Depolarization in high power Faraday isolators with single mode and multi-mode laser incidences

被引：1
作者：
Ge T. [1 ]
Lu D. [1 ]
Wu J. [1 ]
Xu K. [1 ]
Lin J. [1 ]
机构：
[1] Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 06期
关键词：
Depolarization; Faraday isolator; High power; Multi-mode; Single mode;
D O I：
10.3788/HPLPB20102206.1229
中图分类号：
学科分类号：
摘要：
Employing Jones theory, thermal self-induced depolarization in high power conventional Faraday isolators is investigated with single mode and multimode lasers. The results show that depolarization in high power isolators is composed of depolarization induced by linear birefringence and depolarization induced by circular birefringence, and both are proportional to square of laser power; with a constant laser power, depolarization induced by linear birefringence is beam radius independent, but depolarization induced by circular birefringence increases with decrease of beam radius. Both depolarizations are reduced by multimode incidence. Depolarization induced by linear birefringence with multimode incidence is only 0.6 times that with single mode. Reduction of depolarization induced by circular birefringence is more effective with larger beam radius.
引用
收藏
页码：1229 / 1233
页数：4
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