PMID: 11909288Mar 23, 2002Paper

Polarization patterns and vectorial defects in type-II optical parametric oscillators

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
M SantagiustinaG L Oppo

Abstract

Previous studies of lasers and nonlinear resonators have revealed that the polarization degree of freedom allows for the formation of polarization patterns and novel localized structures, such as vectorial defects. Type- II optical parametric oscillators are characterized by the fact that the down-converted beams are emitted in orthogonal polarizations. In this paper we show the results of the study of pattern and defect formation and dynamics in a type-II degenerate optical parametric oscillator, for which the pump field is not resonated in the cavity. We find that traveling waves are the predominant solutions and that the defects are vectorial dislocations that appear at the boundaries of the regions where traveling waves of different phase or wave-vector orientation are formed. A dislocation is defined by two topological charges, one associated with the phase and another with the wave-vector orientation. We also show how to stabilize a single defect in a realistic experimental situation. The effects of phase mismatch of nonlinear interaction are finally considered.

References

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Citations

Feb 3, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Miguel Hoyuelos, Matías dell'Erba
Oct 10, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Carlos Martel, Miguel Hoyuelos
Oct 4, 2003·Physical Review Letters·R NeubeckerG-L Oppo
Oct 9, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Gonzalo IzúsDaniel Walgraef
Dec 21, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Lendert Gelens, Edgar Knobloch
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Gonzalo IzúsMarco Santagiustina

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