Abstract
Thermal induced birefringence in a QCW diode pumped Nd:YAG laser is experimentally investigated. The isogyre pattern is analyzed in a polariscopic arrangement and at 1 kHz pulse repetition rate. The depolarization loss was significantly reduced and efficient compensation of birefringence effect, about %75, was attained by using a double-rod configuration and a 90° polarization rotator with a suitable imaging optical telescope. The laser output energy per pulse before compensation was 10 mJ, whereas after compensation, this energy was enhanced to more than 16 amJ.
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