摘要
通过数值求解非线性Schr¨odinger方程 ,详细讨论了环形斑光束在非线性克尔介质中的传输特性 .当入射光超过一定的功率时 ,光束产生多级自聚焦现象 ,自聚焦焦点出现在离轴的环上 ;自聚焦阈值与环形光束的半径有关 ;传输过程中光斑存在横向分裂现象 ,并且分裂与聚焦交替进行 ;当两个半径不同的同轴环状光束同时在非线性介质中传输时产生耦合效应 ,耦合效应使其自聚焦增强 .
The transmission of circle spot laser beam in Kerr-medium is investigated with solving nonlinear Schrdinger equation numerically. The spot splitting and splitting variation are observed in the transmission process if the laser beam power is above a certain value. The critical power is related with the radius of the circle spot laser beam. It is also discovered the coupling between the double coaxial circles laser beams if they pass through Kerr-medium.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2003年第2期204-208,共5页
Acta Photonica Sinica
基金
教育部骨干教师基金 (批准号 :2 0 0 0 6 5 )资助项目
关键词
环形斑激光束
克尔介质
非线性传输
自聚焦
Circle spot laser beam
Kerr-medium
Nonlinear transmission
Self-focusing
