高功率激光整形脉冲波形控制技术
Waveform control technique of high power laser pulse shaping
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摘要: 针对神光-Ⅲ原型装置物理实验要求的三台阶整形脉冲（三个台阶的脉冲宽度比为1.5∶1.0∶0.5，强度比为1∶4∶16，脉冲总能量为500 J），并根据该装置的系统构成和具备任意脉冲整形技术，开展了高功率激光整形脉冲波形控制技术研究，通过对基频光段的增益饱和效应和三倍频光的频率转换过程的分析，获得了脉冲时间波形在传输、放大及频率转换过程中的一些变化特点，在此基础上建立了一套简单的预测模型。经过反复迭代计算和多次全系统联机实验获得了实验结果,并在物理实验中得到了应用，初步形成了高功率激光整形脉冲波形的控制方法。Abstract: In order to achieve three-step pulse shaping (time proportion 1.5 ns∶1.0 ns∶0.5 ns, power proportion 1∶4∶16, total energy 500 J) required by the physical experiments on Shenguang-Ⅲ technical integration experimental line(TIL), some researches on waveform control of high power laser pulse shaping have been done on the basis of TIL system structure and the technology which can form arbitrary pulse waveform. By analyzing gain saturation effect and frequency conversion process, the paper gets the pulse change in transmission, amplification and frequency conversion processes, and builds a simple prediction model. Good experimental results are obtained by pulse waveform predicting, pulse shaping and repeated iteration of laser emission data, and used in the physical experiments. A prelimina
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Key words:
- high power laser facility /
- pulse shaping /
- prediction model /
- gain curve
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