Spatial-spectral coupling in coherent anti-Stokes Raman scattering microscopy
Coherent anti-Stokes Raman scattering (CARS) microscopy is a third-order nonlinear optical technique which permits label-free, molecule-specific hyperspectral imaging. The interference between coherent resonant and non-resonant terms leads to well known distortions in the vibrational spectrum, requi...
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Veröffentlicht in: | Optics express 2013-07, Vol.21 (13), p.15298-15307 |
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creator | Barlow, Aaron M Popov, Konstantin Andreana, Marco Moffatt, Douglas J Ridsdale, Andrew Slepkov, Aaron D Harden, James L Ramunno, Lora Stolow, Albert |
description | Coherent anti-Stokes Raman scattering (CARS) microscopy is a third-order nonlinear optical technique which permits label-free, molecule-specific hyperspectral imaging. The interference between coherent resonant and non-resonant terms leads to well known distortions in the vibrational spectrum, requiring the use of retrieval algorithms. It also leads to spatial imaging distortions, largely due to the Gouy phase, when objects are smaller than the Rayleigh range. Here we consider that the focal position and spectral contributions to the nonlinear image formation are intrinsically coupled and cannot be corrected by conventional retrieval methods. |
doi_str_mv | 10.1364/OE.21.015298 |
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title | Spatial-spectral coupling in coherent anti-Stokes Raman scattering microscopy |
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