Signal-to-noise ratio improvement by stochastic resonance in a unidirectional photorefractive ring resonator.
All-optical signal-to-noise ratio improvements by stochastic resonance have been obtained by use of the intensity bistability of a unidirectional photorefractive ring resonator. A signal-to-noise ratio gain of 10.5 dB has been obtained with a near-unity signal-to-noise ratio input signal at 6 mHz.
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Jost
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Saleh