Phys.org May 27, 2021
Signals can be amplified by an optimum amount of noise, but stochastic resonance (SR) is a fragile phenomenon. To investigate the role of memory for this phenomenon an international team of researchers (the Netherlands, UK) used an oil-filled microcavity which, driven by a continuous wave laser, has memory in its nonlinear optical response. Modulating the cavity length while adding noise to the driving laser, they observed a peak in the transmitted signal-to-noise ratio as a function of the noise variance. Through simulations, they reproduced their observations and extrapolated that the SR bandwidth could be approximately 3000 times larger in our cavity than in a Kerr-nonlinear cavity. This has implications in many fields of physics and energy technology…read more. TECHNICAL ARTICLEÂ
… An optimum amount of noise amplifies this signal when the conditions of stochastic resonance have been met. Credit: Henk-Jan Boluijt (AMOLF)