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Proceedings Paper

Square-wave oscillations in edge-emitting diode lasers with polarization-rotated optical feedback
Author(s): A. Gavrielides; T. Erneux; D. W. Sukow; G. Burner; T. McLachlan; J. Miller; J. Amonette
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Paper Abstract

The square-wave response of edge-emitting diode lasers subject to a delayed polarization-rotated optical feedback is studied experimentally and theoretically. Square-wave self-modulated polarization intensities of a period close to twice the delay τ of the feedback gradually appear through a sequence of bifurcations starting with a Hopf bifurcation (Gavrielides et al, Proc. SPIE 6115, to appear, 2006). In Gavrielides et al (submitted, 2006), squarewave solutions were determined analytically from the laser equations in the limit of large τ. A condition on the laser parameters was derived explaining why square-wave oscillations are preferentially observed for suffciently large feedback strength. In this paper, we concentrate on the relaxation oscillations that always appear at each intensity jump between the plateaus of the square-wave. We show analytically that if the feedback strength is progressively decreased, a bifurcation to sustained relaxation oscillations is possible for one of the two plateaus.

Paper Details

Date Published: 15 April 2006
PDF: 7 pages
Proc. SPIE 6184, Semiconductor Lasers and Laser Dynamics II, 61840T (15 April 2006); doi: 10.1117/12.662773
Show Author Affiliations
A. Gavrielides, Air Force Research Lab. (United States)
T. Erneux, Univ. Libre de Bruxelles (Belgium)
D. W. Sukow, Washington and Lee Univ. (United States)
G. Burner, Washington and Lee Univ. (United States)
T. McLachlan, Washington and Lee Univ. (United States)
J. Miller, Washington and Lee Univ. (United States)
J. Amonette, Washington and Lee Univ. (United States)

Published in SPIE Proceedings Vol. 6184:
Semiconductor Lasers and Laser Dynamics II
Daan Lenstra; Markus Pessa; Ian H. White, Editor(s)

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