掺Er^3＋镓磷酸盐玻璃的光学性质

利用熔融淬火法制备了摩尔分数为40．8Ga2O3-58．0NaPO3-1．2Er2O3掺Er^3＋镓磷酸盐玻璃，测试并研究了样品中Er^3＋的吸收光谱、1．5μm发射光谱，根据Judd-Ofelt理论计算了Er^3＋离子强度参量Ωt（t=2，4，6）及自发辐射概率、荧光分支比、自发辐射寿命．结果表明，Er3＋1．5μm发射光谱半峰全宽达到40nm．同时，利用McCumber方法计算了Er^3＋4 I13／2→^4I15／2跃迁的受激发射截面，峰值达到6．10×10^-21cm^2，测定了Er^3＋4I13／2能级荧光寿命为4．88ms，^4I13／2能级量子效率为56．3％．

OPTICAL PROPERTIES OF ERBIUM DOPED GALLIUM PHOSPHATE GLASSES

Er^3＋-doped gallium phosphate glasses with the compositions of 40. 8Ga2O3-58. 0NaPO3-1. 2Er2O3 （mol%） were synthesized by melt-quenching method. Absorption and 1.5 μm emission spectra of Er^3＋ were recorded and investigated. According to Judd-Ofelt theory, the intensity parameters Ωt（t = 2,4,6） were calculated, by which spontaneous emission probabil- ity, fluorescence branching ratio, radiative lifetime of Er^3＋ were evaluated. The full width at half maximum of 1.5μm emission spectrum is 40 nm. The stimulated emission cross-section at ^4I13/2→^4I15/2 transition of Er^3＋ were calculated by McCumber method, and the peak value were found to be 6. 10×10^-21 cm^2. The measured lifetime of level ^4I13/2 of Er^3＋ is 4. 88 ms, the quantum efficiency is 56.3 %.