High efficient single frequency fiber random laser operating in the telecommunication band

The paper presents the latest results on the creation of high efficient single frequency «random» fiber lasers with cavity based on erbium doped optical fiber (OF) with an array of fiber Bragg gratings (FBG) inscribed during the OF’s drawing process. Lasing with a maximum efficiency of 33% and linewidth of about 550 Hz was obtained at wavelengths of 1548 nm with pumping at a wavelength of 975 nm.