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首页> 外文期刊>Optics Letters >Enhanced spectral resolution for broadband coherent anti-Stokes Raman spectroscopy
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Enhanced spectral resolution for broadband coherent anti-Stokes Raman spectroscopy

机译:增强宽带相干反斯托克斯拉曼光谱的频谱分辨率

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The spectral resolution of broadband Fourier-transform coherent anti-Stokes Raman spectroscopy is limited by the maximum optical path length difference that can be scanned within a short time in an interferometer. However, alternatives to the Fourier transform exist which can bypass this limitation with certain assumptions. We apply one such approach to broadband coherent Raman spectroscopy using interferometers with a short delay line (low Fourier spectral resolution) and large delay line (high Fourier spectral resolution). With this method, we demonstrate that broadband coherent Raman spectroscopy of closely spaced vibrational bands is possible using a short delay line interferometer with comparable spectral resolution to the longer delay line instrument. We discuss how this approach may be particularly useful for more complex Raman spectra, such as those measured from biological samples. (C) 2020 Optical Society of America
机译:宽带傅里叶变换相干抗斯托克斯拉曼光谱的光谱分辨率受到在干涉仪中的短时间内可以扫描的最大光路长度差的限制。 然而,存在傅里叶变换的替代方案,其可以通过某些假设绕过这种限制。 我们使用具有短延迟线(低傅里叶谱分辨率)和大延迟线(高傅里叶谱分辨率)的干涉仪应用一种宽带相干拉曼光谱法的一种方法。 利用这种方法,我们证明使用具有可比延迟线仪器的短延迟线干涉仪来实现紧密间隔的振动带的宽带相干拉曼光谱。 我们讨论这种方法如何对更复杂的拉曼光谱特别有用,例如从生物样品中测量的那些。 (c)2020美国光学学会

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