动态光网络中交叉相位调制和放大自发辐射噪声积累效应的传输代价  

Transmission Penalty of Dynamical Optical Networks Considering Accumulation Effects of XPM and ASE Noises

作　　者：张欢[1] 李蔚[1] 梅君瑶[1] 王腾[1] 迟楠[1] 黄德修[1] 

机构地区：[1]华中科技大学光电子科学与工程学院武汉国家光电实验室,湖北武汉430074

出　　处：《中国激光》2009年第5期1111-1117,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(60772013;60777010);华中科技大学科研基金(2006M041)资助课题

摘　　要：研究了动态密集波分复用(DWDM)光网络中直接调制-强度检测(IM-DD)系统中的交叉相位调制(XPM)和放大自发辐射(ASE)导致的动态噪声积累效应对高速光脉冲传输时的强度噪声影响,修正目前1M-DD系统中传输代价Q参数的计算公式。通过仿真分析了动态网络环境下两种噪声积累对动态光路径接收端误码率(BER)的影响,得出了XPM相位噪声与动态网络中光纤段长度、段数、波长信道间隔、链路ASE噪声等存内的链路参数之间的关系。对于动态光网络中链路的选择具有很好的参考价值。Accumulated intensity noises are investigated and the noises are induced by cross-phase modulation （XPM） effect and amplified spontaneous emission （ASE） in dynamic intensity-modulation direct-detection （IM-DD） optical fiber links with multiple fiber segments. A reasonable correction for Q parameter while computing the transmission penalty considering higher order XPM effect is added in the expression of XPM induced degradation. The effect on bit error rate of dynamic lightpath link caused by the two noises is elicited through simulation analysis. The relation between XPM effect and the links＇ structure parameters in dynamic network, including the length of fiber segments, wavelength spacing, amplified spontaneous emission noise from amplifiers, etc., are proposed theoretically and numerically, and it is very useful for dynamical link establishment.

关 键 词：光通信 动态光网络 密集波分复用 直接调制-强度检测系统 交叉相位调制 放大自发辐射噪声 强度噪声 

分 类 号：TN929.11[电子电信—通信与信息系统]