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Proceedings Paper

Amplitude and phase reconstruction of a doughnut pattern in a CO2 laser
Author(s): C. Lepers; Veronique Zehnle; Daniel Hennequin; Didier Dangoisse; Pierre A. Glorieux; A. Barsella; Ennio Arimondo
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Paper Abstract

In this paper, we present an original detection method using three fast detectors to monitor the spatio-temporal dynamics of a bimode CO2 laser with saturable absorber. We observe that the time dependent components of the modal amplitudes increase as the frequency degeneracy lift between the TEM01 and TEM10 modes is reduced. Just before locking the system undergoes a period-doubling cascade leading to chaos. We record the temporal evolution of the modal amplitudes and the optical phase difference between the two modes in the specific regimes within the period-doubling cascade. Numerical simulations are in good agreement with the experiments, in particular they confirm the existence of the period-doubling cascade.

Paper Details

Date Published: 29 April 1996
PDF: 8 pages
Proc. SPIE 2792, Laser Optics '95: Nonlinear Dynamics in Lasers, (29 April 1996); doi: 10.1117/12.239178
Show Author Affiliations
C. Lepers, Univ. de Lille I (France)
Veronique Zehnle, Univ. de Lille I (France)
Daniel Hennequin, Univ. de Lille I (France)
Didier Dangoisse, Univ. de Lille I (France)
Pierre A. Glorieux, Univ. de Lille I (France)
A. Barsella, Univ. di Pisa (Italy)
Ennio Arimondo, Univ. di Pisa (Italy)

Published in SPIE Proceedings Vol. 2792:
Laser Optics '95: Nonlinear Dynamics in Lasers
Neal Broadus Abraham; Yakov I. Khanin, Editor(s)

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