Chaotic pulsing and quasi-periodic route to chaos in asemiconductor laser with delayed opto-electronic feedback

摘要

Chaotic pulsing and the route to chaos in a semiconductor lasernwith delayed, positive opto-electronic feedback are investigatednnumerically and experimentally. Both numerical simulation andnexperimental observation indicate that the laser enters a chaoticnpulsing state at certain delay times of the feedback loop through anquasi-periodic route. The characteristics of each dynamical state arenanalyzed. The chaotic pulsing state is verified with a positive Lyapunovnexponent and a fractal correlation dimension. The experimental resultsnshow very good qualitative agreement with the numerical results.nQuantitative discrepancy between experimental and numerical results cannbe explained by the bandpass characteristics of the electronic feedbacknloop