Investigation on near Gaussian-shaped spectrum erbium-doped fiber source which applied to the fiber optic gyroscope

According to the requirements of the fiber optic gyro with high-accuracy, the high-power and high-accuracy double-pass backward (DPB) erbium-doped fiber source was used. The optimization parameters of high-power, high-efficiency erbium-doped superfluorescent fiber source are designed. Near Gaussian-shaped spectrum of erbium-doped superfluorescent fiber source was designed. Near Gaussian-shaped spectrum of erbium-doped superfluorescent fiber source in single peak aside the constraints of double peak, single peak of fiber source more effective control of the temperature sensitivity and stability that mean wavelength. The ASE light source mathematical mode was established by the theoretical analysi, and of erbium-doped fiber was determined by the spectral shape analyzed the parameters of erbium-doped fiber and pump laser in the experiment. Then to erbium-doped fiber and a pump laser temperature characteristics and compensation for the research priorities of theoretical analysis, the length and the doping concentration of erbium-doped fiber and pump power and erbium-doped fiber matching test, finally the pump power is 170 mW at 974.6 nm, excellent performance has been obtained which power of the light source is 20 mW with 9.6 m erbium-doped fiber. The near Gaussian-shaped spectrum of erbium-doped superfluorescent fiber source with 0.5 ppm/°C mean wavelength stability was obtained, repeatability of the set point temperature better than 2 ppm.