| 准相位匹配PPMgLN光参量振荡技术 |
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| 引用本文： | 彭跃峰,鲁燕华,谢刚,WANG Wei-min,王卫民. 准相位匹配PPMgLN光参量振荡技术[J]. 强激光与粒子束, 2007, 19(3): 377-380 |
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| 作者姓名： | 彭跃峰 鲁燕华 谢刚 WANG Wei-min 王卫民 |
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| 作者单位： | 中国工程物理研究院,应用电子学研究所,四川,绵阳,621900;中国工程物理研究院,应用电子学研究所,四川,绵阳,621900;中国工程物理研究院,应用电子学研究所,四川,绵阳,621900;中国工程物理研究院,应用电子学研究所,四川,绵阳,621900;中国工程物理研究院,应用电子学研究所,四川,绵阳,621900 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 理论上分析了PPMgLN光参量振荡波长调谐特性，计算了泵浦阈值和转换效率。准相位匹配情况下，周期调谐是获得中红外波长调谐有效方法之一。采用高斯光束泵浦，当泵浦功率密度超过阈值泵浦功率密度约6.5倍时，可以获得最高转换效率，约71%。采用1 064 nm激光泵浦多周期PPMgLN晶体，实验上获得了波长调谐范围2.7~4.8 mm，当泵浦功率为8 W时，在波长3.7 mm处激光输出功率超过1.6 W，斜效率超过20%，相应的转换效率约为69%，与理论分析基本一致。
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| 关 键 词： | 准相位匹配 周期极化铌酸锂 周期调谐 中红外 |
| 文章编号： | 1001-4322(2007)03-0377-04 |
| 收稿时间： | 2006-12-17 |
| 修稿时间： | 2006-12-17 |
Quasi-phase-matched optical parametric oscillator based on PPMgLN |
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| WANG Wei-min. Quasi-phase-matched optical parametric oscillator based on PPMgLN[J]. High Power Laser and Particle Beams, 2007, 19(3): 377-380 |
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| Authors: | WANG Wei-min |
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| Affiliation: | Institute of Applied Electronics, CAEP, P.O.Box 919-1013, Mianyang 621900, China |
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| Abstract: | Theoretical and experimental study is presented on grating period-tuned single-resonated quasi-phase-matched optical parametric oscillator in multi-grating periodically poled MgO-doped lithium niobate(PPMgLN) pumped by 1 064 nm laser. Theoretical analyses include grating period tuning, pump threshold and converting efficiency of PPMgLN SRO. The pump source is a acousto-optically Q-switched CW- diode- side- pumped Nd:YAG laser. The pump beam polarization matches the e→e+e interaction in PPMgLN, thus the maximum nonlinear coefficient (27.4 pm/V) is effective. When pump power is 8 W, an average output power of more than 1.6 W at 3.7 mm is obtained with a corresponding slope efficiency of more than 20%, and a tunable mid-infrared wavelength output from 2.7 to 4.8 mm is also obtained by gratin |
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| Keywords: | Quasi-phase-matching Periodically poled lithium niobate Grating period tuning Mid-infrared |
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