Background free CARS imaging by phase sensitive heterodyne CARS

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Jurna, M. and Korterik, J.P. and Otto, C. and Herek, J.L. and Offerhaus, H.L. (2008) Background free CARS imaging by phase sensitive heterodyne CARS. Optics Express, 16 (20). pp. 15863-15869. ISSN 1094-4087

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Abstract: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.
Item Type:Article
Additional information:Open access article
Copyright:© 2008 Optical Society of America
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/60476
Official URL:http://dx.doi.org/10.1364/OE.16.015863
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