Title:
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Stabilization of broad area semiconductor lasers
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Author:
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Kumar, Shubham; Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
Abstract:
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Broad Area Semiconductor edge-emitting lasers typically display self-focusing nonlinearity due to the refractive index dependence on the population inversion. It induces the homogeneous solution instability, multi-transverse mode operation and filamentation. This behavior strongly deteriorates the beam quality and drastically reduces their applicability. We suppress this instability for semiconductors with small enough linewidth enhancement factors, ¿H, by the introduction of a single spatial modulation in the transverse and longitudinal directions. For large ¿H values, optimized multi-frequency spatial modulations are needed. The proposed scheme becomes especially interesting for high nonlinearities that correspond to the normal laser operation. |
Subject(s):
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-Àrees temàtiques de la UPC::Física -Semiconductor laser -Broad area semiconductor lasers -Laser beam stabilization -Làsers de semiconductors |
Rights:
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Document type:
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Article - Published version Conference Object |
Published by:
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International Society for Photo-Optical Instrumentation Engineers (SPIE)
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