13 February 2009 Background free CARS imaging by local phase detection
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In this article we show that heterodyne CARS, based on a controlled and stable phase-preserving chain, can be used to measure amplitude and phase information of molecular vibration modes. The technique is validated by a comparison of the imaginary part of the heterodyne CARS spectrum to the spontaneous Raman spectrum of polyethylene. The detection of the phase allows for rejection of the non-resonant background from the data. The resulting improvement of the signal to noise ratio is shown by measurements on a sample containing lipid.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Jurna, M. Jurna, J. P. Korterik, J. P. Korterik, C. Otto, C. Otto, L. Herek, L. Herek, H. L. Offerhaus, H. L. Offerhaus, } "Background free CARS imaging by local phase detection", Proc. SPIE 7183, Multiphoton Microscopy in the Biomedical Sciences IX, 718310 (13 February 2009); doi: 10.1117/12.807714; https://doi.org/10.1117/12.807714

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