Abstract
Modulational instability (MI) is a nonlinear process which results from the interplay between dispersive and nonlinear effects and leads to the exponential amplification of weak perturbations at the expense of a strong pump. In optical fibers, in large anomalous dispersion regions, MI is affected by the value of the group velocity dispersion (β2) and can only exist in this spectral window. In weak dispersion regions, the contribution of higher order dispersion terms must be accounted for (β4) to accurately model the system. Consequently, it can be shown that MI exists in weak normal dispersion regions [1]. In fiber cavities, most investigations have been carried out in large dispersion regions where the contribution of β4 is negligible, except in a theoretical study [2].
© 2017 IEEE
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