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.
© 1996 Optical Society of America
Original Manuscript: August 15, 1995
Published: February 15, 1996
Bradley M. Jost and Bahaa E. A. Saleh, "Signal-to-noise ratio improvement by stochastic resonance in a unidirectional photorefractive ring resonator," Opt. Lett. 21, 287-289 (1996)