Effect of external noise correlation in optical coherence resonance -: art. no. 051109

Coherence resonance occurring in semiconductor lasers with optical feedback is studied via the Lang-Kobayashi model with external nonwhite noise in the Pumping current. The temporal correlation and the amplitude of the noise have a highly relevant influence in the system, leading, to an optimal coherent response for suitable values of both the noise amplitude and correlation time. This phenomenon is quantitatively characterized by means of several statistical measures.