National Institute for Fusion Science, Toki, Gifu, Japan.
Opt Lett. 2013 May 15;38(10):1751-3. doi: 10.1364/OL.38.001751.
The thermal-birefringence-induced depolarization in terbium gallium garnet (TGG) ceramics has been investigated experimentally. The depolarization ratio of 6.1×10(-4) has been observed at the maximum input power of 117 W cw, which corresponds to a normalized laser power of p=0.14. As predicted by the previously proposed theory, the amount of depolarization ratio and its slope with respect to the laser power of the ceramic TGG was approximately the same as that previously reported for high-quality-cut <111> single crystal.
实验研究了掺铽钆镓石榴石（TGG）陶瓷中的热双折射引起的退偏。在最大输入功率为 117 W 的连续波下，观察到 6.1×10(-4)的退偏比，这对应于归一化激光功率 p=0.14。正如先前提出的理论所预测的，陶瓷 TGG 的退偏比及其与激光功率的斜率与以前报道的高质量切割<111>单晶的结果大致相同。
