METHOD FOR GENERATING A SPECTRAL BROADBAND SOURCE BY PHASE MATCHING INCLUDING LEAKY MODES

摘要

The invention concerns an optical waveguide for propagating an original light signal, comprising a first core (12) of non-linear waveguide, said first core (12) being capable of generating leaky modes from said original light signal, said guide comprising at least a second core, the first core being included in the second core, the second core being arranged relative to the first core so as to confine at least leaky modes generated by the first core from said original light signal outside said first core. Owing to said waveguide, in particular owing to said non linearities of the guide first core, a light continuum can be generated inside the inventive fiber by collinear phase matching. Moreover, by Cerenkov effect, other wavelengths are generated by the continuum wavelengths by collinear phase matching.