Multiple QPM Resonant Radiations Induced by MI in Dispersion Oscillating Fibers

The propagation of a continuous wave in the average anomalous dispersion region of a dispersion oscillating fiber is investigated numerically and experimentally. We demonstrate that the train of solitons arising from modulation instability is strongly affected by the periodic variations of the fiber dispersion. This leads to the emission of multiple resonant radiations located on both sides of the spectrum. Numerical simulations confirm the experimental results, and the position of the resonant radiations is well predicted by means of perturbation theory.