Sparse supercontinuum with low order solitons in higher order electromagnetic modes

By fine control of initial launch conditions and utilizing the dispersion properties of micro-structured optical fibre for the transmission of higher order electro-magnetic modes, very low order solitons have been generated in a spectrally sparse continuum. The few Raman self-frequency shifted solitons in the near IR demonstrably match with the change in wavelength of the blue emission through group refractive index matching. These experimental spectral results agree with recent theory on the wavelength shift of blue supercontinuum light