An actively Q-switched eye-safe orthogonally-polarized dual-wavelength intracavity Raman laser was demonstrated for the first time, to the best of our knowledge. The gain balanced dual-wavelength operation at 1314 and 1321 nm within an in-band pumped Nd:YLF laser was realized by slightly titling the cavity mirrors. Owing to the KGW bi-axial properties, two sets of simultaneous orthogonally-polarized dual-wavelength Raman lasers at 1470, 1490 nm and 1461, 1499 nm were achieved by simply rotating the KGW crystal for 90°, respectively. With an incident pump power of 30 W and an optimized pulse repetition frequency of 5 kHz, the maximum dual-wavelength Raman output powers of 2.6 and 2.4 W were obtained with the pulse widths of 5.8 and 6.3 ns, respectively, corresponding to the peak powers up to 89.7 and 76.5 kW.

中文翻译：

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高峰值功率人眼安全正交偏振双波长Nd：YLF / KGW拉曼激光器

据我们所知，首次展示了一种主动调Q的人眼安全正交偏振双波长腔内拉曼激光器。在带内泵浦Nd：YLF激光器中，在1314和1321 nm处的增益平衡双波长操作是通过稍微倾斜腔镜实现的。由于KGW的双轴特性，只需简单地将KGW晶体旋转90°，就可以得到两组分别在1470、1490 nm和1461、1499 nm处的同时正交偏振双波长拉曼激光器。在30 W的入射泵浦功率和5 kHz的优化脉冲重复频率的情况下，最大双波长拉曼输出功率分别为2.6和2.4 W，脉冲宽度分别为5.8 ns和6.3 ns，分​​别对应于峰值功率高达89.7和76.5 kW。