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Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Self-localized structures in vertical-cavity surface-emitting lasers with external feedback

Paulau, P.V. and Gomila, D. and Ackemann, T. and Loiko, N.A. and Firth, W.J. (2008) Self-localized structures in vertical-cavity surface-emitting lasers with external feedback. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 78 (1). 016212-016212. ISSN 1063-651X

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Abstract

In this paper, we analyze a model of broad area vertical-cavity surface-emitting lasers subjected to frequency-selective optical feedback. In particular, we analyze the spatio-temporal regimes arising above threshold and the existence and dynamical properties of cavity solitons. We build the bifurcation diagram of stationary self-localized states, finding that branches of cavity solitons emerge from the degenerate Hopf bifurcations marking the homogeneous solutions with maximal and minimal gain. These branches collide in a saddle-node bifurcation, defining a maximum pump current for soliton existence that lies below the threshold of the laser without feedback. The properties of these cavity solitons are in good agreement with those observed in recent experiments.