LAUSR

Abstract. We comprehensively investigate the radiation-induced active band attenuation (RIABA) characteristic of erbium (Er)-doped fiber. It is experimentally shown that the RIABA gradually alleviated with radiation dose increasing and the absorption/luminescence characteristics of Er3  +   appear to be unaffected by irradiation ray. By employing the intrinsic luminescence spectrum of Er3  +   as the original output spectrum, a radiation-resistant low noise broadband source with specially customized Er-doped photonic crystal fiber and multiple radiation-resistant methods is proposed. Under 50 krad irradiation dose, it demonstrates mean-wavelength stability of 26.4 ppm and the output power attenuation of <0.1  dB. Throughout the irradiation, the 3 dB bandwidth of the output spectrum is >40  nm. The broadband source proposed exhibits excellently comprehensive performances in the radiation environment and is quite feasible for strategic high-accuracy interferometric fiber-optic gyroscopes.