Düsseldorf 2007 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 4: Nichtlineare optische Effekte und Lichtquellen I

Q 4.6: Vortrag

Montag, 19. März 2007, 11:45–12:00, 5J

Mode statistics in random lasers — •Oleg Zaitsev — Fachbereich Physik, Universität Duisburg-Essen, Lotharstr. 1, 47048 Duisburg

Representing an ensemble of random lasers with an ensemble of random matrices, I compute average number of lasing modes and its fluctuations. The regimes of weak and strong coupling of the passive resonator to environment are considered. In the latter case, contrary to an earlier claim in the literature, I do not find a power-law dependence of the average mode number on the pump strength. For the relative fluctuations, however, a power law can be established. It is shown that, due to the mode competition, the distribution of the number of excited modes over an ensemble of lasers is not binomial.

Bibliography: O. Zaitsev, Phys. Rev. A 74, 063803 (2006).