阶跃相位整形的飞秒激光脉冲时间光强分布  

Intensity Distribution of the Shaped Femtosecond Laser Pulse by Step Phase Modulation

作　　者：黄云霞[1] 纪宪明[1] 徐淑武[1] HUANG Yunxia;JI Xianming;XU Shuwu(School of Sciences,Nantong University,Nantong 226019,China)

机构地区：[1]南通大学理学院,江苏南通226019

出　　处：《南通大学学报（自然科学版）》2020年第2期76-80,共5页Journal of Nantong University(Natural Science Edition)　

基　　金：南通大学青年教师境外研修基金项目。

摘　　要：利用飞秒超快脉冲相位整形方法,计算并研究了阶跃相位整形后激光脉冲的时域光强分布特点。研究结果表明,通过改变调制位置和调制深度,高斯激光脉冲可以整形形成强度可调的双脉冲结构,且子脉冲的中心时间和脉宽可以采用调制参数来调节。同时,研究发现阶跃位置的有效可调范围和激光的线宽密切相关。The intensity distribution of the step phase shaped femtosecond laser pulse by ultra-fast pulse shaping technique is studied.The results show that two sub-pulses with variable intensity can be developed from a Gaussian laser pulse by adjusting the step position and the modulation depth.The central time and the pulse width of the sub-pulses change with the modulation parameters as well.In addition,the results show that the effective adjustable range of the step position is closely related to the full width at half maximum of the transform-limited laser pulse.

关 键 词：超快脉冲整形技术 阶跃相位 调制参数 光强分布 

分 类 号：O56[理学—原子与分子物理]