Soliton Self-Frequency Shift Cancellation in Photonic Crystal Fibers

We report the cancellation of the soliton self-frequency shift in a silica-core photonic crystal fiber with a negative dispersion slope. Numerical and exper-imental results show that stabilization of the soliton wavelength is accompa-nied by exponential amplification of the red-shifted Cherenkov radiation emit-ted by the soliton. The spectral recoil from the radiation acts on the soliton to compensate for the Raman frequency shift. This phenomenon may find appli-cations in the development of a family of optical parametric amplifiers. Solitary waves, or solitons, are self-localized regions of energy or matter that occur in a large variety of fundamental processes in many natural and artificially created non-linear systems, such as the sea surface, nerve fibers, superconducting transmission lines, optical fibers, elementary particles, and outer space (1). Optical solitons ar