【作者】 石梦静； 蔡添志； 张磊； 马乐； 刘月； 蔡志平； 许惠英；

【Author】 SHI Meng-jing~1 CAI Tian-zhi~1 ZHANG Lei~1 MA Le~1 LIU Yue~2 CAI Zhi-ping~2 XU Hui-ying~2 (1.Department of Physics,Xiamen University,Xiamen 361005,China; 2.Department of Electronic Engineering,Xiamen University,Xiamen 361005,China)

【机构】 厦门大学物理系； 厦门大学电子工程系；

【摘要】 测量了常温下,Er³⁺离子在氟化物玻璃 ZBLALip 中的吸收光谱和荧光寿命;应用 Judd-Ofelt 理论计算了 Er³⁺离子的谱线强度、自发辐射几率 A、荧光分支比β和辐射寿命τ_rad等光谱参量,并拟合了相应的强度参数Ω（t=-2,4,6）,分别为Ω₂=2.80×10^-20cm²,Ω₄=0.95×10^-20cm²,Ω₆=0.94×10^-20cm²; 利用 McCumber 理论计算了能级⁴Ⅰ_13/2→⁴Ⅰ_15/2跃迁的受激发射截面σ_em;通过计算发现,该材料的量子效率较高,达到90%,可成为新的激光材料,为拉制高 Q 值的光学介质微球腔提供了参考。更多还原

【Abstract】 A new fluoride glass composition revealing a high stability,with a weak nucleation tendency,has been studied.The Judd-Ofelt intensity parameter Ω_t（t=2,4,6）of a novel Er³⁺doped ZBLALip based glasses deriving from the absorption spectra were acquired as followS:Ω₂=2.80×10^-20cm², Ω₄=0.95×10^-20cm²,Ω₆=0.94×10^-20cm².McCumber theory was used to calculate the stimulated emission cross section of ⁴I_13/2→⁴I_15/2transition,the result was 4.2×10^-21cm².In addition,the lifetime of the ⁴I_13/2 level of Er³⁺ions was 9.2 ms,and the quantum efficiency was 90%.The novel Er³⁺doped glasses can be used in fabricationing high Q quality factor dielectric microcavities.更多还原