Kinetics of the nonlinear-optical crystal equivalent temperature during the interaction with single-mode high-power laser radiation

摘要

Influence of the high-power laser radiation on the piezoelectric resonance in the nonlinear-optical KTiOPO4 crystal was observed. Equivalent crystal temperature can be directly determined from the piezoelectric resonance frequency during interaction of the laser radiation with crystals. Frequency kinetics of the different piezoelectric resonances of the KTiOPO4 crystal were observed for the different pump laser powers up to 14 W. The KTiOPO4 optical absorption coefficient was obtained from the kinetics data.