自参考光谱干涉技术原理及应用

发布时间：2018-03-23 11:35

本文选题：自参考光谱干涉　切入点：飞秒脉冲　出处：《应用激光》2017年05期

【摘要】：在啁啾脉冲放大飞秒激光系统中,为了获得近傅里叶变换极限的超短飞秒脉冲输出,需要对飞秒脉冲的光谱相位进行测量并消除未被补偿的残留啁啾。而光谱干涉仪因为其线性性、结构简单和灵敏度高等优点在飞秒脉冲光谱相位测量方面具有重要应用。介绍了基于交叉偏振波或自衍射效应的自参考光谱干涉技术,详细论述了该技术的工作原理。特别地以高斯光谱入射脉冲为例,对待测脉冲的光谱相位重构进行了详细的数值模拟,并指出基于交叉偏振波及自衍射效应的自参考光谱干涉技术对线性啁啾的测量范围。最后简单介绍利用光谱干涉仪和声光可编程色散滤波器相结合,用以消除飞秒激光脉冲中光谱相位残留啁啾的原理,实验中通过2次反馈迭代就获得了近傅里叶变换极限的飞秒脉冲输出。
[Abstract]:In order to obtain ultrashort femtosecond pulse output with near Fourier transform limit in a chirped pulse amplification femtosecond laser system, The spectral phase of the femtosecond pulse needs to be measured and the residual chirp is eliminated. The advantages of simple structure and high sensitivity have important applications in femtosecond spectral phase measurement. The self-reference spectral interferometry based on cross-polarization wave or self-diffraction effect is introduced. The working principle of this technique is discussed in detail. Especially, taking Gao Si spectral incident pulse as an example, the spectral phase reconstruction of the measured pulse is simulated in detail. The measurement range of linear chirp using self-reference spectral interferometry based on cross-polarization and self-diffraction effect is pointed out. Finally, the combination of spectral interferometer and acousto-optic programmable dispersion filter is introduced briefly. Based on the principle of eliminating the residual chirp of spectral phase in femtosecond laser pulses, the output of femtosecond pulses with near Fourier transform limit is obtained by two feedback iterations.
【作者单位】：中国工程物理研究院激光聚变研究中心等离子体物理重点实验室;
【基金】：国家自然科学基金资助项目(项目编号:11504349) 中国工程物理研究院重点基金资助项目(项目编号:2014A0102003)
【分类号】：TH744;TN24

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