Simulation and experimental study of high power fiber lasers

High power fiber laser was dernonstrated by using Yb-doped double-clad fiber based on laser cavity consisted of both fiber Bragg gratings spliced onto fiber ends, which pumped by a fiber-coupled multimode laser diode (FMLD) with 970nm central wavelength. In our experiment star-shape double clad Ytterbium-doped fiber was used, the MAX output power and centre is 6W cw and central wavelenght of 1100nm respectively, FWHM is about 0.66nm, the slope efficiency is about 51%.