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Coherent anti-Stokes Raman scattering spectral interferometry with large spectral phase gradient induced by highly dispersive optical elements

机译:高色散光学元件引起的具有大光谱相位梯度的相干反斯托克斯拉曼散射光谱干涉法

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摘要

In a conventional coherent anti-Stokes Raman scattering (CARS) microscope system, we generate a localnoscillator CARS field and a sample CARS field successively along a single-beam path. A large gradient ofnrelative spectral phase between the two fields is naturally induced by highly dispersive microscope elements.nThe resulting spectral interferogram is a form of fast varying sinusoidal fringes modulated by the amplitudenand phase of the sample CARS field. With the help of the Hilbert transform on the heterodyne part of theninterferogram, both real and imaginary quadratures of the sample CARS spectrum are extracted with annimproved signal-to-noise ratio. © 2008 Optical Society of AmericanOCIS codes: 300.6230, 120.3180.
机译:在传统的相干反斯托克斯拉曼散射(CARS)显微镜系统中,我们沿单光束路径依次生成了一个本地振荡器CARS场和一个样品CARS场。高度分散的显微镜元件自然会在两个场之间产生一个较大的光谱相位梯度。借助于Hilbert变换对干涉图的外差部分,以改善的信噪比提取了样品CARS频谱的实部和虚部正交。 ©美国光学学会2008年OCIS代码:300.6230、120.3180。

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  • 来源
    《Optics Letters》 |2008年第24期|p.3016-3018|共3页
  • 作者单位

    Division of Advanced Technology, Korea Research Institute of Standards and Science,Daejeon 305-340, South Korea* Corresponding author: jaeyong@kriss.re.kr;

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