The polarization state in a double-corner-cube-retroreflector (DCCR) ring cavity is analyzed using Jones matrix. Based on the analysis results, an output coupling ratio tunable DCCR ring cavity created by employing a polarization beam splitter, and wave plates (including $\lambda /{2}$ plate and $\lambda /{4}$ plate) is studied theoretically and experimentally. The theoretical output coupling ratio tuning ranges are calculated as ${0.01}\% \;\sim\;{80.86}\%$ by rotating the $\lambda /{2}$ plate, ${0}\;\sim\;{89.32}\%$ by rotating the $\lambda /{4}$ plate, and ${2.71}\% \;\sim\;{81.37}\%$ by rotating corner-cube retroreflector (CCR). The experimental measurement results are consistent with theoretical expectations. An output coupling ratio tunable Er:YAG laser with a DCCR ring cavity is also set up to verify the beneficial effect of output coupling ratio tuning. At given pump power, by tuning the output coupling ratio, the laser obtains optimum operation efficiency and realizes wavelength conversion between 1645 and 1617 nm.

中文翻译：

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输出耦合比可调双角锥后向反射器环形腔的理论与实验研究

使用琼斯矩阵分析双角立方回射器 (DCCR) 环形腔中的偏振态。基于分析结果，对采用偏振分束器和波片（包括$λ/{2}$片和$λ/{4}$片）形成的输出耦合比可调DCCR环形腔进行了理论研究和实验。理论输出耦合比调谐范围计算为${0.01}\% \;\sim\;{80.86}\%$通过旋转$\lambda /{2}$板，${0}\;\sim\ ;{89.32}\%$通过旋转$\lambda /{4}$板，和${2.71}\% \;\sim\;{81.37}\%$通过旋转角立方回射器 (CCR)。实验测量结果与理论预期一致。还建立了具有 DCCR 环形腔的输出耦合比可调谐 Er:YAG 激光器，以验证输出耦合比调谐的有益效果。在给定的泵浦功率下，通过调整输出耦合比，激光器获得最佳工作效率，实现1645~1617nm波长转换。