碲基掺铒光纤放大器对于渐变输入信号的瞬态响应  

Transient Response to Slowly Changed Input Signal in Tellurite-based Erbium-doped Fiber Amplifier

作　　者：周亚训[1] 周灵[1] 陈芬[1] 

机构地区：[1]宁波大学信息科学与工程学院

出　　处：《光子学报》2007年第11期2066-2070,共5页Acta Photonica Sinica

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

摘　　要：为了抑制输出信号功率的瞬态波动,提出了调理脉冲信号边沿变化方式的思想.通过有限差分法数值模拟四能级模型下的粒子数速率-光功率传输方程组,理论研究了宽带碲基掺铒光纤放大器(Erbium-doped Tellurite-based Fiber Amplifier ,EDTFA)对于低频脉冲输入信号的瞬态响应.研究表明,相比具有阶跃上升沿的方波脉冲,选择一个合适的渐变上升沿脉冲信号可以有效地抑制EDTFA输出端信号功率的瞬时上冲幅度.在多信道系统中,选择渐变的信道功率上传和下载方式,可以延缓其余信道输出功率的瞬态响应速度,从而为后续增益箍制技术的实施提供了便利.In order to suppress transient excursion of output signal, a novel scheme to modify the edge waveform of pulse signal is proposed, and transient response to a signal with slowly changed leading-edge is investigated, which is based on the finite-difference algorithm to simulate four-level rate-propagation equations of new-type broad-band tellurite-based erbium-doped fiber amplifier （EDTFA）. Compared to the square-wave pulse with step edge, it shows that the overshoot amplitude of EDTFA output power is reduced effectively when a properly designed, and slowly changed leading-edge signal is inputted in a single- channel condition. While in a multi-channel condition, the transient response rate of the residual channel can also be delayed and it is favored to the implement of a better gain clamping.

关 键 词：光纤通信 瞬态响应 有限差分法 渐变信号 碲基掺铒光纤放大器 

分 类 号：TN929.110[电子电信—通信与信息系统] TN722[电子电信—信息与通信工程]