Cr4+:YAG被动调Q激光器输出特性
Theoretical and experimental research on output characteristics of CrCr4+:YAG passively Q-switched laser
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摘要: 采用理论与实验相结合的方法研究了激光二极管阵列泵浦的Cr4+:YAG被动调Q Nd：YAG激光器的输出特性。重点分析了调Q晶体小信号透过率和反射镜的反射率对激光器的输出能量、脉冲宽度的影响。对数值模拟结果进行了实验验证，数值计算与实验结果基本一致。研究结果表明，在特定的激光晶体参数下，Cr4+:YAG被动调Q激光器的输出能量与脉冲宽度由调Q晶体的小信号透过率和输出镜的反射率决定：输出能量随着小信号透过率增加而减小，对应于一个调Q晶体透过率，有一个最佳反射率使输出能量最大；脉冲宽度随着初始透过率与反射率的增大而增大。
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关键词:
- 调Q激光器 /
- CrCr4+:YAG晶体 /
- 小信号透过率 /
- 输出特性
Abstract: The output characteristics of Cr4+:YAG passively Q-switched laser was studied theoretically and experimentally. The pulse energy and pulse width for different small signal transmission ratios of Q-switching crystal and different reflection indices of output mirror were simulated. The experimental results show good agreement with the theoretical predictions of energy and pulse width. The results indicate that, with a given laser crystal, the output energy and pulse width are determined by the small signal transmission ratio of the Q-switching crystal and the reflectance ratio of the output coupling mirror. The output energy reduces with the increase of the transmission ratio and there is an optimal reflectance ratio of the output coupling mirror to obtain the maximal output energy. The puls -
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