高增益Nd∶YAG板条中的放大自发辐射抑制技术
Acta Optica Sinica（2017）
Abstract
分析了Nd∶ YAG板条中产生强烈放大自发辐射(ASE)的原因,开展了抑制高增益激光板条中ASE的理论和实验研究.抽运光占空比为8％,峰值抽运功率为21.38 kW,波长为1064 nm连续探测光的注入光强为4 W/cm2,在Nd∶YAG板条上、下表面镀制普通倏逝膜和多层复合膜时探测光功率的放大倍率分别为1.82和1.92,Nd∶YAG板条总储能增大了4.6％.实验结果表明:通过对Nd∶ YAG板条上、下表面镀制多层复合膜,可在一定程度上抑制板条内的ASE效应,增大激光板条的总储能.
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Key words
laser optics,amplified spontaneous emission,small signal gain coefficient,total internal reflection,multi-layer film
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