A 18-W Signal Average Power Nanosecond LiB3O5 Optical Parametric Oscillator around 860 nm and the Beam Quality
A 18-W Signal Average Power Nanosecond LiB3O5 Optical Parametric Oscillator around 860 nm and the Beam Quality
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DOI：
10.1088/0256-307x/22/7/037
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发表时间：
2005-07
影响因子：
3.5
通讯作者：
Li Hui-Qing;Geng Ai-Cong;Bo Yong;Peng Qin-jun;Cui Da-Fu;Xu Zu-yan
中科院分区：
文献类型：
--
作者：
Li Hui-Qing;Geng Ai-Cong;Bo Yong;Peng Qin-jun;Cui Da-Fu;Xu Zu-yan
本文报道了一种由全固态纳秒532nm激光器泵浦的高平均功率光参量振荡器（OPO）。基于非临界相位匹配晶体无漂移效应的优点，采用60 mm长的LiB3O5 （LBO）晶体作为OPO非线性晶体，提高了转换效率和输出功率。当泵浦功率为65w时，在860nm处信号输出的最大平均功率可达18w。据我们所知，这是单块LBO中纳秒OPO产生的最高信号平均功率。研究了光束质量的动态特性。实验结果表明，在泵浦光束质量相对较差的情况下，可以获得良好的OPO转换效率和较高的输出功率。
We report a compact high average power optical parametric oscillator (OPO) pumped by an all-solid-state nanosecond 532-nm laser. Based on the merit of non-critically phase-matched crystals without walk-off effect, a 60-mm-long LiB3O5 (LBO) crystal is used as the OPO nonlinear crystal to enhance the conversion efficiency and to increase the output power. The maximum average power of signal output is up to 18 W at 860 nm for pump power of 65 W. This is the highest signal average power generated by a nanosecond OPO in single bulk LBO, to the best of our knowledge. The dynamic characteristics of beam quality are investigated. Our experimental results demonstrate that good OPO conversion efficiency and high output power can be obtained even with relatively poor pump beam quality.