时域延时多脉冲叠加平滑过程的分析
Analysis of pulse smoothing by multi-pulse interference in time domain
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摘要: 为满足惯性约束聚变对ns级可整形激光脉冲的独特要求,提出了一种将多脉冲延迟堆积实现脉冲平滑和灵活整形的方案。这种方案基于多光束耦合器与压电陶瓷结合技术，采用光纤作为传输介质，可以精确控制相邻脉冲延时。详细分析和讨论了时延多脉冲叠加原理和叠加技术，给出了脉冲堆积时满足平滑要求的延迟时间(约为堆积所用高斯脉冲束腰宽度)和相邻脉冲间延时相位差所需的控制精度。Abstract: In the inertial confinement fusion (ICF) system, there exists a special requirement of waveform of the laser pulse(a shaping pulse with a width of ns). This paper proposes a coherent pulse stacking method which can make the output stacking pulse meet the requirement of the ICF. It theoretically and technologically investigates the multi-pulse interference in time domain, derives the range of time detention (about the width of the single Gaussian pulse) and the phase control accuracy of neighbor pulses to achieve the requirement of smoothing.
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Key words:
- pulse /
- smoothing /
- multi-pulse interference /
- time detention /
- phase
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