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Proceedings Paper

Optical feedback induces polarization mode-hopping in vertical-cavity surface-emitting lasers
Author(s): Marc Sciamanna; Krassimir P. Panajotov; Patrice Megret; Hugo Thienpont; Michel Blondel; Irina P. Veretennicoff
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Paper Abstract

We report on new dynamics in vertical-cavity surface-emitting lasers (VCSELs), which is induced by a polarization preserving optical feedback. Our solitary VCSEL, i.e. without feedback, emits in a single linearly polarized (LP) and fundamental transverse mode. Optical feedback induces multiple polarization switchings in the L-I curve. When the injection current is set close to one of the multiple polarization switching points, the laser system exhibits a random anticorrelated hopping of the two orthogonal LP fundamental modes. Of particular interest is the observation of antiphase oscillations in the two LP modes that occur with a period corresponding to the delay time, and which complement the slow mode-hopping. Moreover, the LP-resolved optical spectra show random frequency hops between ECMs. The laser system is therefore not only bistable between the LP modes, but also multistable between ECMs. A theoretical rate equation approach yields a good qualitative agreement with our experiment. We report similar delay-periodic oscillations complementing a mode hopping in a scalar delay differential equation modeling the motion of a particle in a double well potential. Such a model was recently investigated by Tsimring and Pikovsky, in a very general context. Our results in VCSELs yield the first experimental evidence of delay-periodic oscillations in a bistable physical system with noise, and are therefore thought to be of general interest for many other processes in biology, medicine, etc. that exhibit interaction of noise, delay and bistability.

Paper Details

Date Published: 15 April 2003
PDF: 9 pages
Proc. SPIE 4942, VCSELs and Optical Interconnects, (15 April 2003); doi: 10.1117/12.470759
Show Author Affiliations
Marc Sciamanna, Faculte Polytechnique de Mons (Belgium)
Krassimir P. Panajotov, Vrije Univ. Brussel (Belgium)
Institute of Solid State Physics (Bulgaria)
Patrice Megret, Faculte Polytechnique de Mons (Belgium)
Hugo Thienpont, Vrije Univ. Brussel (Belgium)
Michel Blondel, Faculte Polytechnique de Mons (Belgium)
Irina P. Veretennicoff, Vrije Univ. Brussel (Belgium)

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

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