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Optics Letters

Optics Letters


  • Vol. 26, Iss. 2 — Jan. 15, 2001
  • pp: 69–71

Experimental observation of noise precursors for virtual Hopf phenomena near period-doubling bifurcations in modulated diode lasers

H. Lamela, S. Pérez, and G. Carpintero  »View Author Affiliations

Optics Letters, Vol. 26, Issue 2, pp. 69-71 (2001)

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We present an experimental analysis of the effect of a rf amplitude modulation of the injection current in a distributed-feedback diode laser at 1.55 μm near the first period-doubling bifurcation. First experimental results of a virtual Hopf phenomenon were observed when two moving bumps with Lorentzian shapes appeared in the spectrum before the onset of the first period-doubling bifurcation occurred. We characterized this observation by increasing the amplitude of the current modulation of the diode laser until period-doubling bifurcation took place. The shape and position in the spectrum of these Lorentzian bumps were studied by the noise precursors theory, which predicts that the presence of noise will act as a virtual Hopf precursor in systems undergoing a period-doubling bifurcation.

© 2001 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(190.3100) Nonlinear optics : Instabilities and chaos
(270.2500) Quantum optics : Fluctuations, relaxations, and noise

H. Lamela, S. Pérez, and G. Carpintero, "Experimental observation of noise precursors for virtual Hopf phenomena near period-doubling bifurcations in modulated diode lasers," Opt. Lett. 26, 69-71 (2001)

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