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Phys. Rev. Lett. 94, 088101 (2005) [4 pages]

Scaling Behavior of Laser Population Dynamics with Time-Delayed Coupling: Theory and Experiment

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Min-Young Kim1,2 *, Rajarshi Roy1,2,3, Joan L. Aron4, Thomas W. Carr5, and Ira B. Schwartz6
1Department of Physics, University of Maryland, College Park, Maryland 20742, USA
2Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, USA
3Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA
4Science Communication Studies, Columbia, Maryland 21045, USA
5Department of Mathematics, Southern Methodist University, Dallas, Texas 75275, USA
6Code 6792, Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375, USA

Received 23 August 2004; published 28 February 2005

We study the influence of asymmetric coupling strengths on the onset of light intensity oscillations in an experimental system consisting of two semiconductor lasers cross coupled optoelectronically with a time delay. We discover a scaling law that relates the amplitudes of oscillations and the coupling strengths. These observations are in agreement with a theoretical model. These results could be applicable to the population dynamics of other systems, such as the spread of disease in human populations coupled by migration.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.94.088101
DOI: 10.1103/PhysRevLett.94.088101
PACS: 87.23.Cc, 42.65.Sf, 89.75.Da

* Electronic address: mmyykim@glue.umd.edu

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