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• W1536791821 abstract "We show that the long-established concept of a linewidth-enhancement factor $ensuremath{alpha}$ to describe carrier-induced refractive index changes in semiconductor lasers breaks down in quantum-dot (QD) lasers when describing complex dynamic scenarios, found, for example, under high-excitation or optical injection. By comparing laser simulations using a constant $ensuremath{alpha}$ factor with results from a more complex nonequilibrium model that separately treats gain and refractive index dynamics, we examine the conditions under which an approximation of the amplitude-phase coupling by an $ensuremath{alpha}$ factor becomes invalid. The investigations show that while a quasiequilibrium approach for conventional quantum well lasers is valid over a reasonable parameter range, allowing one to introduce an $ensuremath{alpha}$ factor as a constant parameter, the concept is in general not applicable to predict QD laser dynamics due to the different time scales of the involved scattering processes." @default.
• W1536791821 created "2016-06-24" @default.
• W1536791821 creator A5012282324 @default.
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• W1536791821 date "2012-12-26" @default.
• W1536791821 modified "2023-10-17" @default.
• W1536791821 title "Failure of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>α</mml:mi></mml:math>factor in describing dynamical instabilities and chaos in quantum-dot lasers" @default.
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• W1536791821 doi "https://doi.org/10.1103/physreve.86.065201" @default.
• W1536791821 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23367994" @default.
• W1536791821 hasPublicationYear "2012" @default.
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