强激光与粒子束, 2016, 28 (10): 109002, 网络出版: 2016-09-14
单块KTA晶体级联光参量振荡2.6 μm激光器
Cascaded OPO based on single KTA crystal for 2.6 μm laser generation
2.6 μm波段 光参量振荡器 KTA晶体 非临界相位匹配 2.6 μm waveband optical parametric oscillator KTA crystal non-critical phase match
摘要
提出了一种新型的基于非临界相位匹配KTA晶体的自级联光参量振荡(OPO)激光技术。采用LD端面泵浦Nd:YVO4晶体实现1.06 μm振荡,腔内泵浦按非临界相位匹配角度切割的KTA晶体,将KTA晶体初次OPO产生的1.5 μm信号光封闭在腔内用作二次OPO的泵浦光,实现基于单块KTA晶体自级联OPO的转化。在输出功率8 W的808 nm波长半导体激光泵浦下获得输出功率超过400 mW、斜效率12.7%的2.6 μm波长激光输出。结果表明基于单块KTA晶体的级联光参量振荡激光器可望成为获得脉冲2.5~2.7 μm波段中红外激光的有效途径。
Abstract
Cascaded OPO based on single non-critical phase matching KTA crystal was proposed. The fundamental oscillation at 1.06 μm was achieved by LD end-pumped Nd: YVO4 crystal laser, then the non-critical phase matching cut KTA crystal was intra-cavity pumped. The 1.53 μm signal light produced by KTA-OPO was confined in the OPO cavity to realize the second OPO conversion in the same KTA crystal. Under 8 W incident diode pump power at 808 nm, a power exceeding 400 mW and slope efficiency of 12.7% at 2.6 μm were achieved based on cascaded OPO. Results show that the cascaded KTA-OPO is an efficient way to achieve 2.5-2.7 μm pulsed laser.
段延敏, 朱海永, 阮秀凯, 黄晓虹, 崔桂华, 张耀举, 王鸿雁. 单块KTA晶体级联光参量振荡2.6 μm激光器[J]. 强激光与粒子束, 2016, 28(10): 109002. Duan Yanmin, Zhu Haiyong, Ruan Xiukai, Huang Xiaohong, Cui Guihua, Zhang Yaoju, Wang Hongyan. Cascaded OPO based on single KTA crystal for 2.6 μm laser generation[J]. High Power Laser and Particle Beams, 2016, 28(10): 109002.
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