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

Santagiustina, M. and Hernandez-Garcia, E. and San-Miguel, M. and Scroggie, A.J. and Oppo, G.-L. (2002) Polarization patterns and vectorial defects in type-II optical parametric oscillators. Physical Review E, 65 (3). 036610. ISSN 1063-651X (https://doi.org/10.1103/PhysRevE.65.036610)

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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.

  • Item type:Article
    ID code:80657
    Dates:
    Date
    Event
    13 February 2002
    Published
    Notes:© 2002 The American Physical Society.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:12 May 2022 08:04
    Last modified:19 Apr 2024 00:29
    URI:https://strathprints.strath.ac.uk/id/eprint/80657
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