## Stochastic resonance and noise-enhanced transmission of spatial signals in optics: the case of scattering

JOSA B, Vol. 15, Issue 11, pp. 2674-2680 (1998)

http://dx.doi.org/10.1364/JOSAB.15.002674

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### Abstract

The nonlinear effect of noise-enhanced signal transmission by means of stochastic resonance in optics is studied. We investigate this effect for the novel case of spatial signals or images. With a theoretical model involving a threshold nonlinearity we describe a mechanism whereby the transmission of an image can be improved by the addition of noise. We argue that such a nonlinear mechanism can operate in different types of light scattering. With a stimulated Raman scattering experiment we verify the existence of a stochastic resonance effect in the transmission of a laser image; we show that maximal efficacy is obtained with the assistance of a speckle of sufficient intensity. The results extend the scope of stochastic resonance and can serve as a basis for further development of the effect in optics.

© 1998 Optical Society of America

**OCIS Codes**

(030.4280) Coherence and statistical optics : Noise in imaging systems

(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing

(100.0100) Image processing : Image processing

(110.2970) Imaging systems : Image detection systems

(190.0190) Nonlinear optics : Nonlinear optics

(190.5650) Nonlinear optics : Raman effect

**Citation**

Fabrice Vaudelle, José Gazengel, Geneviève Rivoire, Xavier Godivier, and Francois Chapeau-Blondeau, "Stochastic resonance and noise-enhanced transmission of spatial signals in optics: the case of scattering," J. Opt. Soc. Am. B **15**, 2674-2680 (1998)

http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-11-2674

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