Small-Scale Self-Focusing of Intense Laser Beams In the Presence of Vector Effect

作     者：WEN Shuang-Chun FAN Dian-yuan 文双春;范滇元

作者机构：National Laboratory on High Power Laser and PhysicsShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2000年第17卷第10期

页      面：731-733页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：Supported by the High Technology Research and Development Program of China(Grant No.863-416-5) 

主　　题：Focus Small Presence 

摘      要：We extend Bespalov-Talanov (B-T) theory on small-scale self-focusing (SSSF) to include vector effect of a very narrow intense laser beam with application of the vector self-focusing model. The gain spectrum for perturbations is obtained by using the standard linear instability analysis. It is shown that the influence on SSSF of vector effect is closely related to the beam width. For a very narrow beam, the role played by vector effect becomes significant, it reduces the fastest growing frequency and the maximum growth rate, and shortens the frequency range for perturbation growing, and thus deviates the gain spectrum from that of B-T theory.