1319nm laser based on torsional mold cavity and lath configuration

Abstract

The invention discloses a 1319nm laser based on a torsional mode cavity and a lath configuration, which belongs to the technical field of solid lasers and comprises an oscillator stage, a pre-amplifier, a first-stage main amplifier and a second-stage main amplifier which are sequentially arranged, the oscillator stage generates a [mu] J magnitude narrow linewidth pulse laser and outputs the [mu] J magnitude narrow linewidth pulse laser to the pre-amplifier, the pre-amplifier amplifies the incident narrow linewidth pulse laser to an mJ magnitude and outputs the laser to the first-stage main amplifier, the first-stage main amplifier amplifies the incident narrow linewidth pulse laser to a dozens of mJ magnitude, and the second-stage main amplifier outputs the amplified laser to the second-stage main amplifier. The second-stage main amplifier amplifies the incident narrow-linewidth pulse laser to a magnitude of hundreds of mJ, and outputs the narrow-linewidth pulse laser to the second-stage main amplifier. The system outputs narrow-linewidth pulse laser with excellent light beam quality, and can be widely applied to the field of laser radar detection.

Description

Technical Field

[0001] The invention belongs to the technical field of solid lasers, and in particular relates to a 1319nm laser based on a twisted cavity and slab configuration. Background Art

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

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A 1319nm laser based on a twisted cavity and slab configuration comprises: an oscillator stage, a preamplifier, a first-stage main amplifier, and a second-stage main amplifier, which are arranged in sequence; the oscillator stage generates a narrow-linewidth pulse laser of the μJ order and outputs it to the preamplifier; the preamplifier amplifies the incident narrow-linewidth pulse laser to the mJ order and outputs it to the first-stage main amplifier; the first-stage main amplifier amplifies the incident narrow-linewidth pulse laser to the tens of mJ order and outputs it to the second-stage main amplifier; the second-stage main amplifier amplifies the incident narrow-linewidth pulse laser to the hundreds of mJ order;

[0005] The oscillator stage is based on a twisted mode cavity configuration and outputs narrow linewidth pulse lasers of μJ order through active electro-optical Q-switching of the oscillator;

[0006] The pre-amplifier is based on a slab laser crystal and adopts a single-end pumping method to amplify the oscillation-level μJ-level narrow-linewidth pulse laser to the mJ level;

[0007] The first-stage main amplifier is based on a slab laser crystal and adopts a double-end pumping method to amplify the mJ-level narrow-linewidth pulse laser incident from the pre-amplifier to tens of mJ level;

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

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

[0010] The present invention provides a 1319nm laser based on a twisted cavity and slab configuration. The system can output a single pulse energy of approximately 200mJ, a repetition frequency of approximately 100Hz, a compact structure, and a narrow-linewidth pulse laser with excellent beam quality, which can be widely used in the field of lidar detection.

[0011] The present invention eliminates the spatial hole burning effect of the oscillation level by introducing the twisted mode cavity technology, ensures the uniform distribution of the field intensity of the 1319nm Nd:YAG laser along the optical axis in the resonant cavity, suppresses multi-longitudinal mode oscillation from a physical mechanism, and achieves high-purity single longitudinal mode output.

[0012] The present invention utilizes a rational coating design, namely coating the surface of the 1319nm total reflection mirror 15 with a 1319nm total reflection film layer, and coating it with a high-transmittance film layer at 1064nm and 1338nm. The surface of the 1319nm partially reflecting and partially transmitting output mirror 17 is coated with a partially reflecting and partially transmitting film layer in the 1319nm band, and coated with a high-transmittance film layer at 1064nm and 1338nm. At the oscillation stage, the oscillation of competing wavelengths such as 1064nm and 1338nm is effectively suppressed, ensuring that the laser only outputs 1319nm single-frequency pulsed laser. Furthermore, at the amplification stage, a rational coating design is also used to effectively suppress the spontaneous radiation amplification in the 1064nm band generated during the amplification process, significantly improving the energy extraction efficiency during the amplification process.

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

[0014] By introducing a reasonable arrangement and configuration of optical components and combining it with the above-mentioned optical design method, the present invention can overcome the difficult problem of compatibility between high power and single-frequency characteristics, while ensuring that the laser structure is compact and stable, facilitating engineering applications, and is particularly suitable for fields such as lidar detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a structural diagram of a 1319nm laser based on a twisted mode cavity and slab configuration of the present invention, wherein: 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-switched crystal, 13-first quarter wave plate, 14-thin film polarizer, 15-1319nm full reflection mirror, 16-second quarter wave plate, 17-1319nm partially reflecting and partially transmitting 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, 24-third amplifier cavity mirror, 25-third amplifier cavity mirror, 26-third amplifier cavity mirror, 27-third amplifier cavity mirror, 28-third amplifier cavity mirror, 29-third amplifier cavity mirror, 30-third amplifier cavity mirror, 31-third amplifier cavity mirror, 32-third amplifier cavity mirror, 33-third amplifier cavity mirror, 34-third amplifier cavity mirror, 35-third amplifier cavity mirror, 36-third amplifier cavity mirror, 37-third amplifier cavity mirror, 38-third amplifier cavity mirror, 39-third amplifier cavity mirror, 40-first slab laser amplification module, 41-first slab laser amplification module, 42-first slab laser amplification module, 43-first slab laser amplification module, 44-first slab laser amplification module, 45-first slab laser amplification module, 46-first slab laser amplification module, 47 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 reflector, 36-eighth amplifier cavity mirror, 37-fifth reflector, 38-sixth reflector, 39-seventh reflector, 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 DESCRIPTION

[0016] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0017] like Figure 1 As shown, the 1319 nm laser based on the twisted mode cavity and slab configuration of the present invention includes: an oscillator stage 01, a pre-amplifier 02, a first-stage main amplifier 03, and a second-stage main amplifier 04 placed in sequence.

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

[0019] The oscillator stage 01 is based on a twisted mode cavity configuration and outputs a narrow linewidth pulse laser of μJ order through active electro-optical Q-switching of the oscillator 01 .

[0020] The pre-amplifier 02 is based on a slab laser crystal and adopts a single-end pumping method to amplify the oscillation-level μJ-level narrow-linewidth pulse laser to the mJ level.

[0021] The first-stage main amplifier 03 is based on a slab laser crystal and adopts a double-end pumping method to amplify the mJ-level narrow-linewidth pulse laser incident from the pre-amplifier 02 to tens of mJ level.

[0022] The second-stage main amplifier 04 is based on a slab laser crystal and adopts a double-end pumping method to amplify the tens of mJ narrow linewidth pulse laser incident from the first-stage main amplifier 03 to hundreds of mJ.

[0023] Oscillation stage 01 includes: first fiber pump source 05, first fiber pump shaping module 06, first reflector 07, oscillation stage laser crystal 08, second reflector 09, second fiber pump shaping module 10, second fiber pump source 11, electro-optic Q-switched crystal 12, first quarter-wave plate 13, thin-film polarizer 14, 1319nm total reflection mirror 15, second quarter-wave plate 16, 1319nm partially reflecting and partially transmitting output mirror 17, and third quarter-wave plate 18. The connections between the components are as follows:

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

[0025] The pump light emitted by the first and second fiber pump sources 05 and 11 is shaped by the first and second fiber pump shaping modules 06 and 10, respectively, before passing through the first and second reflectors 07 and 09, respectively, and then injected into the pump oscillator-stage laser crystal 08. The second and third quarter-wave plates 16 and 18 form a twisted mode cavity configuration for outputting single longitudinal mode laser light. The first quarter-wave plate 13, electro-optical Q-switched crystal 12, and thin-film polarizer 14 together implement active electro-optical Q-switching, resulting in pulsed single longitudinal mode laser output. The 1319nm total reflection mirror 15 and the 1319nm partially reflecting and partially transmitting output mirror 17 form the oscillator-stage cavity mirrors.

[0026] Electro-optical Q-switched crystal 12 is KD P (a conventional electro-optical 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 a linearly polarized laser.

[0028] The pre-amplifier 02 includes: a third reflector 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 connections between the components are as follows:

[0029] The third reflecting mirror 19 is used to reflect the laser light outputted by the oscillation stage 01 into the pre-amplifier 02 .

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

[0031] The first amplifier pump shaping module 25 is used to shape the 808 nm laser light emitted by the first amplifier pump source 26 into a pump light 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 constitute the amplifier stage cavity mirror of the pre-amplifier 02, wherein the first amplifier cavity mirror 21 simultaneously reflects the laser output by the oscillation stage 01 to the pre-amplifier 02, and the third amplifier cavity mirror 23 simultaneously reflects the laser output after amplification by the pre-amplifier 02 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 connections between the components 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 central wavelength of the pump source is 808 nm, and the operating temperature of the pump source is 25° C.

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

[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 constitute the amplifier stage cavity mirrors of the first stage main amplifier 03 .

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

[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 connections between these components 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 central wavelength of 808 nm and an operating temperature of the pump sources of 25° C.

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

[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 constitute the amplifier stage cavity mirror of the second stage main amplifier 04 . Finally, the ninth amplifier cavity mirror 42 outputs a 1319 nm laser of the order of hundreds of mJ.

[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 diodes with a central wavelength of 808 nm.

[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 oscillation grade laser crystal 08 is made of Nd:YAG with a doping concentration of 0.7at.%. <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 reflecting mirror 07 , the second reflecting mirror 09 , the third reflecting mirror 19 , the fourth reflecting mirror 35 , the fifth reflecting mirror 37 , the sixth reflecting mirror 38 , and the seventh reflecting mirror 39 are used to fold the optical path and have high reflective properties for 1319 nm laser.

[0047] The present invention eliminates the spatial hole burning effect of the oscillation level by introducing the twisted mode cavity technology, ensures the uniform distribution of the field intensity of the 1319nm Nd:YAG laser along the optical axis in the resonant cavity, suppresses multi-longitudinal mode oscillation from a physical mechanism, and achieves high-purity single longitudinal mode output.

[0048] The present invention coats the surface of the 1319nm total reflection mirror 15 with a 1319nm total reflection film layer, and coats it with a 1064nm and 1338nm high transmittance film layer, and coats the surface of the 1319nm partial reflection and partial transmission output mirror 17 with a partial reflection and partial transmission film layer in the 1319nm band, and coats it with a 1064nm and 1338nm high transmittance film layer; thus achieving efficient suppression of oscillations of competing wavelengths such as 1064nm and 1338nm at the oscillation level, ensuring that the laser only outputs 1319nm single-frequency pulsed laser. In addition, the amplification stage is also designed with reasonable coating, 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 (the devices of other amplification stages can also be coated), to suppress the spontaneous radiation amplification in the 1064nm band generated during the amplification process, thereby significantly improving the energy extraction efficiency during the amplification process.

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

[0050] By introducing a reasonable arrangement and configuration of optical components and combining it with the above-mentioned optical design method, the present invention can overcome the difficult problem of compatibility between high power and single-frequency characteristics, while ensuring that the laser structure is compact and stable, facilitating engineering applications, and is particularly suitable for fields such as lidar detection.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied to other related system fields, are also included in the scope of protection of the present invention.

[0052] The contents not described in detail in the specification of the present invention belong to the prior art known to those skilled in the art.

Claims

1. A 1319 nm laser based on a twisted cavity and slab configuration, characterized in that: include: The oscillator stage, pre-amplifier, first-stage main amplifier and second-stage main amplifier are placed in sequence; the oscillator stage generates a narrow linewidth pulse laser of μJ level and outputs it to the pre-amplifier; The pre-amplifier amplifies the incident narrow linewidth pulse laser to the mJ level and outputs it to the first-stage main amplifier; the first-stage main amplifier amplifies the incident narrow linewidth pulse laser to the order of tens of mJ and outputs it to the second-stage main amplifier; the second-stage main amplifier amplifies the incident narrow linewidth pulse laser to the order of hundreds of mJ; The oscillation stage is based on a torsional mode cavity configuration, and outputs μJ-level narrow-linewidth pulse laser through the active electro-optical Q-switching of the oscillator; the pre-amplifier is based on a slab laser crystal, and adopts a single-end pumping method to amplify the μJ-level narrow-linewidth pulse laser of the oscillation stage to the mJ level; the first-stage main amplifier is based on a slab laser crystal, and adopts a double-end pumping method to amplify the mJ-level narrow-linewidth pulse laser incident on the pre-amplifier to tens of mJ; the second-stage main amplifier is based on a slab laser crystal, and adopts a double-end pumping method to amplify the tens of mJ-level narrow-linewidth pulse laser incident on the first-stage main amplifier to hundreds of mJ.

2. The 1319 nm laser based on a twisted cavity and slab 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-optical Q-switched crystal, a first quarter wave plate, a thin film polarizer, a 1319 nm total reflection mirror, a second quarter wave plate, a 1319 nm partially reflecting and partially transmitting output mirror, and a third quarter wave plate; The first optical fiber pump source and the second optical fiber pump source are used to pump the oscillator-level laser crystal; The pump light emitted by the first fiber pump source and the second fiber pump source is shaped by the first fiber pump shaping module and the second fiber pump shaping module respectively, and then injected into the pump oscillator-level laser crystal after passing through the first reflector and the second reflector respectively; the second quarter-wave plate and the third quarter-wave plate constitute a twisted mode cavity configuration for outputting single longitudinal mode laser; the first quarter-wave plate, the electro-optical Q-switched crystal and the thin-film polarizer together constitute active electro-optical Q-switching, so that the output single longitudinal mode laser is output in pulses; the 1319nm total reflection mirror and the 1319nm partial reflection and partial transmission output mirror constitute the oscillation-level cavity mirror.

3. The 1319 nm laser based on a twisted cavity and slab configuration according to claim 2, characterized in that: The electro-optical Q-switched crystal is KD P is used to modulate continuous light into pulsed light.

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

5. The 1319 nm laser based on a twisted cavity and slab 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; The second amplifier pump source and the third amplifier pump source are both used to pump the second slab laser amplification module; The third amplifier pump shaping module and the second amplifier pump shaping module are respectively used to shape the lasers emitted by the second amplifier pump source and the third amplifier pump source into pump light spots that match the size of the second slab laser amplification module; The fifth amplifier cavity mirror, the sixth amplifier cavity mirror, the seventh amplifier cavity mirror and the eighth amplifier cavity mirror together constitute the amplifier stage cavity mirror of the first stage main amplifier; The light amplified by the first-stage main amplifier is reflected to the second-stage main amplifier through the fourth reflector, the fifth reflector, the sixth reflector and the seventh reflector in sequence.

6. The 1319 nm laser based on a twisted cavity and slab 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 fourth amplifier pump source and the fifth amplifier pump source 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 lasers emitted by the fourth amplifier pump source and the fifth amplifier pump source into pump light spots that match the size of the third slab laser amplification module respectively; The ninth amplifier cavity mirror, the tenth amplifier cavity mirror, the eleventh amplifier cavity mirror and the twelfth amplifier cavity mirror together constitute the amplifier stage cavity mirror of the second-stage main amplifier. Finally, the first amplifier cavity mirror outputs a 1319nm laser of the order of hundreds of mJ.

7. The 1319 nm laser based on a twisted cavity and slab configuration according to claim 6, characterized in that: The first amplifier pump source, the second amplifier pump source, the third amplifier pump source, the fourth amplifier pump source and the fifth amplifier pump source are all water-cooled stacked array diodes with a central wavelength of 808 nm.

8. The 1319 nm laser based on a twisted cavity and slab configuration according to claim 7, characterized in that: The laser crystal of the oscillation-level laser crystal is Nd:YAG, with a doping concentration of 0.7at.%. <111> Cutting method.

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

10. The 1319 nm laser based on twisted cavity and slab configuration according to claim 9, characterized in that: The surface of the 1319nm total reflection mirror is coated with a 1319nm total reflection film layer, and is 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 partial reflection and partial transmission film layer in the 1319nm band, and is 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 layer.

Images