| 发散光长程空气传输受激转动拉曼散射效应 |
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| 引用本文： | 周丽丹,徐冰,王芳,贾怀庭,韩伟,李富全,冯斌. 发散光长程空气传输受激转动拉曼散射效应[J]. 强激光与粒子束, 2013, 25(8): 1930-1934. DOI: 10.3788/HPLPB20132508.1930 |
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| 作者姓名： | 周丽丹 徐冰 王芳 贾怀庭 韩伟 李富全 冯斌 |
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| 作者单位： | 1.中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621 900 |
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| 摘 要： | 研究强激光长程空气传输受激转动拉曼散射(SRRS)效应，寻求抑制措施是高功率固体激光驱动器建造中需要解决的关键问题之一。采用数值模拟的方法研究了发散光长程空气传输SRRS效应的演化规律，通过几何近似理论推导了该效应有效建立时的强度距离乘积阈值和抑制判据。结果表明:发散光长程空气传输SRRS效应的建立速度小于平行光，二者阈值有理论关系；能够有效抑制SRRS效应的发散角设计判据由光束口径、激光强度及安全传输距离决定。
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| 关 键 词： | 强激光 非线性传输 SRRS效应 发散光 抑制判据 |
| 收稿时间： | 2013-01-21; |
Stimulated rotational Raman scattering in air with diverging beam |
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| Zhou Lidan,Xu Bing,Wang Fang,Jia Huaiting,Han Wei,Li Fuquan,Feng Bin. Stimulated rotational Raman scattering in air with diverging beam[J]. High Power Laser and Particle Beams, 2013, 25(8): 1930-1934. DOI: 10.3788/HPLPB20132508.1930 |
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| Authors: | Zhou Lidan Xu Bing Wang Fang Jia Huaiting Han Wei Li Fuquan Feng Bin |
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| Affiliation: | 1.Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China |
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| Abstract: | Investigation on stimulated rotational Raman scattering (SRRS) in air with high power laser to seek suppression methods is one of the key issues which needs to be addressed in the construction of high-power solid-state laser driver. The evolution of SRRS with diverging beam is studied numerically. The threshold of the intensity-path-length product and the criterion to suppress SRRS using diverging beam are established by geometric approximation. The results show that the effect of SRRS grows slowly in diverging beam, choosing proper divergence angle can suppress SRRS effectively, and the angle depends on the beam size, laser intensity and propagation distance. |
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| Keywords: | nonlinear propagation stimulated rotational Raman scattering effect diverging beam suppression criterion |
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