Multiphoton process and optical amplification in Er³⁺-Yb³⁺-doped fiber pumped by Ti:Al₂O₃ tunable laser at 980-nm band

【摘要】 <正> The .Er³⁺-Yb³⁺-doped fiber has a broadened absorption spectrum, which means the pumping sources can work efficiently from 810 to 1100nm. Among them 980nm is the maximum.absorption （10 dB/km） wavelength. By energy transferring and multiphoton process, the visible and ultraviolet radiation occurs when the Er³⁺-Yb³⁺-doped fiber is pumped by the laser at 980-nm band. Further researches on the mechanism of the fluorescence of Er³⁺-Yb³⁺-doped silica fiber pumped by Ti: A1₂O₃ tunable laser at 980-nm band are helpful to更多还原