小宽带堆积啁啾脉冲传输放大特性

 采用啁啾脉冲堆积的方法可获得ns量级宽带整形激光脉冲，对堆积啁啾脉冲时间波形的影响因素及传输放大后脉冲波形与光谱形状的特性进行了研究。结果表明：在传输过程中脉冲的演化规律与窄带脉冲的演化规律基本一致，而且传输放大过程也不会改变脉冲的调制结构，但光谱形状在传输放大过程中发生了变化，初步认为是由非线性效应造成的；小宽带堆积啁啾脉冲具有与窄带脉冲基本一致的的增益水平。

Characteristics of amplification transmission of stacked chirped pulse

The broadband nanosecond shaped laser pulse obtained by chirped pulse stacking(CPS) method can make the output stacked pulse meet the requirement of the inertial confinement fusion(ICF).However,temporal pulse shape modulation will come forth due to the pulse coherence of stacked chirped pulses,so will spectrum modulation.Factors influencing stacked chirped pulse waveshape and characteristics of the amplification process of stacked chirped pulse were studied.Results show that the evolution law of stacked chirped pulses is consistent with that of narrow band pulses,and the time modulation structure does not change in the amplification process.However,the spectrum modulation changes,which could be preliminarily inferred from the nonlinear effect.The stacked chirped pulse has a gain ability comparable to that of the narrowband pulse.