Polarization coupling and pattern selection in a type-II optical parametric oscillator

Details Polarization coupling and pattern selection in a type-II optical parametric oscillator Polarization coupling and pattern selection in a type-II optical parametric oscillator

2001-12-03

arxiv.org/abs/nlin/0112005v2

Nonlinear Sciences

Pattern Formation and Solitons

14 figures

Scientific paper

10.1103/PhysRevE.66.036228

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.

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