在降雨条件下，多普勒效应后毫米波脉冲频谱发生展宽和压缩。
The spread and compress of millimeter wave pulse frequency spectrum will happen in Doppler Effect during rain.
通过数值模拟，研究了波长转换过程，观察到脉冲传播过程中出现了走离效应与脉冲展宽。
The process of the wavelength conversion is analyzed by numerical simulation and walk-off effect and pulse broadening have been observed in pulse propagations.
由于载流子引起的群速度色散效应，使远离饱和区工作的TW-SLA会对有频率啁啾的光脉冲产生展宽或压缩。
The chirped pulses will be compressed or broadened because of carrier-induced group-velocity dispersion when TW-SLA operates far below saturation.
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