Novel fiber lasers around 1.5~1.6 μm with the ingenious applications of volume Bragg Gratings

Based on the novel use of a pair of Volume Bragg Gratings (VBGs) Narrow linewidth and widely tunable dual-wavelength fiber lasers were demonstrated. With serially-paired VBGs, the linewidth of the fiber lasers was less than 38 pm at 1545.3 nm in Er, Yb co-doped fiber laser; and about 65 pm at 1657.9 nm in a silica based Raman fiber laser. With parallel-paired VBGs, dual-wavelength laser could be obtained, the wavelength difference can be tuned over 29 nm in Er, Yb co-doped fiber laser; and more than 60 nm in Raman fiber laser. In-band pumping of Er³+-ion doped high power ceramic lasers using this kind of fiber sources will be presented.