角隅全反镜谐振腔激光器的输出特性

 在高功率脉冲气体激光器中，用角隅反射镜作为全反镜，平行平面镜作为输出镜构成角隅全反镜谐振腔。对角隅腔激光器的输出特性和抗失调稳定性进行了研究，并与平凹腔和平平腔激光器进行了比较。实验结果表明：在角隅全反镜失调角为16 mrad时，角隅腔激光器的单脉冲输出能量下降9.2%，且近场输出光斑没有明显变化；而凹面全反镜失调角仅为0.4 mrad时，平凹腔激光器输出能量下降了9%，近场输出光斑严重变形。在输出镜正前方3.12 m处测量，当角隅镜偏转16.3 mrad时，激光器输出光斑与标准状态时的输出光斑重合；凹面全反镜失调角为0.4 mrad时，激光器输出光斑位移14 mm。经模式仪分析表明，角隅腔激光器近场光强分布均匀。

Output characteristics of corner cube mirror resonators

The corner cube mirror cavity consists of a corner cube mirror as the totally reflecting mirror and a parallel flat partially reflecting mirror as the output mirror.This paper presents an experimental study of the anti-misalignment stability and the output characteristics of the corner cube cavity laser compared with the plano-concave cavity and the plane-parallel cavity lasers.When the corner cube mirror is deflected and the misalignment angle turns to 16 mrad,the single-pulse output energy of the corner cube cavity decreases 9.2%,and the near-field laser spot figures of the corner cube cavity laser have little change;When the concave mirror is deflected and the misalignment angle turns to 0.4 mrad,the single-pulse output energy of the plano-concave cavity laser decreases 9%,and the near-field laser spot figures of the plano-concave cavity laser changed badly.If the meterage place stands 3.12 m in front of the output mirror,as the corner cube mirror is deflected and the misalignment angle turns to 16.3 mrad minutes,the near-field laser spot figures locate at the primary place;as the misalignment angle of the concave mirror is 0.4 mrad,the displacement of the near-field laser spot figures is 14 mm.The results of the mode instrument analysis show that the nearfield beam intensity distribution of the corner cube mirror cavity laser is flat.