用高温熔融法制备了Er3+掺杂50Bi2O3-(50-x)B2O3-xGa2O3(x=0,4,8,12,15 mol%)系列玻璃,测试了上述玻璃样品的吸收光谱、荧光光谱、荧光寿命及热稳定性.分别应用Judd-Ofelt理论和McCumber理论计算了Er3+强度参数和受激发射截面.研究发现,当Ga2O3含量在mol 8%时,荧光半高宽(FWHM)、峰值发射截面(σpeak e)和4I13/2能级荧光寿命(τm)均达到了峰值,其FWHM和σpeake分别为81 nm和1.03×10-20cm2.热稳定性则随着Ga2O3含量的增加而改善,析晶开始温度(Tx)和玻璃转变温度(Tg)之间的差值(△T)最高达到了261℃.研究表明,含适当重金属Ga2O3的铋硼酸盐玻璃具有较好的光学性能和热稳定性,适合于作为高增益、低噪声的宽带掺铒光纤放大器的基质材料.
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