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Proceedings Paper

Excitation of a two-mode limit cycle dynamics on the route to polarization switching in a VCSEL subject orthogonal to optical injection
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Paper Abstract

We experimentally and numerically report on polarization switching (PS) mechanism which involves a two-mode limit cycle dynamics in a vertical-cavity surface-emitting laser (VCSEL) subject to orthogonal optical injection from a master laser (ML). The VCSEL (slave laser, SL) emits a horizontal linearly polarized (LP) fundamental mode, without optical injection. The VCSEL is injected by a vertically polarized light from ML. Dynamical characteristics of the VCSEL are investigated as a function of optical injection parameters, i.e., injection strength and frequency detuning between master and slave lasers. We experimentally resolve an injection parameter region for which, as the injection strength is increased for fixed detunings, a limit cycle dynamics in both non-injected and injected modes is abruptly excited. For larger injection strengths, the VCSEL switches from the two-mode to a single-mode limit cycle dynamics which involves only the injected mode. Using continuation methods, we numerically identify two torus bifurcation mechanisms, namely TR1 and TR2, which support such a switching scenario. We show that both TR1 and TR2 originate from a particular Hopf bifurcation which plays a key role in the polarization dynamics of the injected VCSEL. Furthermore, our results reveal that the newly observed switching dynamics are generic features of VCSEL two-mode systems.

Paper Details

Date Published: 19 May 2008
PDF: 10 pages
Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 699713 (19 May 2008); doi: 10.1117/12.781445
Show Author Affiliations
I. Gatare, Supélec, LMOPS-CNRS (France)
Vrije Univ. Brussel (Belgium)
M. Sciamanna, Supélec, LMOPS-CNRS (France)
M. Nizette, Univ. Libre de Bruxelles (Belgium)
H. Thienpont, Vrije Univ. Brussel (Belgium)
K. Panajotov, Vrije Univ. Brussel (Belgium)

Published in SPIE Proceedings Vol. 6997:
Semiconductor Lasers and Laser Dynamics III
Krassimir P. Panajotov; Marc Sciamanna; Angel A. Valle; Rainer Michalzik, Editor(s)

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