All-optical mode and wavelength converter based on parametric processes in a three-mode fiber

We demonstrate, both experimentally and numerically, all-optical mode and wavelength conversion both within the C-band and between the C- and L-bands. This is achieved by exploiting phase-matched inter-modal four-wave-mixing processes among the spatial modes of a three-mode fiber. By increasing the number of spatial modes supported by the fiber and tailoring their dispersion profile, it is envisaged that broadband operation over widely separated wavelength bands can be achieved in a single multi-mode fiber using this method.