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Allowable propagation of short pulse laser beam in a plasma channel and electromagnetic solitary waves |
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| Authors: | Shan Zhang Xue-Ren Hong Hong-Yu WangBai-Song Xie |
| Institution: | a College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China b Department of Mathematics and Physics, Shijiazhuang Tiedao University, Shijiazhuang 050043, China c College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China d Department of Physics, Anshan Normal University, Anshan, 114005, China |
| Abstract: | Nonparaxial and nonlinear propagation of a short intense laser beam in a parabolic plasma channel is analyzed by means of the variational method and nonlinear dynamics. The beam propagation properties are classified by five kinds of behaviors. In particularly, the electromagnetic solitary wave for finite pulse laser is found beside the other four propagation cases including beam periodically oscillating with defocussing and focusing amplitude, constant spot size, beam catastrophic focusing. It is also found that the laser pulse can be allowed to propagate in the plasma channel only when a certain relation for laser parameters and plasma channel parameters is satisfied. For the solitary wave, it may provide an effective way to obtain ultra-short laser pulse. |
| Keywords: | Electromagnetic solitary wave Plasma channel Optical guiding Laser-plasma interaction |
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