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Proceedings Paper

Dynamics of power distribution in multimode semiconductor lasers with optical feedback
Author(s): Javier M. Buldu; Fabien Rogister; J. Trull; Carles Serrat; M. Carme Torrent-Serra; Claudio R. Mirasso; Jordi Garcia-Ojalvo
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Paper Abstract

Semiconductor lasers with optical feedback are prone to exhibit unstable behavior. When working near threshold with moderate to low optical feedback, intensity dropouts are observed. These intensity drops, also called low-frequency fluctuations, occur both in single-mode and multimode semiconductor lasers. In this paper, the dynamics of the power distribution between the longitudinal modes of a multimode semiconductor laser is experimentally and numerically analyzed in the low-frequency fluctuation regime. It is observed that power dropouts of the total intensity, corresponding to drops in the dominant modes of the laser, are invariably accompanied by sudden activations of several longitudinal side modes. These activations are seen not to be simultaneous to the dropouts of the main modes, but to occur after them. The phenomenon is statistically analyzed in a systematic way, and the corresponding delay is estimated, leading to the conclusion that the side mode activation is a consequence of the dropouts of the dominant modes. A multimode extension of the Lang-Kobayashi equations is used to model the experimental setup. Numerical simulations also exhibit a time delay between the side-mode activation and the power dropout of the total intensity.

Paper Details

Date Published: 12 June 2002
PDF: 9 pages
Proc. SPIE 4646, Physics and Simulation of Optoelectronic Devices X, (12 June 2002); doi: 10.1117/12.470543
Show Author Affiliations
Javier M. Buldu, Univ. Politecnica de Catalunya (Spain)
Fabien Rogister, Faculte Polytechnique de Mons (Belgium)
J. Trull, Univ. Politecnica de Catalunya (Spain)
Carles Serrat, Univ. Politecnica de Catalunya (Spain)
M. Carme Torrent-Serra, Univ. Politecnica de Catalunya (Spain)
Claudio R. Mirasso, Univ. de les Illes Balears (Spain)
Jordi Garcia-Ojalvo, Univ. Politecnica de Catalunya (Spain)

Published in SPIE Proceedings Vol. 4646:
Physics and Simulation of Optoelectronic Devices X
Peter Blood; Marek Osinski; Yasuhiko Arakawa, Editor(s)

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