Shot noise limited heterodyne detection of CARS signals

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Jurna, M. and Búttner, E. and Korterik, J.P. and Otto, C. and Rimke, I. and Offerhaus, H.L. (2008) Shot noise limited heterodyne detection of CARS signals. In: Multiphoton Microscopy in the Biomedical Sciences VIII. Proceedings of SPIE, 6860 . SPIE, 68600R.

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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 ampli¯cation by the local oscillator re-
veals a window for shot noise limited detection before the signal-to-noise is limited by amplitude °uctuations. 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:Book Section
Copyright:©2008 COPYRIGHT SPIE
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/72663
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