High-power all-solid-state laser multi-wavelength spectral synthesis device

A synthesis device and high-power technology, applied in the direction of laser devices, active medium materials, etc., can solve the problems of multiple sidelobes of synthetic light spots, limitation of the number of beam synthesis, and degradation of beam quality, so as to correct beam dispersion and beam quality deterioration, reduce Spectral requirements, the effect of efficient and stable spectral synthesis

Active Publication Date: 2019-03-08
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, there are many technical problems in the coherent combination of multi-beams: there are many side lobes in the synthetic spot of coherent combination, which reduces the quality and brightness of the beam
Polarization combining combines multiple beams of linearly polarized light with a specific polarization state. The number of combined beams is limited, and it is difficult to achieve laser polarization maintenance under high power conditions. Therefore, polarization combining technology is rarely used in high-power laser combining.
Beam combining is simply arranging multiple lasers side by side in space. There is no spatial interference effect between the lasers, but a simple superposition of energy, and the beam quality will drop sharply with the increase of the number of beams. conducive to practical application

Method used

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  • High-power all-solid-state laser multi-wavelength spectral synthesis device
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  • High-power all-solid-state laser multi-wavelength spectral synthesis device

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This embodiment provides a kind of 100kW level high-power all-solid-state laser multi-wavelength spectrum synthesis device, adopts a Nd:YAG crystal 1064nm high-power sub-laser 1-1 and a Yb:YAG crystal 1030nm high-power sub-laser 1-2 pair Wavelength spectrum synthesis to obtain 100kW high-power all-solid-state laser output.

[0045] This example figure 2 and image 3 As shown, the two laser oscillators 1-01 are side-pumped dual-rod cascaded four-mirror ring cavity lasers:

[0046] Nd:YAG crystal 1064nm high-power sub-laser laser oscillator 1-01 has 1064nm etalon as wavelength control device 1-08, its thickness is 5mm, and both ends face 1064nm light reflectivity 60%; Yb:YAG crystal The laser oscillator 1-01 of the 1030nm high-power sub-laser has a 1030nm etalon as a wavelength control device 1-08, the thickness of which is 8mm, and the reflectivity of both ends facing 1030nm light is 40%;

[0047] The specific structure of 1064nm laser oscillator 1-01 using side-pump...

Embodiment 2

[0055] This embodiment provides a 100kW class high-power all-solid-state laser multi-wavelength spectrum synthesis device, using a Nd:YAG crystal 1064nm high-power sub-laser 1-1 and a Nd:YAG ceramic high-power sub-laser 1-2 dual-wavelength Spectral synthesis to obtain 100kW high-power all-solid-state laser output.

[0056] The structure of the laser is basically the same as in Embodiment 1, the difference is that:

[0057] 1. The laser gain medium is Nd:YAG crystal and Nd:YAG ceramic material. The Nd:YAG crystal material is the same as in Example 1. The Nd:YAG ceramic material selects ceramic laser material as the laser gain medium, wherein the Nd ion doping concentration is 1at.%, the crystal rod diameter is 3mm, and the length is 80mm. Coated with 1064nm laser anti-reflection coating;

[0058] 2. The multi-wavelength spectrum synthesis system 2 is composed of an optical lens 2-1 and a synthesis device 2-2; the optical lens 2-1 is a quartz crystal, and the optical end surfa...

Embodiment 3

[0062] This embodiment provides a 100kW class high-power all-solid-state laser multi-wavelength spectrum synthesis device, using a Nd:YAG crystal 1064nm high-power sub-laser 1-1 and two highly doped Nd:YAG ceramic high-power sub-lasers 1-2, 1-3 multi-wavelength spectrum synthesis to obtain 100kW high-power all-solid-state laser output.

[0063] The structure of the laser is basically the same as in Embodiment 1, the difference is that:

[0064] 1. The laser gain medium is Nd:YAG crystal and highly doped Nd:YAG ceramic material. The Nd:YAG crystal material is the same as in Example 1. The Nd:YAG ceramic material selects ceramic laser material as the laser gain medium, wherein the Nd ion doping concentration is 5at.%, the crystal rod diameter is 3mm, and the length is 80mm. Coated with 1064nm laser anti-reflection coating.

[0065] 2. The multi-wavelength spectrum synthesis system 2 is composed of an optical lens 2-0, an optical lens 2-1, and a synthesis device 2-2; the optica...

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Abstract

The invention provides a multi-wavelength spectrum synthesis apparatus for high-power all-solid-state laser. The apparatus comprises at least two high-power sub lasers having different laser gain mediums, a multi-wavelength spectrum synthesis system, and a multi-spectrum synthesis feedback control system. At least two of high-power sub lasers have different laser gain mediums and can output laser with different wavelengths to form multi-wavelength sub laser beams; the multi-wavelength sub laser beams are combined by the multi-wavelength spectrum synthesis system; and the multi-spectrum synthesis feedback control system provides feedback type control for the synthesis apparatus. Light beam dispersion and light beam quality reduction after combination of multi-wavelength laser beams caused by a heat effect of the multi-wavelength spectrum synthesis system on the high-power condition can be compensated in real time.

Description

technical field [0001] The invention relates to the field of all-solid-state lasers, in particular to a high-power all-solid-state laser beam combining device. Background technique [0002] High-power all-solid-state lasers (DPL) have extremely broad application prospects in advanced manufacturing, laser medicine, cutting-edge science, and national security. However, while obtaining high average power all-solid-state laser output, maintaining other high-performance parameters such as high beam quality and stability is a hot spot and a difficulty in the field of laser technology research. At present, the schemes for realizing high-power all-solid-state laser output above 10kW mainly include: single laser direct oscillation or main vibration amplification technology, and beam synthesis technology. [0003] For a single solid-state laser, as the laser power continues to increase, due to the limitations of internal physical factors and structural factors (such as thermal effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/23H01S3/16
Inventor 许祖彦薄勇申玉宗楠彭钦军徐一汀徐健许家林高宏伟
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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