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Stimulated Raman backscattering from an ultrashort laser interacting with underdense plasmas |
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| Authors: | Tang Yu-Hui Han Shen-Sheng Zhang Chang-Xue Wu Yan-Qing Cheng Jing Zhong Fang-Chuan Zhu Yu-Zhe Xu Zhi-Zhan |
| Affiliation: | Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China |
| 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. |
| Keywords: | laser-plasma interactions stimulated Raman backscattering |
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