时域-频域精密调控光纤激光脉冲产生系统

发布时间：2018-03-22 17:32

  本文选题：激光光学　切入点：脉冲整形　出处：《中国激光》2017年06期 　论文类型：期刊论文

【摘要】：惯性约束聚变精密物理实验要求高功率激光驱动器具备时域-频域精密调控能力,以实现对激光与等离子体相互作用过程中非线性效应的抑制。基于保偏光纤和单偏振光纤技术,采用温度调谐双振荡器结合两级波导相位调制器实现激光脉冲频域精密调控,采用两级高速电光调制脉冲整形技术实现激光脉冲时域精密调控,将微波射频信号取样检测与声光开关进行连锁以确保整个系统的安全运行。实验获得了光谱带宽为0.15~0.3nm、中心波长范围为1052.4~1053.6nm的连续可调微焦耳级激光脉冲,波长调谐精度为0.1nm,在微焦级实现了对比度大于500…1的高对比度整形激光脉冲,脉冲时间波形顶部调制深度小于10%。
[Abstract]:The precision physical experiment of inertial confinement fusion requires that the high-power laser driver has the precision control ability in time-frequency domain. In order to suppress the nonlinear effect in the process of laser plasma interaction, based on polarization maintaining fiber and single polarization fiber technology, the temperature tuned double oscillator combined with two stage waveguide phase modulator is used to realize the precise control of laser pulse frequency domain. Using two stage high speed electro-optic modulation pulse shaping technology to realize laser pulse time domain precise control, The microwave RF signal sampling detection is linked to the acousto-optic switch to ensure the safe operation of the whole system. A continuous adjustable micro-joule laser pulse with a spectral bandwidth of 0.15 ~ 0.3nm and a center wavelength range of 1052.4~1053.6nm is obtained. The wavelength tuning accuracy is 0.1 nm. A high contrast shaping laser pulse with contrast greater than 500 鈥，

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