Low Threshold and High Conversion Efficiency Nanosecond Mid-Infrared KTA OPO
Low Threshold and High Conversion Efficiency Nanosecond Mid-Infrared KTA OPO
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DOI：
10.1088/0256-307x/26/12/124213
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发表时间：
2009-12
影响因子：
3.5
通讯作者：
Zhong Kai;Liu Jian-song;Cui Haixia;XU Deng-Gang;Wang Yu-Ye;Zhou Rui;Wang Jing-Li;Wang Peng;Yao Jian-quan
中科院分区：
文献类型：
--
作者：
Zhong Kai;Liu Jian-song;Cui Haixia;XU Deng-Gang;Wang Yu-Ye;Zhou Rui;Wang Jing-Li;Wang Peng;Yao Jian-quan
基于第二类非临界位相匹配KTA晶体，实现了二极管端面泵浦的低阈值、高转换效率的中红外光学参量振荡器。最大输出功率为435 mW，重复频率为30μ，光-光转换效率为4.4%。光子转换效率高达%左右。脉冲宽度为3.5 ns，最大输出功率峰值功率为4kW。
Based on a Type II non-critically phase-matched KTA crystal, a low-threshold and high conversion efficiency mid-infrared optical parametric oscillator (OPO) pumped by a diode-end-pumped Nd:YVO4 laser is demonstrated. The OPO threshold is only 0.825 W. The maximum output power of 435mW at 3.47 μm is achieved with the repetition rate of 30 kHz, corresponding to an optical-to-optical conversion efficiency of 4.4%. The photon conversion efficiency is as high as about 64%. The pulse width is 3.5 ns with a peak power of 4kW for the maximum output power.