公开(公告)号：US20020181074A1

公开(公告)日：2002-12-05

申请号：US09873389

申请日：2001-06-05

Applicant: Nortel Networks Limited

Inventor： Saeid Seydnejad ,  Zhuhong P. Zhang

IPC: H01S003/00

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/10069 ,  H01S2301/04

Abstract: In a method and apparatus for measuring and controlling signal gain of a backward Raman amplifier having multiple pump lasers as used in optical communications networks, Raman pump power levels required to provide a uniform gain across a range of wavelengths in an optical fiber are determined by a combination of theoretical calculations and empirical measurement. A system of non-linear differential equations is solved for various pump powers and used to build a look-up table relating desired average Raman gain to the relative pump powers required to provide a uniform gain across a range of wavelengths. The linear relationship between Raman pump power and average Raman gain is determined by measuring data signal power levels at specific Raman pump powers. A desired average Raman gain is first applied to the linear relationship to determine total power required, and then applied to the look-up table to determine the required relative pump powers.

Abstract translation: 在用于光通信网络中的用于测量和控制具有多个泵浦激光器的反向拉曼放大器的信号增益的方法和装置中，在光纤中的波长范围内提供均匀增益所需的拉曼泵浦功率电平由 理论计算和经验测量的组合。 解决了各种泵浦功率的非线性微分方程系统，并用于构建一个查询表，其将期望的平均拉曼增益与在波长范围内提供均匀增益所需的相对泵浦功率相关联。 拉曼泵浦功率和平均拉曼增益之间的线性关系通过测量特定拉曼泵功率下的数据信号功率电平来确定。 首先将所需的平均拉曼增益应用于线性关系以确定所需的总功率，然后应用于查找表以确定所需的相对泵浦功率。