Shot noise limited heterodyne detection of CARS signals

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

Preview

PDF
103Kb

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
Copyright:	© 2007 Optical Society of America
Faculty:	Science and Technology (TNW)
Research Group:	Optical Sciences (OS) Medical Cell BioPhysics (MCBP)
Link to this item:	http://purl.utwente.nl/publications/60477
Official URL:	http://dx.doi.org/10.1364/OE.15.015207
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Repository Staff Only: item control page

Metis ID: 242114