Experimental evidence of "vibrational resonance" in VCSELs

The experimental evidence and characterization of "vibrational resonance" in a VCSEL are reported The system is driven by two summed forcings, having frequencies different by several orders of magnitude. It is studied in two cases: symmetrical and asymmetrical internal quasipotentials. The phenomenon shows lip in the dynamics of the polarized laser emission as a resonance in the low-frequency response and reaching a maximum of the signal-to-noise ratio, depending oil the amplitude of the high-frequency forcing. The possibility to use the phenomenon for low-level detection is experimentally demonstrated.