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Effects of Relativistic and Ponderomotive Nonlinearities on an Intense Laser Pulse Propagation in a Plasma Channel |
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| Authors: | LIU Ming-Ping ZHENG Zhen LIU San-Qiu DAI Wei-Hua LIU Jie |
| Institution: | 1. College of Information Engineering, Nanchang University, Nanchang 330031, China; 2. Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, Beijing Normal University, Beijing 100875, China; 3. Department of Physics, Nanchang University, Nanchang 330047, China; 4. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China |
| Abstract: | The optical guiding of a moderately intense laser pulse in a parabolic preformed plasma channel is analyzed by means of the variational method.Relativistic,ponderomotive and their coupling nonlinearities are included.The conditions for periodic defocusing and focusing,as well as constant spot size propagation are given.It is found that the laser focusing is released by the coupling of relativistic and ponderomotive nonlinearities. |
| Keywords: | relativistic nonlinearity ponderomotive nonlinearity plasma channel |
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