MULTI-WAVELENGTH COMB GENERATED BY THE FOUR WAVE MIXING USING HIGHLY NONLINEAR HAFNIUM BISMUTH ERBIUM-DOPED FIBER

A multi-wavelength comb is realized by employing both Stimulated Brillouin Scattering (SBS) and Four-Wave Mixing (FWM) effects by using newly developed Hafnium Bismuth Erbium-Doped Fiber (HB-EDF) and Photonic Crystal Fiber (PCF). The cavity use 50 cm long of HB-EDF as linear gain medium and 100 m long of PCF as nonlinear gain medium. The mechanism of the laser is based on the combination of SBS and FWM process inside a ring cavity. A multi-wavelength laser comb with a constant line spacing of 0.26 nm was obtained at the optimum BP power of 0.439 mW. The fibers laser have a compact design since it use a short length of highly nonlinear HB-EDF and photonic crystal fiber as the gain medium.