An exact solution to paraxial propagation of laser beams in longitudinal inhomogeneous plasmas  

作　　者：周并举 黄正 刘明伟 刘小娟 

机构地区：[1]School of Physics, Hunan University of Science and Technology, Xiangtan 411201, China [2]Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China

出　　处：《Chinese Physics B》2007年第9期2721-2724,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 19874020） and the Natural Science Foundation of Hunan Province, China （Grant No 05JJ30004）.

摘　　要：An exact, general solution for laser beams propagating in longitudinally inhomogeneous plasmas is obtained in the form of the diffraction integral. The Gaussian beam and the Hermite-Gaussian beam are taken for example. In the case of an increasing plasma density along the propagation distance, natural diffraction of the Gaussian beam is retarded. This retardance has a less effect on the central part of the Hermite-Gaussian beam while a considerable rise of the power in bucket （PIB） occurs in the surrounding part of the beam.An exact, general solution for laser beams propagating in longitudinally inhomogeneous plasmas is obtained in the form of the diffraction integral. The Gaussian beam and the Hermite-Gaussian beam are taken for example. In the case of an increasing plasma density along the propagation distance, natural diffraction of the Gaussian beam is retarded. This retardance has a less effect on the central part of the Hermite-Gaussian beam while a considerable rise of the power in bucket （PIB） occurs in the surrounding part of the beam.

关 键 词：inhomogeneous plasmas laser beam paraxial propagation exact solution 

分 类 号：O4[理学—物理]