Aperiodic signals processing via parameter-tuning stochastic resonance in a photorefractive ring cavity

• Main Authors: Xuefeng Li, Guangzhan Cao, Hongjun Liu
• Format: Article
• Language: English
• Published: AIP Publishing LLC 2014-04-01
• Series: AIP Advances
• Online Access: http://dx.doi.org/10.1063/1.4871406

Based on solving numerically the generalized nonlinear Langevin equation describing the nonlinear dynamics of stochastic resonance by Fourth-order Runge-Kutta method, an aperiodic stochastic resonance based on an optical bistable system is numerically investigated. The numerical results show that a parameter-tuning stochastic resonance system can be realized by choosing the appropriate optical bistable parameters, which performs well in reconstructing aperiodic signals from a very high level of noise background. The influences of optical bistable parameters on the stochastic resonance effect are numerically analyzed via cross-correlation, and a maximum cross-correlation gain of 8 is obtained by optimizing optical bistable parameters. This provides a prospective method for reconstructing noise-hidden weak signals in all-optical signal processing systems.