【摘要】 采用高温烧结工艺制备了多种掺杂浓度的掺铒硼硅酸盐玻璃、镱铒共掺硼硅酸盐玻璃样品。依据扎得-奥菲而特(Judd-Ofelt,J-O)理论计算了三价铒离子扎得-奥菲而特强度参量Ωk(k=2,4,6)和自发辐射寿命、自发辐射跃迁几率、荧光分支比、谱线强度等参量。用麦克库玻(McCumber)理论分析了镱铒共掺硼硅酸盐玻璃铒离子上转换红光(4F9/2→4I15/2)、绿光(2H11/2→4I15/2)的受激发射截面。结果表明,随着掺铒硼硅酸盐玻璃中铒离子浓度的增加,扎得-奥菲而特参量Ω2变小;镱铒共掺硼硅酸盐玻璃的Ω2则随掺镱浓度的提高而增大,且高于已有的硅酸盐、氟化物、铋酸盐玻璃的相应值,同时上转换红光和绿光的受激发射截面略有增加。更多还原

【Abstract】 The samples of Er³⁺-doped,Yb³⁺∶Er³⁺co-doped borosilicate glasses with different dopant concentrations were prepared by the high-temperature sintering technique.Based on Judd-Ofelt（J-O）theory,the J-O intensity parameters Ωk（k=2,4,6）,spontaneous radiative lifetime,spontaneous transition probability,fluorescence branching ratio,and spectral line strength of the Er³⁺ions were calculated.While the stimulated emission cross sections of the up-conversion red（4F9/2→4I15/2）and green（2H11/2→4I15/2）emission of Er³⁺ions were analyzed using McCumber theory.The results show that J-O intensity parameter Ω2 becomes smaller with the increase of erbium concentration in Er³⁺-doped borosilicate glasses.But for the Yb³⁺∶Er³⁺co-doped borosilicate glasses,the value of Ω2 becomes bigger with the increase of ytterbium concentration,and bigger than that of silicate,fluorid,and bismuth glasses reported.The stimulated emission cross sections of the up-conversion red and green emission increas a little.更多还原