中国物理B ›› 2002, Vol. 11 ›› Issue (1): 50-53.doi: 10.1088/1009-1963/11/1/311

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Stimulated Raman backscattering from an ultrashort laser interacting with underdense plasmas

汤宇晖, 韩申生, 张长学, 吴衍青, 程静, 钟方川, 朱喻哲, 徐至展   

  1. Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2001-03-28 修回日期:2001-09-09 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 69678012), and the National High Technology Development Programme of China (Grant No. 863-416-3).

Stimulated Raman backscattering from an ultrashort laser interacting with underdense plasmas

Tang Yu-Hui (汤宇晖), Han Shen-Sheng (韩申生), Zhang Chang-Xue (张长学), Wu Yan-Qing (吴衍青), Cheng Jing (程静), Zhong Fang-Chuan (钟方川), Zhu Yu-Zhe (朱喻哲), Xu Zhi-Zhan (徐至展)   

  1. Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2001-03-28 Revised:2001-09-09 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 69678012), and the National High Technology Development Programme of China (Grant No. 863-416-3).

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摘要： We present experimental results of the stimulated Raman backscattering instability (BSRS) in an ultrashort intense (45fs, 5.7×1017Wcm-2) laser pulse interacting with an optically ionized helium gas. We have studied the stimulated Raman backscattering reflectivity and the phenomenon of the transition from strongly coupled BSRS to weakly coupled BSRS. We have obtained a good agreement between our experimental results and the theory of BSRS.

Abstract: We present experimental results of the stimulated Raman backscattering instability (BSRS) in an ultrashort intense (45fs, 5.7×1017Wcm-2) laser pulse interacting with an optically ionized helium gas. We have studied the stimulated Raman backscattering reflectivity and the phenomenon of the transition from strongly coupled BSRS to weakly coupled BSRS. We have obtained a good agreement between our experimental results and the theory of BSRS.

Key words: laser-plasma interactions, stimulated Raman backscattering

中图分类号:  (Stimulated Raman scattering; CARS)

  • 42.65.Dr
52.38.Bv (Rayleigh scattering; stimulated Brillouin and Raman scattering) 42.60.Lh (Efficiency, stability, gain, and other operational parameters)