Mode structure in continuum generation

Abstract

A systematic, wavelength-resolved study of micro-structured optical fibre input coupling dependence has revealed wavelength-dependent higher order mode structure and orientation in the generated continuum. The constituent continuum wavelengths are not well matched by current theory.

Sparse supercontinuum with low order solitons in higher order electromagnetic modes

“…When these solitons fission and undergo self-Raman shifting to longer wavelengths, they demonstrate the characteristic extreme broadening of the input pump light over multiple frequency octaves, but with a sparse and dispersed spectrum displaying a small number of discrete peaks [11,12], rather than the filled-in continuous supercontinuum now available as a commercial product. Supercontinuum generation has reliably been seen in multiple EMMs and has been noted for the change in the continuum and the unique changes it adds to the spectrum [13,14] as a result of significant changes to the waveguide dispersion.…”