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Title

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

AuthorsSantagiustina, Marco; Hernández-García, Emilio ; San Miguel, Maxi ; Scroggie, Andrew J.; Oppo, Gian-Luca
Keywords[PACS] Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics
Issue Date13-Feb-2003
PublisherAmerican Physical Society
CitationPhysical Review E 65(3): 036610 (2002)
AbstractPrevious 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.
Description14 pages, 15 figures, 2 appendices.-- PACS nr.: 42.65.Sf.-- ArXiv pre-print available at: http://arxiv.org/abs/physics/0111023
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevE.65.036610
URIhttp://hdl.handle.net/10261/14844
DOI10.1103/PhysRevE.65.036610
ISSN1539-3755
Appears in Collections:(IFISC) Artículos
(IMEDEA) Artículos
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