Soft turbulence in multimode lasers

Year: 1997

Authors: Casini D., D’Alessandro G., Politi A.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Department of Mtahematics, University of Southampton SO17 1BJ, England, UK;
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy

Abstract: Using a weakly nonlinear analysis, we study the behavior of a homogeneously broadened laser in the vicinity of the second threshold. We show that the dynamics is described by a complex Ginzburg-Landau equation coupled to a Fokker-Plank equation. Although the cubic term of the Ginzburg-Landau equation is destabilizing for all parameter values, bounded solutions exist because of the strong nonlinear dispersion (’’dispersive chaos’’). A careful numerical study of the original Maxwell-Bloch equations is also carried out to investigate the role played by off-resonant solutions.

Journal/Review: PHYSICAL REVIEW A

Volume: 55 (1)      Pages from: 751  to: 760

KeyWords: Broadened Ring Laser; Instabilities
DOI: 10.1103/PhysRevA.55.751

Citations: 10
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