Effect of spectral dependencies of radiation-induced attenuation in polarization maintaining fibers on interferometric fiber optic gyroscope at near-infrared wavelengths

摘要

In order to analyze the effect of spectral dependencies of radiation-induced attenuation in polarization maintaining fibers on interferometric fiber optic gyroscopes at near-infrared wavelengths, phosphorus-doped, germanium-doped and pure-silica-core fibers were exposed to a ~(60)Co γ-radiation source, as well as their spectral properties were compared and interpreted by color centers theory involving total dose-dependent infrared absorption bands. Based on testing and comparing the radiation-induced attenuation spectra, the loss variation and mean wavelength shift in fibers at 1300 nm and 1550 nm wavelengths are discussed. Finally, the random walk coefficient degradation and scale factor error induced by spectral dependencies of radiation-induced attenuation in fibers are verified.