GENERATION OF SUPERBROADENING VISIBLE SPECTRUM BY PUMPING 2 KINDS OF FIBERS SUCCESSIVELY WITH AN INTENSE LASER

We report on an experiment on generating a superbroadening spectrum (> 100 nm) by pumping two kinds of fibers (silica fiber and CS2 liquid-c ore fiber) successively with an intense laser for the first time. We d emonstrate that self-phase modulation (SPM), stimulated Raman scatteri ng (SRS) in silica fibers and the efficient amplification through stim ulated Kerr scattering (SKS), SRS processes in CS2 liquid-core fiber a re several main mechanisms accounting for the superbroadening. It give s a useful indication that the technique employing a silica fiber foll owed by a CS2 liquid-core fiber is a good way to achieve super-broaden ing spectrum that can be developed for practical uses.