Plano-concave laser cavity double-optical-path alignment device and method based on Gaussian beam

Abstract

The invention discloses a plano-concave laser cavity double-optical-path alignment device and method based on a Gaussian beam, belonging to the field of solid-state laser device laser cavity adjustment. Two optical paths are set to align concave and plane cavity lenses with different refractive characteristics, and a positive focal power lens group with a focal point that coincides with a spherical center of the concave cavity lens is set in a concave cavity lens alignment optical path. For the Gaussian beam, a composite system formed by the lens group and the concave cavity lens is equivalentto a flat plate, so the refractive characteristics of the concave cavity lens are modified, an alignment spot with a similar size with the plane cavity lens is obtained, and the alignment accuracy ofa resonant cavity is improved. For resonant cavities with different concave cavity lens radii, the alignment can be achieved only with the satisfaction of the coincidence of a positive focal power lens group focal point and the spherical center of the concave cavity lens, and the alignment accuracy is stable without degradation.

Description

Technical field [0001] The present invention relates to the technical field of laser cavity adjustment of solid lasers, in particular to a dual optical path alignment device and method for a plano-concave laser cavity based on Gaussian beams. Background technique [0002] Solid-state lasers are widely used in civil, military, processing, medical and scientific research fields. It is commonly used in stage lighting, ranging, coherent measurement, punching, cutting and welding, atmospheric detection, spectroscopy research, surgery and ophthalmic surgery. The solid-state laser technology is developing extremely rapidly in our country, especially in the low- and medium-power solid-state laser technology, the industrialization road has been very mature. However, most of the production process of solid-state lasers on the production line still follows the traditional single-line mode, with strict sequential processes. Usually the resonant cavity is adjusted manually after starting th...

AI Technical Summary

Problems solved by technology

It can be predicted that with the decrease of the radius of curvature of the concave cavity mirror, due to the further increase of the refractive difference of the plano-concave cavity mirror, the difficulty of balancing will increase and the alignment accuracy will deteriorate

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