The effect of structural irregularities in photonic crystal fibers on scalar and vector modulational instability (MI) processes is studied by numerical simulations and experiments. For an anomalous-dispersion regime pump, variations in core ellipticity as small as 0.5% over length scales of the order of several meters are shown to have a negligible effect on scalar MI, yet they completely suppress vector MI.In contrast, for a normal-dispersion regime pump, vector MI is shown to be robust against such fluctuations.
© 2004 Optical Society of America
(060.2400) Fiber optics and optical communications : Fiber properties
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
Bertrand Kibler, Cyril Billet, John M. Dudley, R.S. Windeler, and Guy Millot, "Effects of structural irregularities on modulational instability phase matching in photonic crystal fibers," Opt. Lett. 29, 1903-1905 (2004)