Inhomogeneous quantum dot gain medium for improved spatial coherence in wide-aperture semiconductor lasers

Jayanta Mukherjee; John G. McInerney

doi:10.1117/12.840661

25 February 2010 Inhomogeneous quantum dot gain medium for improved spatial coherence in wide-aperture semiconductor lasers

Jayanta Mukherjee, John G. McInerney

Author Affiliations +

Proceedings Volume 7597, Physics and Simulation of Optoelectronic Devices XVIII; 759717 (2010) https://doi.org/10.1117/12.840661
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

To analyze the problem of modal filamentation and beam-instabilities in wide-aperture semiconductor lasers, we have developed a sophisticated opto-electro-thermal model based on Maxwell-Bloch formalism, to describe frequency-, carrier- and temperature-dependent gain and dispersion. Effects of both homogeneous and inhomogeneous gain broadening are analyzed. It is shown, via linear stability analysis and high resolution space-time adaptive FEM simulations that inhomogeneous gain broadening in quantum dot (QD) lasers enhances spatial coherence and leads to suppressed filamentation and stable far-fields in both thermal and non-thermal regimes even when the phase-amplitude coupling is comparable to that in quantum well (QW) gain medium.

Citation Download Citation

Jayanta Mukherjee and John G. McInerney "Inhomogeneous quantum dot gain medium for improved spatial coherence in wide-aperture semiconductor lasers", Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 759717 (25 February 2010); https://doi.org/10.1117/12.840661

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