title: Efficient frequency shifting of dispersive waves at solitons.
abstract: We demonstrate frequency redshifting and blueshifting of dispersive waves at group velocity horizons of solitons in fibers. The tunnelling probability of waves that cannot propagate through the fiber-optical solitons (horizons) is measured and described analytically. For shifts up to two times the soliton spectral width, the waves frequency shift with probability exceeding 90% rather than tunnelling through the soliton in our experiment. We also discuss key features of fiber optical Cherenkov radiation such as high efficiency and large bandwidth within this framework.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK.
authors.forename: Amol
authors.initials: A
authors.lastname: Choudhary
authors.forename: Friedrich
authors.initials: F
authors.lastname: König
mesh_terms: D003198:Computer Simulation; D005336:Fiber Optic Technology; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation