We investigate experimentally resonant radiation processes driven by slow solitons in a dispersion-engineered photonic crystal waveguide in a regime virtually free of dissipative nonlinear processes (two-photon absorption and Raman scattering). Strong (30% energy conversion) Cherenkov-like radiation accompanied by the blue self-frequency shift of the soliton is observed close to the zero dispersion point, and is explained in terms of the soliton-radiation locking of the velocity.
Colman, P., Combrié, S., Lehoucq, G., De Rossi, A., & Trillo, S. (2012). Blue self-frequency shift of slow solitons and radiation locking in a line-defect waveguide. Physical Review Letters, 109(9), 093901. https://doi.org/10.1103/PhysRevLett.109.093901