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Intensity correlation functions of dye lasers: Comparison of colored-gain-noise and colored-loss-noise models
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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.
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NORIEGA, J. m., PESQUERA, L., RODRÍGUEZ DÍAZ, Miguel ángel, CASADEMUNT I VIADER, Jaume, HERNÁNDEZ MACHADO, Aurora. Intensity correlation functions of dye lasers: Comparison of colored-gain-noise and colored-loss-noise models. _Physical Review A_. 1991. Vol. 44, núm. 3, pàgs. 2094-2101. [consulta: 23 de gener de 2026]. ISSN: 1050-2947. [Disponible a: https://hdl.handle.net/2445/9363]