Wagner F R, Hildenbrand A, Natoli J Y, Commandré M, Théodore F, Albrecht H
Opt Express. 2007 Oct 17;15(21):13849-57. doi: 10.1364/oe.15.013849.
Nanosecond-laser induced damage of RbTiOPO(4) crystals (RTP) has been studied at 1064 nm as a function of propagation direction and polarization orientation. A significant difference in the Laser Induced Damage Threshold (LIDT) was observed for x-cut and y-cut crystals in Pockels cell configuration, where the light propagation direction is along the x and y axes of the crystal respectively. In Pockels cell configuration the polarization is oriented at 45? with respect to the z-axis of the crystal. Experiments with the polarization oriented parallel to the principal axes of the crystal pointed out the importance of the polarization direction for the LIDT whereas the propagation direction did not significantly influence the LIDT. Comparison of the experimental data with a simple model reveals the influence of frequency doubling on the LIDT in Pockels cell configuration. In the case of the y-cut Pockels cell, the generation of frequency doubled light causes an LIDT below the LIDT of x and z-polarized light at the fundamental wavelength.
已研究了纳秒激光在1064 nm波长下对磷酸钛氧铷（RbTiOPO₄，RTP）晶体的损伤，该损伤是传播方向和偏振取向的函数。在普克尔盒配置中，观察到x切割和y切割晶体的激光诱导损伤阈值（LIDT）存在显著差异，其中光传播方向分别沿晶体的x轴和y轴。在普克尔盒配置中，偏振相对于晶体的z轴成45°取向。偏振平行于晶体主轴的实验指出了偏振方向对LIDT的重要性，而传播方向对LIDT没有显著影响。将实验数据与一个简单模型进行比较，揭示了倍频对普克尔盒配置中LIDT的影响。在y切割普克尔盒的情况下，倍频光的产生导致LIDT低于基波波长下x偏振光和z偏振光的LIDT。
