The compact dual-crystal orthogonally polarized Tm,Ho:YLF laser with balanced orthogonal polarization output power was reported for the first time, to the best of our knowledge. Two pieces of a-cut Tm,Ho:YLF crystals were placed compactly with their c-axis perpendicular. The maximum multimode total output power of 460 mW was obtained with the slope efficiency of 28.2%, and the M² factor value was measured to be 1.07. By adjusting the pump focus position along the optical axis in the process of changing pump power, the balanced output powers in the two orthogonal polarization directions were successfully achieved, and the maximum output powers of the P-polarization and S-polarization states were both 215 mW. Inserting two uncoated solid state etalons into the resonator, the dual-wavelength single-longitudinal-mode laser with orthogonal polarization was obtained. The output powers at P-polarized 2052.1 nm and S-polarized2065 nm were 71mW and 62mW, respectively, and the M² factor was 1.26. The orthogonally polarized dual-wavelength laser at 2 µm can be used as a seed laser for differential absorption lidars and coherent THz wave generation.

中文翻译：

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具有平衡正交偏振输出功率的紧凑型双晶 Tm,Ho:YLF 激光器

据我们所知，首次报道了具有平衡正交偏振输出功率的紧凑型双晶正交偏振 Tm,Ho:YLF 激光器。两片 a-cut Tm,Ho:YLF 晶体紧密放置，c 轴垂直。获得的最大多模总输出功率为 460 mW，斜率效率为 28.2%，M ²测得的因子值为 1.07。通过在改变泵浦功率的过程中沿光轴调整泵浦焦点位置，成功实现了两个正交偏振方向的平衡输出功率，P偏振态和S偏振态的最大输出功率均为215兆瓦。将两个未镀膜的固态标准具插入谐振腔，得到正交偏振的双波长单纵模激光器。P偏振2052.1 nm和S偏振2065 nm的输出功率分别为71mW和62mW，M ²因子为1.26。2 µm 的正交偏振双波长激光器可用作差分吸收激光雷达和相干太赫兹波生成的种子激光器。