Statistical regimes of random laser fluctuations

Year: 2007

Authors: Lepri S., Cavalieri S., Oppo GL., Wiersma D.

Autors Affiliation: Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy; Dipartimento di Fisica, Università di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino, Italy; European Laboratory for Non-linear Spectroscopy, via N. Carrara 1, I-50019 Sesto Fiorentino, Italy; SUPA, Department of Physics, University of Strathclyde, 107 Rottenrow, Glasgow, G4 0NG, United Kingdom; BEC-INFM Center, Trento, I-38050 Povo, Italy

Abstract: Statistical fluctuations of the light emitted from amplifying random media are studied theoretically and numerically. The characteristic scales of the diffusive motion of light lead to Gaussian or power-law (Levy) distributed fluctuations depending on external control parameters. In the Levy regime, the output pulse is highly irregular leading to huge deviations from a mean-field description. Monte Carlo simulations of a simplified model which includes the population of the medium demonstrate the two statistical regimes and provide a comparison with dynamical rate equations. Different statistics of the fluctuations helps to explain recent experimental observations reported in the literature.

Journal/Review: PHYSICAL REVIEW A

Volume: 75 (6)      Pages from: 063820-1  to: 063820-7

KeyWords: Computer simulation; Diffusion; Gaussian distribution; Mathematical models; Monte Carlo methods, Amplifying random media; Control parameters; External control; Power-law distributed; Rate equations; Light emission
DOI: 10.1103/PhysRevA.75.063820

Citations: 94
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