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.

引用

页码：81 / 86

页数：6

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