Temperature dependence of the thermo-optical properties of KDP single crystal measured by thermal relaxation and thermal lens methods

Abstract

In this work, thermal lens spectrometry and the thermal relaxation method were applied to determine the thermo-optical properties of KDP single crystal as a function of temperature. The results showed the expected phase transitions of the crystal at different temperatures and also provided the behavior of the thermal lens amplitude when the crystal temperature was increased. This information is relevant since this material is widely used in many optical systems, especially in high power laser cavity.