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Proceedings Paper

Spectral behavior of long wavelength VCSELs
Author(s): Alexandre Bacou; Angélique Rissons; Jean-Claude Mollier
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Paper Abstract

For a long time, only a small wavelength range of Vertical-Cavity Surface-Emitting Lasers (VCSEL) was available. The current evolution in process technology allows the fabrication of long wavelength VCSEL that is interesting for Telecom systems because they offer a higher integration level than the existing optical sources at lower costs since they are fabricated in arrays. We propose to focus our investigation on the behavior of singlemode 1.55μm VCSEL. We aim at precisely knowing their spectral properties under direct modulation. We present a study about the linewidth measurement and the linewidth enhancement factor, also called the Henry - or the alpha - factor. Many studies have been reported but only a few of them are really efficient. Two different set-ups are presented here to extract alpha factor. The first one uses an interferometer based on the heterodyne technique and the second uses the dispersive properties of an optical fiber. We compare both results and discuss about each set-up.

Paper Details

Date Published: 29 January 2008
PDF: 8 pages
Proc. SPIE 6908, Vertical-Cavity Surface-Emitting Lasers XII, 69080F (29 January 2008); doi: 10.1117/12.763054
Show Author Affiliations
Alexandre Bacou, Univ. de Toulouse (France)
Angélique Rissons, Univ. de Toulouse (France)
Jean-Claude Mollier, Univ. de Toulouse (France)

Published in SPIE Proceedings Vol. 6908:
Vertical-Cavity Surface-Emitting Lasers XII
Chun Lei; James K. Guenter, Editor(s)

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