Asymmetric square-waves in mutually coupled semiconductor lasers

David W. Sukow; Athanasios Gavrielides; Thomas Erneux; Josiah W. Davis; Makhosazana Z. Dube; Saneliso Mabuza; Russell Trimmer

doi:10.1117/12.781473

8 May 2008 Asymmetric square-waves in mutually coupled semiconductor lasers

David W. Sukow, Athanasios Gavrielides, Thomas Erneux, Josiah W. Davis, Makhosazana Z. Dube, Saneliso Mabuza, Russell Trimmer

Author Affiliations +

Proceedings Volume 6997, Semiconductor Lasers and Laser Dynamics III; 69970P (2008) https://doi.org/10.1117/12.781473
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

Two edge-emitting lasers coupled through polarization-rotated optical injection exhibit square-wave oscillations provided the roundtrip time from laser to laser and back is sufficiently large. If the mutual coupling between the lasers is relatively weak, the two plateaus of the square-waves exhibit different durations even though the total period remains close to the roundtrip time. This asymmetry progressively disappears as the feedback strength is increased. The experimental observations are confirmed by numerical simulations. The simulations also reveal that the square-wave regimes appear through a series of complex bifurcations and that a sufficiently large roundtrip time is needed.

Citation Download Citation

David W. Sukow, Athanasios Gavrielides, Thomas Erneux, Josiah W. Davis, Makhosazana Z. Dube, Saneliso Mabuza, and Russell Trimmer "Asymmetric square-waves in mutually coupled semiconductor lasers", Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 69970P (8 May 2008); https://doi.org/10.1117/12.781473

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KEYWORDS

Polarization

Semiconductor lasers

Neodymium

Polarizers

Amplifiers

Laser systems engineering

Mathematical modeling

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