摘要
A new type of optical amplifier based on co-doping erbium in thulium doped fiber is proposed to realize S＋C band gain by dual-wavelength （800＋1410 nm） pumping scheme which is obtainable from laser diode. A novel model is established for the co-doped fiber considering the Er^3＋ to Tm^3＋ energy transfer process. Using appropriate fiber parameters and energy transfer parameters, the coupled rate equations are analyzed and solved, the concentrations of Er^3＋ and Tm^3＋ and fiber length were optimized to get more uniform gain. The results predicted that the S＋C band gain can be achieved at the same time by co-doping erbium in thulium doped fluoride fiber.
A new type of optical amplifier based on co-doping erbium in thulium doped fiber is proposed to realize S＋C band gain by dual-wavelength （800＋1410 nm） pumping scheme which is obtainable from laser diode. A novel model is established for the co-doped fiber considering the Er^3＋ to Tm^3＋ energy transfer process. Using appropriate fiber parameters and energy transfer parameters, the coupled rate equations are analyzed and solved, the concentrations of Er^3＋ and Tm^3＋ and fiber length were optimized to get more uniform gain. The results predicted that the S＋C band gain can be achieved at the same time by co-doping erbium in thulium doped fluoride fiber.
基金
This work was supported by the China Scholarship Council, the Natural Science Foundation of Shandong Province of China (No. Y2003G01, Y2002G06)the Research Found for the Doctoral Program of High Ed-ucation of China (No. 20020422048).
