OPO laser employing semiconductor pump and passively Q-switched system

Abstract

The invention discloses an OPO laser employing a semiconductor pump and a passively Q-switched system. The OPO laser includes a base, a focusing assembly, a KTP assembly, a Q switch assembly, a full reflection lens assembly, an output lens, a fan and an end board. The base is composed of a device body and a front cavity and a rear cavity mounted in the device body. The front cavity communicates with the rear cavity via a left laser rod hole. The focusing assembly is mounted in the rear cavity. The fan is fixed on the top part of the focusing assembly through a screw. The KTP assembly is fixedin the front cavity. The output lens is mounted in the front end of the front cavity. The Q switch assembly and the full reflection lens assembly are mounted on the end board. The output lens and thefull reflection assembly form a laser resonance cavity. The OPO laser provided by the invention is small in size, high in reliability, long in service lifetime and can realize output of multi-pulse human eye friendly laser. The OPO laser provided by the invention is applied to products such as human eye friendly lasers, multi-pulse human eye friendly laser ranging devices and the like.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, and more specifically relates to a semiconductor-pumped passive Q-switching system OPO laser. Background technique [0002] Optical parametric oscillation (OPO) lasers use the nonlinear effect of nonlinear crystals to generate 1.57um eye-safe laser radiation with a 1.064um pump laser, and are widely used in laser ranging, environmental detection, and lidar. OPO lasers also have the advantages of being able to work at high repetition rates and easily obtain larger output energy, and are favored in the field of military lasers. [0003] Existing OPO lasers mostly use krypton lamps as pumping sources. The energy conversion efficiency of lamp pumped lasers is low, and the life of krypton lamps is short and requires frequent maintenance and replacement. At the same time, lamp pumped lasers require a huge cooling system to absorb a large amount of waste heat generated during work. As a resu...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a semiconductor-pumped passive Q-switching system OPO laser, using a semiconductor as a pump source, and a passive Q-switching technology capable of saturable absorption dye Q-switching, the purpose of which is to Solve the problems of large structure, short life and low reliability of existing OPO lasers to meet the needs of miniaturization, long life and high reliability of military solid-state lasers

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