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Open Access item Asymmetric and delayed activation of side-modes in multimode semiconductor lasers with optical feedback

Authors:Buldú, Javier M.
Rogister, Fabien
Trull, J.
Serrat, Carles
Torrent, M. C.
García-Ojalvo, Jordi
Mirasso, Claudio R.
Keywords:Semiconductor laser dynamics, Low-frequency fluctuations, Multimode lasers, Optical feedback, Lang–Kobayashi equations
Issue Date:Dec-2002
Publisher:Institute of Physics Publishing
Citation:Journal of Optics B: Quantum and Semiclassical Optics 4(6): 415-420 (2002)
Abstract:We study the multimode dynamics of a semiconductor laser with optical feedback operating in the low-frequency fluctuation regime. A multimode extension of the Lang–Kobayashi (LK) model shows, in agreement with experimental observations, that the low-frequency power dropouts exhibited by the main modes are accompanied by sudden, asymmetric, activations of dormant longitudinal side modes. Furthermore, these activations are delayed with respect to the dropouts of the active modes. In order to satisfactorily reproduce both the asymmetric activation of side modes and their delay with respect to the dropouts, the generalized LK model has to include a parabolic gain profile, together with a frequency shift of the gain curve with carrier population.
Description:6 pages, 4 figures.
Publisher version (URL):http://dx.doi.org/10.1088/1464-4266/4/6/308
Appears in Collections:(IFISC) Artículos

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