Compensation of thermo-optical distortions in the active elements of high-power cw Nd:YAG lasers

摘要

Abstract: The main purpose of our investigations consists in creation the solid state laser with power approximately 500 W and high beam quality. The beam quality, as well known, is described with parameter M$+2$/, that characterizes the focusing properties of laser radiation. Notice that the high power technological lasers with lamp pumping have the typical value M$+2$/ from 20 to 100. It could be decreased by means of use the special technical methods of compensation of birefringence and aberrations in the induced thermal lenses of active elements.!6