Harnessing the modulation instability spectrum in optical fibers with a   periodic dispersion landscape
  We report the experimental demonstration of modulation instability process assisted by a dispersion grating in an optical fiber. A simple analytical model is developed to further analyze and explain the complex dynamics of this process, showing that each of the multiple spectral components grows thanks to a quasi phase-matching mechanism inherent to the periodicity of the waveguide parameters. This model is confirmed by numerical simulations and it is successfully used to tailor the multi-peak modulation instability spectrum shape. These theoretical predictions are confirmed by experiments. 
Maxime Droques, Alexandre Kudlinski, Geraud Bouwmans, Gilbert   Martinelli and Arnaud Mussot
physics.optics