par Izús, Gonzalo;Miguel, Maxi San;Walgraef, Daniel
Référence Physical review. E, Statistical, nonlinear, and soft matter physics, 66, 3, page (036228/1-036228/12), 036228
Publication Publié, 2002-09
Article révisé par les pairs
Résumé : We study the role of a direct intracavity polarization coupling in the dynamics of transverse pattern formation in type-II optical parametric oscillators. Transverse intensity patterns are predicted from a stability analysis, numerically observed, and described in terms of amplitude equations. Standing wave intensity patterns for the two polarization components of the field arise from the nonlinear competition between two concentric rings of unstable modes in the far field. Close to threshold a wavelength is selected leading to standing waves with the same wavelength for the two polarization components. Far from threshold the competition stabilizes patterns in which two different wavelengths coexist. © 2002 The American Physical Society.