Scientific Results

Chaotic spiking and incomplete homoclinic scenarios in semiconductor lasers with optoelectronic feedback

Year: 2009

Authors: Al-Naimee K., Marino F., Ciszak M., Meucci R., Arecchi F. T.

Autors Affiliation: CNR-Istituto Nazionale di Ottica Applicata, Largo E Fermi 6, 50125 Firenze, Italy; Physics Department, College of Science, University of Baghdad, Baghdad, Iraq; Dipartimento di Fisica, Università di Firenze, INFN, Sezione di Firenze,
Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy

Abstract: We demonstrate experimentally and theoretically the existence of slow chaotic spiking sequences in the dynamics of a semiconductor laser with ac-coupled optoelectronic feedback. The timescale of these dynamics is fully determined by the high-pass filter in the feedback loop and their erratic, though deterministic, nature is evidenced by means of the interspike interval (ISI) probability distribution. We eventually show that this regime is the result of an incomplete homoclinic scenario to a saddle-focus, where an exact homoclinic connection does not occur.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 11      Pages from: 073022-1  to: 073022-11

KeyWords: Feed-back loop; Homoclinic; Homoclinic connection; Inter-spike interval; Optoelectronic feedback; Saddle-focus; Time-scale, Chaos theory; High pass filters; Lasers; Probability distributions, Semiconductor lasers
DOI: 10.1088/1367-2630/11/7/073022

Citations: 27
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