Femtosecond time-resolved interferometry for the determination of complex nonlinear susceptibility.
Femtosecond time-resolved interferometry for the determination of complex nonlinear susceptibility.
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DOI：
10.1364/ol.16.001683
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发表时间：
1991-11
期刊：
影响因子：
3.6
通讯作者：
Kaoru Minoshima;Makoto Taiji;Takayoshi Kobayashi
中科院分区：
文献类型：
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作者：
Kaoru Minoshima;Makoto Taiji;Takayoshi Kobayashi
我们提出并证明了敏感的干涉测量，允许分离的真实的和虚部的非线性极化率与飞秒时间分辨率由一个单一的测量。一个特殊的参考干涉仪补偿条纹的任何波动，并提供高灵敏度，通过平均只有100个镜头与低重复率激光检测条纹偏移小至0.025拉德（λ/250）。该方法可以应用于具有光学各向异性和/或吸收的材料，具有高灵敏度。我们将该方法应用于两种材料，CS（2）和CdS（x）Se（1-x）微晶掺杂玻璃。
We propose and demonstrate sensitive interferometry that permits the separation of the real and imaginary parts of the nonlinear susceptibility with a femtosecond time resolution by a single measurement. A special reference interferometer compensates for any fluctuations of the fringe and provides high sensitivity to detect a fringe shift as small as 0.025 rad (lambda/250) by averaging only 100 shots with a low-repetition-rate laser. This method can be applied to materials with optical anisotropy and/or absorption with high sensitivity. We apply the method to two materials, CS(2) and CdS(x)Se(1-x) microcrystallite-doped glass.