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Characterization of three-color CARS in a two-pulse broadband CARS spectrum

机译:两脉冲宽带CARS光谱中的三色CARS的表征

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We demonstrate that a broadband coherent anti-Stokes Raman scattering (CARS) spectrum generated with a typical two-pulse scheme contains two distinct, significant signals: "2-color" CARS, where the pump and probe are provided by a narrowband pulse and the continuum pulse constitutes the Stokes light, and "3-color" CARS, where the pump and Stokes are provided by two different frequency components in the continuum pulse and the narrowband pulse serves as the probe. The CARS spectra from the two different mechanisms show distinct characteristics in Raman shift range, laser power dependence, and chirping dependence. We discuss the potential for a 3-color CARS signal to cover the fingerprint region with reduced photodamage of live cells. Official contribution of the National Institute of Standards and Technology; not subject to copyright in the United States.
机译:我们证明,使用典型的双脉冲方案生成的宽带相干反斯托克斯拉曼散射(CARS)频谱包含两个截然不同的重要信号:“ 2色” CARS,其中泵和探头由窄带脉冲提供,连续脉冲构成斯托克斯光,并且是“三色” CARS,其中泵浦和斯托克斯由连续脉冲中的两个不同频率分量提供,而窄带脉冲用作探针。来自两种不同机制的CARS光谱在拉曼位移范围,激光功率依赖性和线性调频依赖性方面显示出不同的特性。我们讨论了3色CARS信号覆盖活细胞光损伤减少的指纹区域的可能性。国家标准技术研究院的官方贡献;不受美国版权保护。

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