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研制了铋酸盐基质掺铒玻璃43Bi2O3-30B2O3-27SiO2,测试分析了玻璃中Er3+离子的光谱性质。结合获得的Er3+离子光谱参数,建立了一个以该铋基掺铒玻璃作为放大器增益介质时Er3+离子跃迁的三能级理论模型,研究了铋基掺铒玻璃光纤放大器(Bi-EDFA)的信号放大特性。研究显示,单波长输入情形下,Bi-EDFA具有大于40dB的信号增益和75nm的3dB波长带宽。同时,相比于硅基掺铒光纤放大器(Si-EDFA),Bi-EDFA具有优异的多波长信号宽带放大和低噪声特性,低噪声系数(~5.5dB)可维持至1610nm波长之外。结果表明,铋基掺铒玻璃光纤放大器是一种单位长度增益极高和宽带放大能力的小型化掺铒光纤放大器,适合于WDM系统的集成化需求。
The bismuth-based erbium-doped glass 43Bi2O3-30B2O3-27SiO2 was prepared and the spectral properties of Er3 + ions in the glass were tested. A three-level theoretical model of Er3 + ion transition of Er3 + ions with Er3 + ions was established based on the Er3 + ion spectra. The signal amplification of bismuth-based erbium-doped glass fiber amplifier (Bi-EDFA) characteristic. Studies have shown that the Bi-EDFA has a signal gain of more than 40 dB and a 3dB wavelength bandwidth of 75 nm at a single wavelength input. At the same time, Bi-EDFA has excellent wideband multi-wavelength signal amplification and low noise compared to Si-EDFA, and low noise figure (~ 5.5dB) can be maintained beyond 1610nm. The results show that the bismuth-based erbium-doped glass fiber amplifier is a miniaturized erbium-doped fiber amplifier with extremely high gain per unit length and wideband amplification capability, which is suitable for the integration of WDM systems.