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Intensity correlation functions of dye lasers: Comparison of colored-gain-noise and colored-loss-noise models
Noriega, J. M.; Pesquera, L.; Rodríguez Díaz, Miguel Ángel; Casademunt i Viader, Jaume; Hernández Machado, Aurora
Universitat de Barcelona
The intensity correlation functions C(t) for the colored-gain-noise model of dye lasers are analyzed and compared with those for the loss-noise model. For correlation times ¿ larger than the deterministic relaxation time td, we show with the use of the adiabatic approximation that C(t) values coincide for both models. For small correlation times we use a method that provides explicit expressions of non-Markovian correlation functions, approximating simultaneously short- and long-time behaviors. Comparison with numerical simulations shows excellent results simultaneously for short- and long-time regimes. It is found that, when the correlation time of the noise increases, differences between the gain- and loss-noise models tend to disappear. The decay of C(t) for both models can be described by a time scale that approaches the deterministic relaxation time. However, in contrast with the loss-noise model, a secondary time scale remains for large times for the gain-noise model, which could allow one to distinguish between both models.
2010-05-04
Làsers
Fluctuacions (Física)
Processos estocàstics
Lasers
Fluctuations (Physics)
(c) The American Physical Society, 1991
Article
The American Physical Society
         

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