Thermo-mechanical properties and laser-induced damage behaviors in NYCF and NYSF crystals with different orientations数据集

Nd,Y:CaF2 (NYCF) and Nd,Y:SrF2 (NYSF) crystals are excellent types of laser gain media owing to their enhanced absorption-emission cross sections and fluorescence lifetimes, and high thermal conductivity. In this study, the laser damage behaviors of crystals with different orientations under 1064 nm nanosecond laser are analyzed through investigation of the thermo-mechanical properties with different orientations. The results demonstrate that the superior thermal conductivity and flexural strength of NYCF crystals attribute to a higher thermal shock resistance parameter and laser-induced damage threshold (LIDT) compared to NYSF crystals. The {110} plane exhibits the highest LIDT due to optimal thermo-mechanical properties, while the {111} plane shows the lowest LIDT due to its minimal flexural strength and weakest thermal shock resistance. A strong linear correlation between radial flexural strength and LIDT further confirms the critical role of intrinsic thermo-mechanical properties in determining the damage resistance for nanosecond laser pulses. This work could provide insights for designing high-power laser gain media and optimizing crystallographic orientations to enhance performance under extreme laser conditions.