Shot noise limited heterodyne detection of CARS signals | Zendy

M. Jurna | Zendy; Jeroen P. Korterik | Zendy; Cornelis Otto | Zendy; Herman L. Offerhaus | Zendy

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Shot noise limited heterodyne detection of CARS signals

Author(s) -

M. Jurna,

Jeroen P. Korterik,

Cornelis Otto,

Herman L. Offerhaus

Publication year - 2007

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.15.015207

Subject(s) - optics , heterodyne (poetry) , heterodyne detection , local oscillator , shot noise , phase noise , noise (video) , physics , photodiode , signal (programming language) , sensitivity (control systems) , detector , laser , computer science , acoustics , electronic engineering , artificial intelligence , image (mathematics) , programming language , engineering

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.

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