The influence of Er-doped fiber source under irradiation on fiber optic gyro

The relationship between the parameters of Er-doped fiber source (EDFS) and the performance of fiber optic gyro (FOG) is analyzed in theory firstly. Then, the irradiation resistance characterizations of FOG using EDFS with and without spectrum trimming are compared. Through the theory analysis and experimental research, it is confirmed that the mean wavelength of the EDFS with spectrum trimming varies less than the EDFS without spectrum trimming under irradiation, and the FOG used EDFS with spectrum trimming have more stable performance under irradiation. Therefore, to trim EDFS’s spectrum into a Gaussian-like spectrum is an effective manner to suppress the irradiation influence on FOG.

► The.performance evolvement rules of EDFS under irradiation are given.
► The performance evolvement rules of FOG with EDFS under irradiation are specified.
► To trim the spectrum of EDFS is an effective method to suppress the irradiaton-induced drift in FOG.