Flattening spectrum of a broadband and wavelength stable erbium doped superfluorescent fiber source

A technique is used to design the spectra in erbium doped superfluorescent fiber source experimentally and theoretically. In an erbium doped fiber wit h a 10m length and 300ppm concentration, a line width of about 42 nm and hi gh mean wavelength stability (<0.1ppm/K, <0.2ppm/mW) were obtained ty means of a suitable population distribution, and adjusting the ratio of backward to forward pump power. Also, its thermal characteristic is studied. These results will improve the performance of fiber optical gyroscope and fiber;s ensors, and will be applied in erbium doped fiber amplifier with flattening gain.