Regensburg 2010 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Nonlinear Dynamics II

DY 33.4: Talk

Friday, March 26, 2010, 11:30–11:45, H46

Diagrammatic semiclassical laser theory — •Oleg Zaitsev¹ and Lev Deych² — ¹Physikalisches Institut der Universität Bonn, Nußallee 12, 53115 Bonn, Germany — ²Physics Department, Queens College of City University of New York, Flushing, NY 11367, U.S.A.

We derive semiclassical laser equations valid in all orders of nonlinearity. With the help of a diagrammatic representation, the perturbation series in powers of electric field can be resummed in terms of a certain class of diagrams. The resummation makes it possible to take into account a weak effect of population-inversion pulsations in a controlled way, while treating the nonlinearity exactly. The proposed laser theory reproduces the all-order nonlinear equations in the approximation of constant population inversion and the third-order equations with population-pulsation terms, as special cases. The theory can be applied to arbitrarily open and irregular lasers, such as random lasers.