Investigation of stimulated rotational Raman scattering of the high-power broadband laser with applied angular dispersion  

作　　者：樊心民 吕志伟 林殿阳 刘颖 朱成禹 何伟明 丁磊 

机构地区：[1]National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology [2]Research Center of Laser Fusion, China Academy of Engineering Physics

出　　处：《Chinese Physics B》2013年第12期276-279,共4页中国物理B（英文版）

基　　金：Project supported by the State Key Program of the National Natural Science Foundation of China(Grant No.61138005);the National Natural Science Foundation of China(Grant No.61008004)

摘　　要：Smoothing by spectral dispersion （SSD） leads to considerable improvement on laser-irradiation uniformity in far field for fusion lasers. Phase modulation in time and spectral angular dispersion （SAD） across the beam introduced by SSD will affect the stimulated rotational Raman scattering （SRRS） gain in the near field. This paper focuses on the influence of SAD on SRRS gain under different laser conditions. Results show that the SAD will aggravate the generation of SRRS when the laser initial additional phase is constant. On the contrary, the SAD can reduce the SRRS gain if appropriate SSD parameters are adopted when the laser initial additional phase is variable. SSD has a certain application prospect in SRRS suppression.Smoothing by spectral dispersion （SSD） leads to considerable improvement on laser-irradiation uniformity in far field for fusion lasers. Phase modulation in time and spectral angular dispersion （SAD） across the beam introduced by SSD will affect the stimulated rotational Raman scattering （SRRS） gain in the near field. This paper focuses on the influence of SAD on SRRS gain under different laser conditions. Results show that the SAD will aggravate the generation of SRRS when the laser initial additional phase is constant. On the contrary, the SAD can reduce the SRRS gain if appropriate SSD parameters are adopted when the laser initial additional phase is variable. SSD has a certain application prospect in SRRS suppression.

关 键 词：spectral angular dispersion smoothing by spectral dispersion rotational Raman scattering 

分 类 号：O437.3[机械工程—光学工程]