Full solid state electro-optic modulation Q green laser

Abstract

A full solid state electro-optic modulation Q green laser adopts a V-shaped folding cavity. An optical coupled system, a plano-concave front cavity mirror, a laser crystal, a polarizer, a 1 / 4 wave plate, an electro-optic modulation Q crystal and a negative meniscus shaped refrative mirror are sequentially arranged along the direction of advance of the laser output by a laser diode. The reflected light path of the negative meniscus shaped refrative mirror is sequentially provided with a frequency doubling crystal and a plano-concave rear cavity mirror. The laser has the advantages of compact structure, high output pulse repetition rate, narrow pulse width, high beam quality, and the like, and can be widely applied to the fields such as laser material processing, laser color display, laser medicine, military confrontation, undersea detection, etc.

Description

technical field [0001] The invention belongs to the field of solid-state laser devices, and in particular relates to an all-solid-state high repetition rate electro-optic Q-switched pulse 532nm green laser device pumped by an LD end face. Background technique [0002] In the late 1980s, with the major breakthroughs in crystal materials and laser diode technology, solid-state lasers developed rapidly, and their application fields continued to expand. The all-solid-state pulsed green laser pumped by laser diode (LD) has the advantages of small size, high conversion efficiency, good beam quality, high stability, long life, etc. It is widely used in laser material processing, laser color display, laser medical treatment, military Confrontation, underwater detection and other fields. Extensive new research has been carried out at home and abroad. At present, the maximum average power output of pulsed green lasers has exceeded 200W, but most of them use passive Q-switching or aco...

AI Technical Summary

Problems solved by technology

Extensive new research has been carried out at home and abroad. At present, the maximum average power output of pulsed green lasers has exceeded 200W, but most of them use passive Q-switching or acousto-optic Q-switching. Both methods have their inherent shortcomings. Passive Q-switching output single pulse energy is low, and the stability is not high; the speed of acousto-optic Q-switching switching is slow, and the output pulse width is wide, generally exceeding 100ns. These shortcomings limit the application range of lasers

The performance of electro-optic Q-switching is stable, the switching speed is fast, and it is easy to obtain narrow pulses below 20ns. However, due to the limitations of the high-voltage drive source and the Q-switching crystal itself, the repetition rate is low and the average output power is not high.

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