作　　者： ; ; ; ; ;

机构地区： 北京工业大学

出　　处： 《光电子．激光》 2012年第3期429-433,共5页

摘　　要： 由热应力双折射产生的热退偏是限制Nd:YAG激光器线偏振输出功率的重要因素。本文理论分析并实验证明,相比于传统的[111]方向切割的Nd:YAG晶体棒,使用[100]方向切割的Nd:YAG晶体棒能够改善Nd:YAG激光器的线偏振态输出功率。在理论分析的基础上,实验中采用半导体侧面泵浦不同切割方向的Nd:YAG棒状晶体,比较[111]、[100]方向切割晶体的线偏振输出特性,实验证明[100]方向切割的Nd:YAG棒状晶体,有最小的晶体热退偏方向,可以提高激光器的线偏振输出功率。 The output power of linearly polarized Nd：YAG lasers is typically limited by thermally induced birefringence,which causes depolarization. However,this effect can be reduced by use of crystals which are cut in [100]-direction,instead of the common [111]-direction. In this paper, crystals cut in [111]- and [100]-directions are pumped by laser diodes. A comparison of the output power of linearly polarized laser between two crystals is presented. The experiments demonstrate that the depolarization can be reduced and the output power can be improved through using a [100]-cut Nd： YAG crystal instead of a [111] cut crystal.

关 键 词： 激光 热效应 双折射 热退偏 线偏振输出

领　　域： [电子电信]