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Free keywords:
PHOTONIC CRYSTAL FIBERS; CROSS-PHASE MODULATION; DISPERSION MANAGEMENT;
ELECTROMAGNETIC-WAVES; POWER VARIATION; SIDE-BAND; SYSTEMS; LIGHTOptics; Physics;
Abstract:
We study the modulational instability induced by periodic variations of group-velocity dispersion and nonlinear coefficients in a highly birefringent fiber. We observe, for each resonance order, the presence of two pairs of genuine vector-type sidebands, which are spectrally unbalanced between the polarization components for nonzero group-index mismatch, and one pair of balanced sidebands emerging and dominating at increasing group-index mismatch. As the conventional modulational instabilitymanifests itself, it is partially suppressed by the proximity of these additional unstable regions.
