We have studied the statistical regimes of a random laser performing experiment and theoretical simulation. Both the theoretical simulations and experimental results agree showing the presence of three regions of fluctuations regime increasing the pumping energy in a weakly diffusive medium. An initial Gaussian regime is followed by a Lévy statistics and Gaussian statistic is recovered again for high pump pulse energy. This behavior is always present in condition of weakly diffusive medium, while the region of Levy statistics can disappear when the medium is strongly diffusive, presenting always a Gaussian regime with smooth emission spectrum.
Statistical regimes in random laser emission, / F. Tommasi; E. Ignesti; L. Fini; S. Lepri; S. Cavalieri. - STAMPA. - (2013), pp. 39-39. (Intervento presentato al convegno XCIX Congresso Nazionale Società Italiana di Fisica).
Statistical regimes in random laser emission,
TOMMASI, FEDERICO;IGNESTI, EMILIO;FINI, LORENZO;LEPRI, STEFANO;CAVALIERI, STEFANO
2013
Abstract
We have studied the statistical regimes of a random laser performing experiment and theoretical simulation. Both the theoretical simulations and experimental results agree showing the presence of three regions of fluctuations regime increasing the pumping energy in a weakly diffusive medium. An initial Gaussian regime is followed by a Lévy statistics and Gaussian statistic is recovered again for high pump pulse energy. This behavior is always present in condition of weakly diffusive medium, while the region of Levy statistics can disappear when the medium is strongly diffusive, presenting always a Gaussian regime with smooth emission spectrum.
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
