Experimental Study of Noise-induced Phase Synchronization in Vertical-cavity Lasers

TL;DR

This paper presents experimental evidence that adding optimal white noise to a vertical-cavity laser can induce phase synchronization with periodic input, supported by numerical simulations.

Contribution

It provides the first experimental demonstration of noise-induced phase synchronization in vertical-cavity lasers, validated through numerical Langevin model comparisons.

Findings

Noise induces phase synchronization at optimal noise levels.

Synchronization is robust across different waveforms under certain amplitude conditions.

Experimental results align with Langevin model simulations.

Abstract

We report the experimental evidence of noise-induced phase synchronization in a vertical cavity laser. The polarized laser emission is entrained with the input periodic pump modulation when an optimal amount of white, gaussian noise is applied. We characterize the phenomenon, evaluating the average frequency of the output signal and the diffusion coefficient of the phase difference variable. Their values are roughly independent on different waveforms of periodic input, provided that a simple condition for the amplitudes is satisfied. The experimental results are compared with numerical simulations of a Langevin model.