中国激光, 2009, 36 (s2): 7, 网络出版: 2009-12-30   

1.35 W,3.85-3.95 μm连续调谐周期极化掺镁铌酸锂光参量振荡器

Continuous Tuning of a 3.85-3.95 μm,1.35 W Optical Parametric Oscillator Based on PPMgLN
作者单位
中国科学院 半导体研究所全固态光源实验室,北京 100083
摘要
周期极化掺镁铌酸锂光参量振荡器(PPMgLN OPOs)是输出高功率、可连续调谐中红外(MIR)激光的理想光源,在激光光谱仪、大气探测、红外信息对抗等应用方面具有很大优势。理论上分析了PPMgLN光参量振荡器的温度调谐特性,计算了脉冲运转单谐振光参量振荡器(SRO)抽运阈值。采用偏振Nd:YAG调Q激光(1064 nm)抽运PPMgLN晶体组成光参量振荡器,抽运阈值功率为1.7 W,与理论计算值接近。当抽运功率为12.3 W时,在波长3.93 μm处获得1.35 W闲频光输出。晶体温度在60-140 ℃范围变化,获得波长3.846-3.952 μm闲频光连续调谐输出,与理论调谐曲线吻合很好。
Abstract
Optical parametric oscillators based on periodically poled MgO-doped lithium niobate (PPMgLN OPOs) are ideal sources for high-power,continuously tunable mid-infrared (MIR) light,which is attractive for applications including laser spectroscopy,atmosphere detection and MIR countermeasure. In this paper,temperature tuning characteristic of PPMgLN OPO and oscillation threshold of pulsed SRO are analyzed theoretically. An OPO with PPMgLN pumped by Nd:YAG (1064 nm) Q-switched polarized laser is reported. The oscillation threshold is 1.7 W,which is close to the theoretical result. Idler output power of 1.35 W at 3.93 μm is achieved with pump power of 12.3 W. Idler wavelength output is tuned continuously from 3.846 to 3.952 μm with temperature varied from 60 to 140 ℃,which is in accordance with the theoretical tuning curve.

熊波, 马建立, 林学春, 李晋闽. 1.35 W,3.85-3.95 μm连续调谐周期极化掺镁铌酸锂光参量振荡器[J]. 中国激光, 2009, 36(s2): 7. Xiong Bo, Ma Jianli, Lin Xuechun, Li Jinmin. Continuous Tuning of a 3.85-3.95 μm,1.35 W Optical Parametric Oscillator Based on PPMgLN[J]. Chinese Journal of Lasers, 2009, 36(s2): 7.

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