Device for improving output beam symmetry of nonplanar ring oscillator

Abstract

A device for improving output beam symmetry of a nonplanar ring oscillator comprises a laser dielectric and a heat sink in special design. The laser dielectric is an octahedral nonplanar annular cavity, the heat sink comprises an upper portion and a lower portion and is clamped and contacted with the large upper and lower faces and the left and right sides of the laser dielectric, the heat sink is provided with a groove structure along the propagation direction of pump light in the laser dielectric, and the groove is designed to be an air thermal insulation groove to enable heat to be guided out through other portions, contacted with the heat sink, of the laser dielectric. Temperature gradient in the vertical and bilateral directions of the laser dielectric can approximate to symmetrical distribution by setting proper groove position, width and depth parameters, and accordingly symmetrical laser output can be obtained. The device for improving output beam symmetry of the nonplanar ring oscillator is low in cost, simple in structure and easy to implement, and the problem of nonsymmetrical outputted laser of the nonplanar ring oscillator can be solved effectively.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a device for improving the symmetry of output beams of non-planar ring cavity lasers. Background technique [0002] All-solid-state laser (DPSSL, Diode Pumped Solid State Laser) refers to a solid-state laser that uses a semiconductor laser (LD) as a pump source. The source and other parts are composed of solid materials. It combines the advantages of traditional solid-state lasers and semiconductor lasers, and at the same time facilitates modularization and electrical excitation. Therefore, it has become an important development direction of laser technology and is currently the most potential new generation. One of the laser sources. [0003] Since most of the pump light will be converted into heat and deposited in the laser medium, it is necessary to wrap a medium with high thermal conductivity around the laser medium for heat dissipation to reduce the impact of the...

AI Technical Summary

Problems solved by technology

Since the thickness of the laser medium is smaller than the width, the temperature gradient in the thickness direction of the laser medium is much larger than the temperature gradient in the width direction, resulting in a smaller thermal focal length in the thickness direction than in the width direction. This thermal focal length is in two directions The asymmetry caused the output elliptical spot beam, which affected the practical application of non-planar ring cavity lasers in some aspects

Images