Shot noise limited heterodyne detection of CARS signals

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Jurna, M. and Korterik, J.P. and Otto, C. and Offerhaus, H.L. (2007) Shot noise limited heterodyne detection of CARS signals. Optics Express, 15 (23). pp. 15207-15213. ISSN 1094-4087

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Abstract:We demonstrate heterodyne detection of CARS signals using a cascaded phase-preserving chain to generate the CARS input wavelengths and a coherent local oscillator. The heterodyne amplification by the local oscillator reveals a window for shot noise limited detection before the signal-to-noise is limited by amplitude fluctuations. We demonstrate an improvement in sensitivity by more than 3 orders of magnitude for detection using a photodiode. This will enable CARS microscopy to reveal concentrations below the current mMolar range.
Item Type:Article
Additional information:Open access article
Copyright:© 2007 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/60477
Official URL:http://dx.doi.org/10.1364/OE.15.015207
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