Extra-cavity resonant ultraviolet laser generator

Abstract

The invention discloses an extra-cavity resonant ultraviolet laser generator, comprising a second harmonic system and a fourth harmonic system on the same collimating light path, wherein the second harmonic system is a full-solid laser structure, and the fourth harmonic system is an extra-cavity resonant structure and comprises a 532nm photoisolator, a fourth harmonic front-end bicolor lens, a fourth harmonic NOL (non-linear optics) frequency transformation crystal and a fourth harmonic back-end bicolor lens; the 532nm photoisolator is arranged at an output end of the collimating light path of the second harmonic system; a fourth harmonic F-P resonant cavity formed by the fourth harmonic front-end and back-end bicolor lenses is arranged behind the 532nm photoisolator; and the fourth harmonic NOL frequency transformation crystal is arranged in the fourth harmonic F-P resonant cavity. The generator has the characteristics of simple structure, small volume, high power, stable laser output power, good light beam quality and the like.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to an extracavity resonant ultraviolet laser generating device. Background technique [0002] At present, most of the generation mechanisms of ultraviolet lasers use hydrogen ion ultraviolet lasers, argon ion lasers, LED ultraviolet lasers, or second harmonics output by LD or all-solid-state lasers, through nonlinear optical crystal frequency conversion, and then use prisms to split light. UV laser output. First of all, among the above-mentioned various types of lasers, hydrogen ion lasers have a low safety factor, argon ion lasers are bulky, LED ultraviolet lasers have poor coherence, and LD frequency conversion produces ultraviolet light with poor output quality and high price; secondly, the above-mentioned solid-state lasers produce ultraviolet light Mainly use nonlinear optical crystals such as BBO to convert the frequency of the all-solid-state second harmonic to realize the ou...

AI Technical Summary

Problems solved by technology

First of all, among the above-mentioned various types of lasers, hydrogen ion lasers have a low safety factor, argon ion lasers are bulky, LED ultraviolet lasers have poor coherence, and LD frequency conversion produces ultraviolet light with poor output quality and high price; secondly, the above-mentioned solid-state lasers produce ultraviolet light Mainly use nonlinear optical crystals such as BBO to convert the frequency of the all-solid-state second harmonic to achieve ultraviolet laser output

Although the structure of the all-solid-state laser is relatively compact and the quality of the output beam is good, the second harmonic and the fourth harmonic are generally split by a prism, which limits the further improvement of its power and occupies the limited space of the overall laser, which increases The complexity of the structure of the solid-state laser device is limited, and the further compression of its structure is limited

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