中国激光, 2002, 29 (5): 418, 网络出版: 2006-08-08
非线性增益介质中的小尺度自聚焦特性分析
Analysis of Small-scale Self-focusing Effects in Nonlinear Media with Gain
B-T理论 小尺度自聚焦 截止空间频率 最快增长频率 积分指数增益 B-T theory small scale self focusing cutoff spatial frequency the fastest growing frequency integral exponential gain
摘要
由光束在吸收(增益)介质中传输的非线性近轴波方程,推导出了光束在两种介质中传输时,由于小尺度调制的非线性增长所引起的小尺度自聚焦所满足的微分方程.进而讨论了光束在增益介质中传输时产生的小尺度自聚焦特性,得出了其截止频率、最快增长频率、纹波的积分指数增益等特性随各参量的变化,并推出了小尺度自聚焦产生的最小传输距离.
Abstract
The differential equation ,discribing the small scale self focusing effects caused by nonlinear growth of perturbation when laser beams are propagating in nonlinear media with gain(or loss), have been deduced from nonlinear propagational equation. Some characteristics of small scale self focusing of laser beams propagating in nonlinear media with gain have been analysed. Variations of cutoff spatial frequency, the fastest growing frequency, integral exponential gain of perturbation with different parameters have been specified.
林晓东, 王逍, 李大义, 陈建国. 非线性增益介质中的小尺度自聚焦特性分析[J]. 中国激光, 2002, 29(5): 418. 林晓东, 王逍, 李大义, 陈建国. Analysis of Small-scale Self-focusing Effects in Nonlinear Media with Gain[J]. Chinese Journal of Lasers, 2002, 29(5): 418.