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Proceedings Paper

Supermodes of phase-coupled VCSEL arrays: experiments and theory
Author(s): Pierluigi Debernardi; Gian Paolo Bava; Fabrice Monti di Sopra
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Paper Abstract

We present a detailed study of oxide-confined, vertical-cavity surface-emitting lasers (VCSELs), where the reflectivity of the top mirror has been patterned by means of a metal grid, which at the same time acts also as an electrode. Owing to their features, these kind of devices are commonly referred to as phase-coupled VCSEL arrays. The anlaysis is based on a joint experimental and theoretical effort: the former is devoted to a complete characterization of the emission properites, while the latter is based on a comprehensive fully vectorial model for the structure eigenmodes with the details of their complex structure. The detected characteristics make them quite attractive for various applications and the comparison of their modal properties with the model is proven to be essential for a deep understanding of these lasers. In particular we explain for the first time, a characteristic behavior of the lasing array, which displays spatially inhomogeneous polarization characteristics with symmetry properties with respect to the array diagonals. The good matching between theory and experiment opens new perspectives for optimized devices.

Paper Details

Date Published: 15 April 2003
PDF: 12 pages
Proc. SPIE 4942, VCSELs and Optical Interconnects, (15 April 2003); doi: 10.1117/12.468389
Show Author Affiliations
Pierluigi Debernardi, Politecnico di Torino (Italy)
INFM (Italy)
Gian Paolo Bava, Politecnico di Torino (Italy)
INFM (Italy)
Fabrice Monti di Sopra, Avalon Photonics Ltd. (Switzerland)

Published in SPIE Proceedings Vol. 4942:
VCSELs and Optical Interconnects
Hugo Thienpont; Jan Danckaert, Editor(s)

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