth amplifier pump shaping module 43, a fifth amplifier pump source 44, a tenth amplifier cavity mirror 45, an eleventh amplifier cavity mirror 46, a third slab laser amplification module 47, and a twelfth amplifier cavity mirror 48. The connection relationships of each component are as follows:

[0039] The fourth amplifier pump source 41 and the fifth amplifier pump source 44 are both used to pump the third slab laser amplification module 47, with a center wavelength of 808nm and a pump source operating temperature of 25℃.

[0040] The fourth amplifier pump shaping module 40 and the fifth amplifier pump shaping module 43 are used to shape the 808nm band laser emitted by the fourth amplifier pump source 41 and the fifth amplifier pump source 44 into a pump spot that matches the size of the third slab laser amplification module 47, respectively.

[0041] The ninth amplifier cavity mirror 42, the tenth amplifier cavity mirror 45, the eleventh amplifier cavity mirror 46, and the twelfth amplifier cavity mirror 48 together form the amplification stage cavity mirror of the second-stage main amplifier 04. Finally, the ninth amplifier cavity mirror 42 outputs 1319nm laser in the hundreds of mJ range.

[0042] The first amplifier pump source 26, the second amplifier pump source 30, the third amplifier pump source 33, the fourth amplifier pump source 41, and the fifth amplifier pump source 44 are all water-cooled stacked array diodes with a center wavelength of 808nm.

[0043] The first amplifier pump shaping module 25, the third amplifier pump shaping module 29, the second amplifier pump shaping module 32, the fourth amplifier pump shaping module 40, and the fifth amplifier pump shaping module 43 are respectively used for pump shaping of the first amplifier pump source 26, the second amplifier pump source 30, the third amplifier pump source 33, the fourth amplifier pump source 41, and the fifth amplifier pump source 44.

[0044] The laser crystal of the oscillator-level laser crystal 08 is made of Nd:YAG with a doping concentration of 0.7 at.%. <111> Cutting method.

[0045] The laser crystals of the first slab laser amplification module 20, the second slab laser amplification module 27, and the third slab laser amplification module 47 are Nd:YAG with a doping concentration of 0.7 at.%. <111> Cutting method.

[0046] The first reflector 07, the second reflector 09, the third reflector 19, the fourth reflector 35, the fifth reflector 37, the sixth reflector 38, and the seventh reflector 39 are used to fold the optical path and have high reflectivity for 1319nm laser.

[0047] This invention eliminates the spatial hole-burning effect of the oscillation stage by introducing torsional cavity technology, ensuring that the field intensity of the 1319nm Nd:YAG laser is uniformly distributed along the optical axis in the resonant cavity, suppressing multi-longitudinal mode oscillation from a physical mechanism, and realizing high-purity single-longitudinal mode output.

[0048] This invention coats the surface of a 1319nm total reflection mirror 15 with a 1319nm total reflection film and high transmittance films of 1064nm and 1338nm. It also coats the surface of a 1319nm partially reflective and partially transmittance output mirror 17 with a 1319nm partially reflective and partially transmittance film and high transmittance films of 1064nm and 1338nm. This achieves efficient suppression of oscillations at competing wavelengths such as 1064nm and 1338nm in the oscillation stage, ensuring that the laser outputs only a single-frequency pulse laser at 1319nm. Furthermore, through reasonable coating design in the amplification stage, such as coating the surfaces of the first slab laser amplification module 20, the fourth amplifier cavity mirror 24, the second slab laser amplification module 27, the fifth amplifier cavity mirror 28, the sixth amplifier cavity mirror 31, the third slab laser amplification module 47, the ninth amplifier cavity mirror 42, and the tenth amplifier cavity mirror 45 with a 1064nm high transmittance film (coating can also be applied to other devices in the amplification stage), the spontaneous emission amplification of the 1064nm band generated during the amplification process is suppressed, which significantly improves the energy extraction efficiency during the amplification process.

[0049] The slab laser amplification module used in this invention has the advantage of a one-dimensional thermal lens and is equipped with liquid cooling technology for efficient and uniform heat dissipation, avoiding the beam quality degradation caused by thermal distortion in traditional rod-shaped laser crystals. More importantly, the laser amplifiers are all designed based on the principle of spherical aberration self-compensation. This invention adopts a multi-pass amplification beam structure to actively compensate for the thermal aberrations generated by the slab laser crystal during amplification, thereby effectively ensuring high beam quality while improving output energy.

[0050] By introducing a reasonable arrangement and configuration of optical components and combining it with the aforementioned optical design methods, this invention can overcome the problem of incompatibility between high power and single-frequency characteristics, while ensuring that the laser structure is compact, highly stable, and easy to apply in engineering, especially suitable for fields such as lidar detection.

[0051] The above description is merely an embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related system fields, are similarly included within the protection scope of the present invention.

[0052] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A 1319nm laser based on a torsional cavity and slat configuration, characterized in that, include: The oscillator stage, preamplifier, first-stage main amplifier, and second-stage main amplifier are placed sequentially; the oscillator stage generates a narrow-linewidth pulsed laser in the μJ range and outputs it to the preamplifier. The preamplifier amplifies the incident narrow-linewidth pulsed laser to the mJ level and outputs it to the first-stage main amplifier; the first-stage main amplifier amplifies the incident narrow-linewidth pulsed laser to the tens of mJ level and outputs it to the second-stage main amplifier; the second-stage main amplifier amplifies the incident narrow-linewidth pulsed laser to the hundreds of mJ level. The oscillator stage is based on a torsional cavity configuration and outputs a narrow-linewidth pulsed laser in the μJ range through active electro-optic Q-switching of the oscillator. The preamplifier is based on a slab laser crystal and uses a single-end-pumping method to amplify the μJ-level narrow-linewidth pulsed laser from the oscillator stage to the mJ range. The first-stage main amplifier is based on a slab laser crystal and uses a double-end-pumping method to amplify the mJ-level narrow-linewidth pulsed laser incident on the preamplifier to the tens of mJ range. The second-stage main amplifier is based on a slab laser crystal and uses a double-end-pumping method to amplify the tens of mJ-level narrow-linewidth pulsed laser incident on the first-stage main amplifier to the hundreds of mJ range.

2. The 1319nm laser based on a torsional cavity and slat configuration according to claim 1, characterized in that, The oscillation stage includes: a first fiber pump source, a first fiber pump shaping module, a first reflector, an oscillation stage laser crystal, a second reflector, a second fiber pump shaping module, a second fiber pump source, an electro-optic Q-switched crystal, a first quarter-wave plate, a thin-film polarizer, a 1319nm total reflection mirror, a second quarter-wave plate, a 1319nm partial reflection and partial transmission output mirror, and a third quarter-wave plate. The first fiber pump source and the second fiber pump source are used to pump the oscillating laser crystal; Pump light emitted from the first and second fiber pump sources is shaped by the first and second fiber pump shaping modules, respectively, and then injected into the pump oscillator-level laser crystal after passing through the first and second reflecting mirrors. The second and third quarter-wave plates form a torsional cavity configuration for outputting a single longitudinal mode laser. The first quarter-wave plate, the electro-optic Q-switched crystal, and the thin-film polarizer together form an active electro-optic Q-switching mechanism, enabling the output of the single longitudinal mode laser to be pulsed. The 1319nm total reflection mirror and the 1319nm partial reflection and partial transmission output mirror form the oscillator-level cavity mirror.

3. The 1319nm laser based on a torsional cavity and slat configuration according to claim 2, characterized in that, The electro-optic Q-switching crystal is a KD. P is used to modulate continuous light into pulsed light.

4. The 1319nm laser based on a torsional cavity and slat configuration according to claim 3, characterized in that, The preamplifier includes: a third reflecting mirror, a first slab laser amplification module, a first amplifier cavity mirror, a second amplifier cavity mirror, a third amplifier cavity mirror, a fourth amplifier cavity mirror, a first amplifier pump shaping module, and a first amplifier pump source; The third mirror is used to reflect the laser output from the oscillator stage into the preamplifier; The first amplifier pump source is used to pump the first slab laser amplification module; The first amplifier pump shaping module is used to shape the laser emitted from the first amplifier pump source into a pump spot that matches the size of the first slab laser amplification module; The first amplifier cavity, the second amplifier cavity, the third amplifier cavity, and the fourth amplifier cavity together form the amplification stage cavity of the preamplifier. The first amplifier cavity simultaneously reflects the laser output from the oscillation stage to the preamplifier, and the third amplifier cavity simultaneously reflects the laser output from the preamplifier after amplification to the first-stage main amplifier.

5. The 1319nm laser based on a torsional cavity and slat configuration according to claim 4, characterized in that, The first-stage main amplifier includes: a second slab laser amplification module, a fifth amplifier cavity mirror, a third amplifier pump shaping module, a second amplifier pump source, a sixth amplifier cavity mirror, a second amplifier pump shaping module, a third amplifier pump source, a seventh amplifier cavity mirror, a fourth reflector, an eighth amplifier cavity mirror, a fifth reflector, a sixth reflector, and a seventh reflector. Both the second amplifier pump source and the third amplifier pump source are used to pump the second slab laser amplification module; The third amplifier pump shaping module and the second amplifier pump shaping module are used to shape the laser emitted by the second amplifier pump source and the third amplifier pump source into a pump spot that matches the size of the second slab laser amplification module, respectively. The fifth, sixth, seventh, and eighth amplifier cavities together form the amplification stage cavities of the first-stage main amplifier. The light amplified by the first-stage main amplifier is reflected sequentially by the fourth, fifth, sixth, and seventh reflecting mirrors to the second-stage main amplifier.

6. The 1319nm laser based on a torsional cavity and slat configuration according to claim 5, characterized in that, The second-stage main amplifier includes: a fourth amplifier pump shaping module, a fourth amplifier pump source, a ninth amplifier cavity mirror, a fifth amplifier pump shaping module, a fifth amplifier pump source, a tenth amplifier cavity mirror, an eleventh amplifier cavity mirror, a third slab laser amplification module, and a twelfth amplifier cavity mirror; The pump sources for the fourth and fifth amplifiers are both used to pump the third slab laser amplification module; The fourth amplifier pump shaping module and the fifth amplifier pump shaping module are used to shape the laser emitted by the fourth amplifier pump source and the fifth amplifier pump source into a pump spot that matches the size of the third slab laser amplification module, respectively. The ninth, tenth, eleventh, and twelfth amplifier cavities together form the amplification stage cavities of the second-stage main amplifier, and finally the first amplifier cavity outputs 1319nm laser in the hundreds of mJ range.

7. The 1319nm laser based on a torsional cavity and slat configuration according to claim 6, characterized in that, The pump sources for the first, second, third, fourth, and fifth amplifiers are all water-cooled stacked array diodes with a center wavelength of 808nm.

8. The 1319nm laser based on a torsional cavity and slat configuration according to claim 7, characterized in that, The laser crystal of the oscillating stage laser crystal is made of Nd:YAG with a doping concentration of 0.7 at.%. <111> Cutting method.

9. The 1319nm laser based on a torsional cavity and slat configuration according to claim 8, characterized in that, The laser crystals in the first, second, and third slab laser amplification modules are all Nd:YAG with a doping concentration of 0.7 at.%. <111> Cutting method.

10. The 1319nm laser based on a torsional cavity and slat configuration according to claim 9, characterized in that, The surface of the 1319nm total reflection mirror is coated with a 1319nm total reflection film, and also coated with 1064nm and 1338nm high transmittance films; the surface of the 1319nm partial reflection and partial transmission output mirror is coated with a 1319nm band partial reflection and partial transmission film, and also coated with 1064nm and 1338nm high transmittance films; the surfaces of the first slab laser amplification module, the fourth amplifier cavity mirror, the second slab laser amplification module, the fifth amplifier cavity mirror, the sixth amplifier cavity mirror, the third slab laser amplification module, the ninth amplifier cavity mirror, and the tenth amplifier cavity mirror are all coated with a 1064nm high transmittance film.

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