碲酸盐掺铒玻璃光纤放大器的瞬态响应  

Transient response of tellurite-based erbium-doped glass fiber amplifier

作　　者：屈卫清[1] 周灵[2] 陈芬[2] 周亚训[2] 

机构地区：[1]宁波大红鹰职业技术学院,浙江宁波315175 [2]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《量子电子学报》2008年第3期369-374,共6页Chinese Journal of Quantum Electronics

基　　金：浙江省自然科学基金(M603019);宁波市自然科学基金(2006A610026)资助课题

摘　　要：建立了一个数值模拟碲酸盐掺铒玻璃光纤放大器(EDTFA)瞬态响应的理论模型,理论上研究分析了低频方波脉冲输入信号经过EDTFA后的瞬态输出响应。研究结果显示,对于输入信号功率的跃变,EDTFA存在着一个快速的瞬态响应过程,响应时间小于报道的硅基掺铒光纤放大器(EDFA),说明EDTFA适合于泵浦调制及全光纤开关方面的应用场合。通过对双通道信号传输情形下关闭一个信道后另一信道输出功率瞬态响应的研究,揭示了适时调节泵浦功率快速稳定剩余信道输出功率的可行性。A theoretical model to simulate the transient response of tellurite-based erbium-doped fiber amplifier （EDTFA） is proposed, and the output response characteristics of EDTFA to a low frequency square-wave pulse signal are investigated by the finite difference method. When the amplified output signal is deformed, there is a fast transient response process corresponding to the leading-edge and falling-edge of input pulse signal with response time shorter than that of silica-based EDFA, indicating that EDTFA is suitable for the applications of pump-modulated and all optical-fiber switch. By studying the transient power changing of the surviving signal when one of two channels is switched off, the feasibility of pump adjustment is demonstrated to fast limit the output power excursion of the surviving one.

关 键 词：光通信 瞬态响应 有限差分法 碲基掺铒光纤放大器 

分 类 号：TN929.11[电子电信—通信与信息系统] TN722[电子电信—信息与通信工程]