Statistical regimes of random laser fluctuations

Stefano Lepri, Stefano Cavalieri, Gian-Luca Oppo, Diederik S. Wiersma

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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 (Lévy) distributed fluctuations depending on external control parameters. In the Lévy 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.
Original languageEnglish
Article number063820
Number of pages7
JournalPhysical Review A
Issue number6
Publication statusPublished - 21 Jun 2007


  • optics
  • physics
  • statistics
  • Levy regime
  • laser
  • beams
  • laser fluctuations
  • light

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