High repetition rate electro-optic Q-switching of Nd:YAG lasers

The behavior of an electrooptic Q-switch in a high-average-power lsaer is presented. The linear optical absorption of laser radiation produces thermal gradient and consequent thermally-induced birefringence in the electrooptic crystal which disturbs Pockels cell performance. Depolarization losses of the resonator caused by thermally-induced birefringence in the KD*P crystals are experimentally measured.