铋铒共掺光纤在低温环境下的荧光特性研究

Fluorescence characteristics of bismuth / erbium co-doped optical fiber (BEDF) and erbium-doped optical fiber (EDF) were studied under liquid nitrogen environment. It was found that for bismuth ion-doped optical fiber at 830nm laser pumping, the intensity of Amplified Spontaneous Emission (ASE) is affected by the low temperature environment caused by liquid nitrogen. It was observed experimentally that the ASE strength of BEDF at low temperature was higher than that at normal temperature, while the ASE strength of EDF was lower at low temperature. The comparative analysis shows that the erbium element play an important role in the fluorescence enhancement of BEDF, and the luminescence energy associated with the erbium element shifts to the luminescence center related to the bismuth element under the condition of low temperature.