一种高性能抗辐照掺铒光子晶体光纤光源

In order to meet the requirement of high-precision fiber optic gyroscope in space environment, a scheme of radiation-resistant Er-doped Fiber Source (EDFS) is brought forward based on the "Er-doped photonic crystal fiber (PCF)". A sort of highly Er-doped PCF is developed to improve the luminescence characteristic by optimizing the doping concentration ratio of Er³⁺/Al³⁺. To minimize the spectrum variation of the SFS under radiation environment, the fiber length is optimized and the optimal output spectrum is confirmed experimentally. An Er-doped photonic crystal fiber light source (EDPCFS) suitable for space irradiation environment is designed by combining "flatness spectrum filtering" and "close-loop feedback control of pump current" technologies. The irradiation test results show that the EDPCFS bandwidth is larger than 40 nm, the mean-wavelength stability is 2.6×10^-6/krad, and the output power attenuation is less than 0.2 dB under γ-irradiation of 200 krad, showing that it has good anti-irradiation effect.