Depolarization induced by pump edge effects in high average power laser rods
Depolarization induced by pump edge effects in high average power laser rods
复制标题
高平均功率激光棒中泵浦边缘效应引起的去偏振
DOI：
10.1364/josab.27.000038
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发表时间：
2010
影响因子：
1.9
通讯作者：
Y. Shimony
中科院分区：
文献类型：
--
作者：
Y. Lumer;I. Moshe;S. Jackel;Z. Horvitz;A. Meir;R. Feldman;Y. Shimony
从理论上和实验上分析了泵浦边缘效应引起的激光棒中的非径向对称残余双折射。对于钇铝石榴石 (YAG) 等立方晶体，这种去极化具有独特的六重对称性，与晶体的立方对称性密切相关。虽然这种去极化与线偏振或圆偏振观察到的去极化相比较小，但当在产生超过 70 W/cm 热功率的棒中使用径向或方位角偏振时，它是可测量的且很重要。定义了一个简单的标准，以帮助估计高功率激光棒系统中的去偏振量。
Non-radially symmetric residual birefringence in laser rods due to pump edge effects is analyzed both theoretically and experimentally. For cubic crystals such as yttrium aluminum garnet (YAG), this depolarization has a unique sixfold symmetry that is closely connected to the crystal's cubic symmetry. While this depolarization is small compared to that observed with linear or circular polarizations, it is measurable and important when using radial or azimuthal polarizations in rods generating heat powers in excess of 70 W/cm. A simple criterion was defined in order to help estimate the amount of depolarization in a high-power laser rod system.