Numerical study of noise-induced transitions in nonlinear dynamics of optically injected semiconductor lasers

: This study numerically investigates two different noise-induced transitions of nonlinear dynamics in optically injected semiconductor lasers based on the Lang-Kobayashi laser model. Spontaneous emission noise is observed to induce dynamical transitions from stable injection locking to period-one dynamics and from period-one to period-two dynamics when operating points are close to the corresponding dynamical boundaries, respectively. Such transitions follow a smooth dynamical evolution as the noise level increases. The resulting noise-induced dynamical states exhibit features highly similar to their adjacent dynamical states that keep the same dynamical behaviors when subject to noise. Regions where the noise-induced dynamical transitions occur are identified.