Emission of dispersive waves from a train of dark solitons in optical   fibers
  We report the experimental observation of multiple dispersive waves emitted in the anomalous dispersion region of an optical fiber from a train of dark solitons. Each individual dispersive wave can be associated to one particular dark soliton of the train, using phase-matching arguments involving higher-order dispersion and soliton velocity. For a large number of dark solitons (>10), we observe the formation of a continuum associated with the efficient emission of dispersive waves. 
T. Marest, C. Mas Arabi, M. Conforti, A. Mussot, C. Milian, D.V.   Skryabin, and A. Kudlinski
nlin.PS physics.optics