羟基对掺铒铋酸盐玻璃1.53μm波段荧光及信号放大特性的影响

EFFECTS OF HYDROXYL GROUP ON THE 1.53 μm BAND FLUORESCENCE OF ERBIUM-DOPED BISMUTHATE GLASS AND SIGNAL AMPLIFICATION PERFORMANCE

用高温熔融法制备了组分为Bi2O3-B2O3-SiO2铋酸盐掺铒玻璃,研究了羟基含量对玻璃中Er3+的1.53μm波段荧光和对光纤中信号放大特性的影响。研究表明:通过氧气鼓泡除水处理,能有效地去除玻璃中羟基,从而显著提高1.53μm波段荧光强度。同时,对铋酸盐掺铒玻璃光纤中Er3+离子数速率方程和光功率传输方程的理论模拟表明:减少纤芯玻璃中羟基含量可以使1520～1620nm范围内信号增益得到不同程度的提高。因此,除水处理对于铋酸盐掺铒玻璃应用于1.53μm波段宽带光纤放大器是非常必要的。

Eu-doped bismuth-based glasses with the composition of Bi2O3-B2O3-SiO2 were prepared by the high temperature melting method,and the effects of OH content on the 1.53 μm band fluorescence of Er3＋ doped bismuth-based glass and signal amplification performance of the fiber with the same glass composition were investigated.The results indicate that the content of OH in the glass can be reduced effectively by bubbling oxygen gas during melting,and then the 1.53 μm band fluorescence intensity is significantly improved.Additionally,the theoretical simulation based on the population rate equation of Er3＋ and light power propagation equation indicates that the signal gain in 1 520-1 620 nm can also be improved by reducing the OH content in the fiber core glass.Therefore,it is necessary to remove as many OH groups as possible when bismuth-based glass is applied to 1.53 μm band broad erbium-doped fiber amplifier.