Bifurcations of hexagonal patterns stabilized and selected with spatial perturbations in a wide-aperture laser
Anno: 1998
Autori: Meucci R., Labate A., Ciofini M., Wang PY.
Affiliazione autori: Istituto Nazionale di Ottica, Largo E Fermi 6, 50125 Florence, Italy; Laboratory of Optical Physics, Institute of Physics, Center for Condensed Matter Physics, PO Box 603, Beijing 100080, China
Abstract: Starting from a simple hexagonal pattern stabilized and selected with the spatial perturbation method in a wide-aperture CO(2) laser, we observed the transition to a dodecagonal pattern via the doubling of the azimuthal spatial frequency by changing the cavity detuning. Further increasing the detuning induces more complicated patterns. such as double hexagons. The symmetry-breaking effect on the stabilized and selected patterns, introduced by a slight misalignment of a laser mirror, is observed. We also find that the complicated temporal instabilities of the unperturbed patterns are eliminated by the spatial perturbations. Numerical simulations, based on the Fox and Li theory for the held propagation inside the cavity, are able to reproduce the patterns with the simplest symmetry.
Giornale/Rivista: QUANTUM AND SEMICLASSICAL OPTICS
Volume: 10 (6) Da Pagina: 803 A: 808
Parole chiavi: Bifurcation (mathematics); Computer simulation; Laser tuning; Mirrors; Nonlinear optics; Perturbation techniques, Cavity detuning; Laser mirror; Symmetry breaking effect; Wide aperture laser, Carbon dioxide lasersDOI: 10.1088/1355-5111/10/6/012Citazioni: 12dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui