162.6 mJ high-energy and high-efficiency KTP optical parametric oscillator at 2 μm

被引：0
|
作者：
刘育椿 [1 ,2 ]
宋贾俊 [1 ]
彭宇杰 [1 ]
李恩昊 [1 ]
龙应斌 [1 ]
孙剑宇 [1 ,3 ]
沈丽雅 [1 ,2 ]
刘寅飞 [1 ,3 ]
朱君泽 [1 ,3 ]
冷雨欣 [1 ,3 ]
徐至展 [1 ,2 ,3 ]
机构：
[1] Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
[2] School of Physical Science and Technology, Shanghai Tech University
[3] Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of
来源：
Chinese Optics Letters | 2025年 / 23卷 / 02期
关键词：
D O I：
暂无
中图分类号：
TN248 [激光器]; TN752 [振荡器];
学科分类号：
摘要：
A high-energy and high-efficiency 2 μm nanosecond optical parametric oscillator(OPO) with excellent energy stability is reported. The cavity adopts a plane–plane configuration with two potassium titanyl phosphate(KTP) crystals inserted using a spatial walk-off compensated orientation. The KTP-OPO is pumped by a 1064 nm Nd:YAG Q-switched laser at a repetition rate of 10 Hz and produces a maximum pulse energy of 162.6 m J at a pump energy of 431 m J, corresponding to an optical conversion efficiency of 37.7% and a slope efficiency of 45.2%. The energy stability shows a record root mean square(RMS) of0.4% over 30 min. To our knowledge, this represents the highest 2 μm pulse energy achieved via the 1 μm laser-pumped KTPOPO scheme, which could be an excellent laser source for driving extreme ultraviolet(EUV) radiations in the subsequent demonstration experiments.
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页码：81 / 86
页数：6
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