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首页> 外文期刊>Laser Physics: An International Journal devoted to Theoretical and Experimental Laser Research and Application >Growth of high quality non-linear optical crystal zinc germanium phosphide for Mid-infrared optical parametric oscillator
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Growth of high quality non-linear optical crystal zinc germanium phosphide for Mid-infrared optical parametric oscillator

机译：用于中红外光学参量振荡器的高质量非线性光学晶体磷化锗锌的生长

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ZnGeP_2 single crystals were grown from Vertical Bridgman method. High-quality near-stoichiometric ZnGeP_2 single crystals were obtained in the diameter of 30 mm and length of 120 mm. The results showed that after thermal annealing of the crystals the optical absorption coefficient was below 0.03 cm~(-1) at 2.05 μm, and ～0.02 cm~(-1) at 3-8 μm. The low absorption loss ZnGeP_2 samples with dimension of 6 × 6 × 18 mm~3 were cut from the annealed ingots for 3-5 μm optical parametric oscillation (OPO) experiments. For OPO experiment, we obtained up to 8.7 W output in the 3-5 μm wavelength range (with signal of 3.80 μm and idler of 4.45 μm, respectively) pumped by a 16.3 W 2.05 μm Tm,Ho:GdVO_4 laser at pulse repetition rate of 10 kHz, which corresponded to a conversion efficiency of 53.4% and slope efficiency of 64.8%, respectively.
机译：ZnGeP_2单晶通过Vertical Bridgman方法生长。获得了直径为30 mm，长度为120 mm的高质量近化学计量的ZnGeP_2单晶。结果表明，对晶体进行热退火后，其光吸收系数在2.05μm时低于0.03 cm〜（-1），在3-8μm时约为0.02 cm〜（-1）。从退火的铸锭上切出尺寸为6×6×18 mm〜3的低吸收损耗ZnGeP_2样品，进行3-5μm光学参量振荡（OPO）实验。对于OPO实验，我们在脉冲重复率由16.3 W 2.05μmTm，Ho：GdVO_4激光器泵浦的3-5μm波长范围内获得了高达8.7 W的输出功率（信号分别为3.80μm和惰轮为4.45μm）。 10 kHz的频率，分别对应于53.4％的转换效率和64.8％的斜率。

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