Amplitude and phase reconstruction of a doughnut pattern in a CO2 laser

C. Lepers; Veronique Zehnle; Daniel Hennequin; Didier Dangoisse; Pierre A. Glorieux; A. Barsella; Ennio Arimondo

doi:10.1117/12.239178

29 April 1996 Amplitude and phase reconstruction of a doughnut pattern in a CO₂ laser

C. Lepers, Veronique Zehnle, Daniel Hennequin, Didier Dangoisse, Pierre A. Glorieux, A. Barsella, Ennio Arimondo

Proceedings Volume 2792, Laser Optics '95: Nonlinear Dynamics in Lasers; (1996) https://doi.org/10.1117/12.239178
Event: Laser Optics '95, 1995, St. Petersburg, Russian Federation

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.

Citation Download Citation

C. Lepers, Veronique Zehnle, Daniel Hennequin, Didier Dangoisse, Pierre A. Glorieux, A. Barsella, and Ennio Arimondo "Amplitude and phase reconstruction of a doughnut pattern in a CO₂ laser", Proc. SPIE 2792, Laser Optics '95: Nonlinear Dynamics in Lasers, (29 April 1996); https://doi.org/10.1117/12.239178

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