Phys. Rev. A 56, 2237–2241 (1997)Pattern dynamics in a large Fresnel number laser close to thresholdReceived 16 December 1996; published in the issue dated September 1997 A high Fresnel number laser close to threshold can be set at a detuning value where it displays only the first transverse pattern with zero intensity in its center. However, the availability of a large phase space gives rise to a new type of dynamics. Precisely, for this highly symmetric situation, the intensity pattern undergoes a transition between stable and oscillating superpositions of traveling and standing waves. Such a transition corresponds to the so-called Takens-Bogdanov bifurcation. We report experimental evidence of such a behavior. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.56.2237
DOI:
10.1103/PhysRevA.56.2237
PACS:
42.65.Sf, 42.55.-f, 47.20.Ky
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