光纤拉曼放大器瞬态效应的时域差分研究  

Simulation of fiber Raman amplifiers by one demension FDTD

作　　者：黄必昌[1] 高致慧[2] 洪泽华[1] 虞爱华[3] 

机构地区：[1]深圳大学师范学院,广东深圳518060 [2]深圳大学工程技术学院,广东深圳518060 [3]昂那集团,广东深圳518000

出　　处：《红外与激光工程》2006年第z3期334-338,共5页Infrared and Laser Engineering

基　　金：深圳市科技基金项目

摘　　要：首次提出了将中心时域有限差分法(FDTD)用于研究拉曼放大器(FRA)的瞬态效应,该算法能够适合前向和后向泵浦拉曼放大器。经过模拟表明:此法速度快,效率高,能够实时计算出输出信号的功率,适合 FRA 瞬态效应的研究和 FRA 实时增益比例、微分、积分(PID)控制系统。运用此方法,在20km 的高非线性单模光纤(SMF)中模拟得到瞬态发生延迟100μs,结束于300μs,中间为一振幅不断减小的类似于正弦的运动曲线,这与实验结果一致。实践表明:此法和传统 Runge-Kutta 相比,简单易懂,对于动态系统研究有明显的优势。A new algorithm for solving the coupling propagation equations by FDTD is proposed.This method can be used in not only the forward pumped Raman amplifiers,but also the amplifiers of backward.It is confirmed that simulation is effective and can reduce simulation time greatly with the same accuracy in compare with classical ways,which is capable of PID controller for suppressing the Raman transient.The amplifier consists of 20 km single-mode fiber(SMF) and the transient was happened at 100 μs later and ended at 300 μs later,there is a attenuation sine wave motion curve between them,which is the same as experimental conclusion.So it is an advisable method for the investigation of Raman transient.

关 键 词：拉曼放大器 瞬态效应 时域有限差分法 

分 类 号：TN929.11[电子电信—通信与信息系统]