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A loop concave reflector laser resonance cavity

A technology of laser resonator and mirror, applied in the field of laser resonator, can solve the problems that small gain devices are not suitable, the adjustment accuracy is extremely high, the loss is large, etc., and achieves low beam center power density, low manufacturing cost, and high performance. reliable results

Inactive Publication Date: 2008-09-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the parallel plane cavity are: the adjustment accuracy is extremely high and it is easy to misalign. Compared with the stable cavity, the loss is also large, and it is not suitable for small gain devices.

Method used

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  • A loop concave reflector laser resonance cavity
  • A loop concave reflector laser resonance cavity
  • A loop concave reflector laser resonance cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Depend on Figure 1 ~ Figure 2 As shown, an annular concave mirror laser resonator includes a mirror 1 , a laser working medium 3 and an output mirror 2 . The reflector 1 is an annular concave reflector, and its reflective surface is composed of an annular arc-shaped concave surface.

[0042] Analysis of the laser resonator in Example 1 shows that the output beam of the laser resonator of the annular concave mirror is annular, and the power peak position is not at the center of the mirror, but on a circle centered on the center of the mirror, which can reduce reflection The temperature of the mirror, the output mirror and the center of the outer optical path lens can reduce thermal deformation and improve beam stability. image 3 It is a schematic diagram of the output beam of Embodiment 1 of the present invention. Compared with the stable cavity, the mode volume of the laser resonator cavity with annular concave mirror can be increased by about four times when the qu...

Embodiment 2

[0044] Depend on Figure 4 ~ Figure 5 As shown, the reflector 1 is an annular concave reflector, and its reflective surface is composed of an annular arc-shaped concave surface and a central circular reflective surface. The central circular reflective surface can be a plane or a spherical surface.

[0045] Analysis of the laser resonator in Example 2 shows that the output beam of the laser resonator of the annular concave mirror is annular, and the power peak position is not at the center of the mirror, but on a circle centered on the center of the mirror, which can reduce reflection The temperature of the mirror, the output mirror and the center of the outer optical path lens reduces thermal deformation and improves beam stability. Compared with the stable cavity, the laser resonator using the annular concave mirror can greatly increase the mode volume and greatly increase the laser output power under the condition that the quality of the output laser beam is guaranteed and t...

Embodiment 3

[0047] Depend on Figure 6 ~ Figure 7 As shown, the reflector 1 is an annular concave reflector, its reflective surface includes an annular arc-shaped concave surface, the center of the mirror surface is a non-reflective surface or hollow, and the laser working medium 3 is an annular cylindrical working medium.

[0048]Analysis of the laser resonator of embodiment 3 shows that the laser resonator output beam of the annular concave mirror is annular, and the power peak position is not at the center of the mirror, but on a circle with the center of the mirror as the center of the circle, which can reduce the The temperature of the reflector, the output mirror and the center of the outer optical path lens can reduce thermal deformation and improve beam stability. Compared with the stable cavity, the laser resonant cavity with annular concave mirror can greatly increase the laser output power under the condition that the quality of the output laser beam is guaranteed and the diver...

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PUM

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Abstract

The invention discloses a toroidal concave reflector laser cavity resonator which comprises a reflector, a laser medium and an output mirror and the toroidal concave reflector laser cavity resonator is characterized in that: the reflector is toroidal and concave and comprises one or more homocentric and toroidal arc concave faces. The invention can make the center of the reflecting surface into a round surface or the center of the reflector surface into a non reflecting surface or an air core. The invention can also adopt a toroidal concave output mirror. The laser cavity resonator of the invention has simple processing, convenient adjustment, stable working, large available mode volume, very small divergence angle and good beam quality, thus being applicable to middle, high power gas lasers or solid lasers and especially being applicable to gain medium of large volume and toroidal and columnar gain medium.

Description

technical field [0001] The invention relates to laser resonant cavity technology, in particular to a laser resonant cavity with an annular concave reflector. Background technique [0002] In many occasions of laser application, such as laser drilling, welding, cutting and laser medical treatment, etc., it is hoped that the laser can work in the fundamental mode state with the smallest divergence angle and the best beam quality. Traditional mode selection techniques (such as using an aperture stop) can improve the quality of the laser output beam, but the use of an aperture stop limits the mode volume to a large extent and increases the mode loss. [0003] The key to the design of high-power laser devices is how to achieve high-power single-mode operation while obtaining the largest possible mode volume and good transverse mode discrimination ability, so as to extract energy efficiently from the active material while maintaining high beam quality. [0004] There are three t...

Claims

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Application Information

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IPC IPC(8): H01S3/08
Inventor 唐霞辉秦应雄柳娟彭浩邓前松钟如涛
Owner HUAZHONG UNIV OF SCI & TECH
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