Shot noise limited heterodyne detection of CARS signals

M. Jurna; E. Büttner; J. P. Korterik; C. Otto; I. Rimke; H. L. Offerhaus

doi:10.1117/12.761641

15 February 2008 Shot noise limited heterodyne detection of CARS signals

M. Jurna, E. Büttner, J. P. Korterik, C. Otto, I. Rimke, H. L. Offerhaus

Proceedings Volume 6860, Multiphoton Microscopy in the Biomedical Sciences VIII; 68600R (2008) https://doi.org/10.1117/12.761641
Event: SPIE BiOS, 2008, San Jose, California, United States

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.

Citation Download Citation

M. Jurna, E. Büttner, J. P. Korterik, C. Otto, I. Rimke, and H. L. Offerhaus "Shot noise limited heterodyne detection of CARS signals", Proc. SPIE 6860, Multiphoton Microscopy in the Biomedical Sciences VIII, 68600R (15 February 2008); https://doi.org/10.1117/12.761641

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