Scientific Results

Stabilization of unstable fixed points in the dynamics of a laser with feedback

Year: 1999

Authors: Ciofini M., Labate A., Meucci R., Galanti M.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Dipartimento di Sistemi e Informatica, University of Florence, Via Santa Marta 3, 50139 Florence, Italy

Abstract: We report theoretical and experimental results on the stabilization of unstable steady states in a CO2 laser with feedback. Periodic and chaotic oscillations have been suppressed by means of a control loop consisting-of a high-pass filter, known as washout filter. Although the filter characteristics are determined on the basis of linear analysis, taking into account the problem of robustness with respect to parameter changes; the present control strategy provides a large attractive domain in the phase space.

Journal/Review: PHYSICAL REVIEW E

Volume: 60 (1)      Pages from: 398  to: 402

KeyWords: Chaos theory; Degrees of freedom (mechanics); Electrooptical devices; Feedback; High pass filters; Laser pulses; Light modulators; Mathematical models; Phase space methods; System stability, Washout filters, Carbon dioxide lasers
DOI: 10.1103/PhysRevE.60.398

Citations: 34
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