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Proceedings Paper

Different regimes of low-frequency fluctuations in vertical-cavity surface-emitting lasers
Author(s): Marc Sciamanna; Cristina Masoller; Neal Broadus Abraham; Fabien Rogister; Patrice Megret; Michel Blondel
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Paper Abstract

We show that vertical-cavity surface-emitting lasers (VCSEL) subject to a polarization preserving optical feedback from a long external cavity may exhibit two different types of low-frequency fluctuations (LFF) regime. In both types, the total intensity shows random drops and then recovers gradually to its original value. But the two LFF types are clearly distinguished by the behavior of the x- and y-linearly polarized (LP) modes. Type I LFF is characterized by the fact that the x- and y-LP modes compete with nearly equal power, while type II LFF is characterized by intensity dropouts in the dominant polarization mode and intensity bursts in the depressed mode. We analyze the parameter regions in which these different LFF occur and characterize them further. Our numerical results suggest that a transition from one LFF type to the other may be experimentally observed by modifying the frequency difference and/or the gain-to-loss ratio of the two LP modes. The LFF we present is an example of vectorial chaos, which may be of use for multichannel secure communication systems using chaotic light.

Paper Details

Date Published: 15 April 2003
PDF: 10 pages
Proc. SPIE 4942, VCSELs and Optical Interconnects, (15 April 2003); doi: 10.1117/12.470761
Show Author Affiliations
Marc Sciamanna, Faculte Polytechnique de Mons (Belgium)
Cristina Masoller, Univ. de la Republica (Uruguay)
Neal Broadus Abraham, DePauw Univ. (United States)
Fabien Rogister, Faculte Polytechnique de Mons (Belgium)
Patrice Megret, Faculte Polytechnique de Mons (Belgium)
Michel Blondel, Faculte Polytechnique de Mons (Belgium)

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

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