外腔式宽调谐被动调Q Nd:YVO<sub>4</sub>/PPMgLN光学参量振荡器

林洪沂; 苗杰光; 檀慧明; 苏少昌; 崔铁成; 郭劲

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外腔式宽调谐被动调Q Nd:YVO₄/PPMgLN光学参量振荡器

1.
中国科学院长春光学精密机械与物理研究所, 长春 1 30033;
2.
中国科学院研究生院, 北京 1 00049;
3.
哈尔滨工业大学威海光电科学系, 山东威海 264209;
4.
中国白城63861 部队, 吉林白城 1 37000

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出版历程
- 刊出日期: 2010-01-01

Extra-cavity, wide-tunable, passively Q-switched Nd:YVO4/PPMgLN optical parametric oscillator

1.
Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100049,China;
3.
Department of Optoelectronic Science,Harbin Institute of Technology,Weihai 264209,China;
4.
63861 Armed Forces of Chinese Baicheng,Baicheng 137000,China

摘要

摘要: 报道了一个低阈值宽调谐、被动调Q、单谐振掺MgO的周期性极化铌酸锂晶体（PPMgLN）光学参量振荡器。利用被动调Q的Nd:YVO4激光器作为泵浦源，采用外腔结构，在室温下，实现了PPMgLN晶体的准相位匹配光学参量振荡。光参量振荡的阈值仅为0.27 W（单脉冲能量4.5 μJ、脉宽35 ns）；在泵浦光为1（脉冲能量8.2 μJ、脉宽35 ns），PPMgLN周期为31 μm时，获得了161.9 mW,3.202 μm脉冲激光输出；同时获得了98.5 mW的1.594 μm信号光输出，总的光-光转化效率达到19.3%。通过改变晶体的周期，实现了闲频光3.13~4.19 μm，信号光1.43~1.65 μm的宽带可调谐激光输出。
- 非线性光学 /
- 光学参量振荡器 /
- 被动调Q /
- PPMgLN /
- 可调谐
Abstract: A wide-tunable, low-threshold, extra-cavity singly resonant optical parametric oscillator(OPO) has been reported, which is based on periodically poled MgO:LiNbO3 (PPMgLN). The OPO system, compact and simple, adopts a passively Q-switched Nd:YVO4 laser as the pump source and realizes quasi-phase-matched optical parametric oscillation at room temperature. The threshold value of the OPO system is only 0.27 W (single pulse energy of 4.5 μJ, pulse duration of 35 ns) at 1 064 nm. When the pump power is 1.35 W (pulse energy of 8.2 μJ, pulse duration of 35 ns), an idler output power of 161.9 mW at 3.202 μm, and a signal output power of 98.5 mW at 1.594 μm have been achieved, and this corresponds to a whole (idler+signal) optic-optic conversion efficiency of 19.3%. By shifting the PPMgLN crysta
- nonlinear optics /
- optical parametric oscillator /
- passively q-switched /
- ppmgln /
- tunable