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A folded cavity and laser

A folded cavity, laser gain technology, applied in the field of lasers

Active Publication Date: 2017-03-15
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, although the research on laser astigmatism compensation has made great progress, there is still a lack of a laser planar folded cavity that can compensate for the astigmatism of the three arms at the same time.

Method used

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  • A folded cavity and laser
  • A folded cavity and laser
  • A folded cavity and laser

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] The specific realization of the present invention is described in detail below in conjunction with specific embodiment:

[0055] see Figure 1 ~ Figure 3 , the folded cavity provided by the embodiment of the present invention is mainly used as a resonant cavity of a solid-state laser, including a reflector 1 and an output mirror 2 as two arms of the folded cavity respectively, and the optical path between the reflector 1 and the output mirror 2 is arranged in turn At least one astigmatism compensation unit 3 . The astigmatism compensation unit 3 includes a laser working substance 31, which...

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Abstract

The invention is applicable for the technical field of laser, and provides a folding cavity which comprises a first end mirror and a second end mirror. At least an astigmatism compensation unit is arranged between the first end mirror and the second end mirror; the astigmatism compensation unit comprises a laser working substance placed at a Brewster angle and a first curved mirror and a second curved mirror both located on the two sides of a Brewster surface; an axial distance between the first and second curved mirrors and respective opposite Brewster surfaces are as follows: Formula; an angle of incidence of a Gauss beam entering into the first curved mirror and the second curved mirror meets with the follows: Formula; the first end mirror and the second end mirror are located at a beam waist position or a position having a distance of Lj+ to the beam waist, Formula, fj+ is a focal distance of the first end mirror or the second end mirror, Formula. The folding cavity provided by the invention can compensate three-arm astigmatism to further improve the performance of a laser; the designing scheme of the folding cavity plays relatively great significance for the improvement of the performance of the laser.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a folded cavity and a laser. Background technique [0002] Resonators are an important part of solid-state lasers. The mode characteristics, beam quality, stability and output power of a laser depend largely on the laser resonator design. Therefore, the resonator is the core of the laser, and the design of the resonator is one of the hotspots and difficulties in current laser research. Generally, folded cavities are widely used as cavity types of laser resonators. Because it can realize focusing at multiple positions in the cavity, reduce the dispersion and the volume of the laser. In the folded cavity, the oblique incidence of the beam on the curved mirror will cause astigmatism, which will seriously reduce the performance of the laser and lead to the deterioration of the beam quality of the transverse mode spot of the laser output. Therefore, how to compensate for astigmatis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/081H01S3/16
Inventor 文侨梁宗森梁国文李冀牛憨笨
Owner SHENZHEN UNIV