用高温熔融法制备了一种Er3+/Yb3+共掺的70TeO2-5Li2O-10B2O3-15GeO2玻璃.测试和分析了其热稳定性、吸收光谱、荧光光谱和上转换发光.应用Judd-Ofelt理论计算了玻璃中Er3+的强度参数、自发辐射跃迁几率、辐射寿命以及荧光分支比.结果表明:这种玻璃具有较好的热稳定性,较宽的荧光半高宽和较大的受激发射截面,位于532 nm、546 nm和659 nm的上转换绿光和红光,分别对应于Er3+离子2H11/2→4I15/2,4S3/2→4I15/2和4F9/2→4I15/2的辐射跃迁,是一种较为合适的宽带光纤放大器和上转换激光器的基质材料.
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