超短光脉冲感应级联五阶非线性相移分析

Generation of the Cascaded Fifth-Order Nonlinear Phase Shifts with Femtosecond Pulse

由于群速度失配的影响,飞秒光脉冲在感应到FONPS(级联五阶非线性相移)的同时,将不可避免地发生脉冲畸变。通过理论分析及数值模拟,提出了使级联五阶非线性过程运行在较大相位失配条件下的解决方案,成功地消除了脉冲畸变。并且借助于该过程中倍频效率的提高,有效地补偿由于相位失配量的增大所造成的FONPS的下降,实现飞秒基频光脉冲在感应到大的FONPS的同时无脉冲畸变发生。

Due to group velocity mismatch, the generation of the cascaded fifth-order nonlinear phase shifts with femtosecond pulse will inevitably cause the severe pulse distortion.By theoretical study and numerical simulation, we show that undistorted femtosecond pulse which is impressed the cascaded fifth-order nonlinear phase shifts can be obtioned at large value of the phase mismatching.