Stochastic resonance in bulk semiconductor lasers
Anno: 2005
Autori: Pedaci F., Giudici M., Tredicce JR., Giacomelli G.
Affiliazione autori: Institut Non-linéaire de Nice, UMR 6618 Centre National de la Recherche Scientifique, Université de Nice Sophia-Antipolis, 06560 Valbonne, France;
Istituto Nazionale Ottica Applicata, Largo E. Fermi 6, 50143 Firenze (Italy) and INFM, UdR Firenze, Firenze, Italy
Abstract: The stochastic time scale of the mode hopping in a bulk semiconductor laser can be varied maintaining the symmetry of the residence times by a proper tuning of the laser substrate temperature and pumping current. While the addition of external noise to the pumping current affects the symmetry of the mode-hopping process, a sinusoidal modulation does not, providing that the modulation amplitude is below a critical value. In this case, we observe stochastic resonance in the modal intensities of the laser. We show the occurrence of the phenomenon in the spectral domain, and we characterize it by a statistical analysis based on the residence times probability distributions. The evidence of bona fide resonance is also provided, varying the modulation frequency and analyzing a proper statistical indicator. Changing the temperature of the laser substrate we show that resonance occurs at different modulation periods always equal to the double of the average residence time measured without modulation.
Giornale/Rivista: PHYSICAL REVIEW E
Volume: 71 (3) Da Pagina: 036125-1 A: 036125-8
Parole chiavi: BONA-FIDE RESONANCE; FLUCTUATIONS; PARTITIONDOI: 10.1103/PhysRevE.71.036125Citazioni: 6dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui