摘要
四波混频(FWM)效应是相干光正交频分复用(CO-OFDM)系统中最主要的非线性作用。分析基于小波变换的相干光正交频分(WT-OOFDM)系统原理,研究小波变换对FWM效应和光放大器自发辐射(ASE)引起的相位噪声的改善效果。数值结果表明,在采用常规G.652光纤,100Gbit/s的WT-OOFDM传输1500km时,非线性相位噪声降低20%,总相位噪声降低15%。
Four-wave mixing （FWM） is the most important nonlinear effect in coherent optical orthogonal frequency-division multiplexing （CO-OFDM） system. The principle of CO-OFDM system based on wavelet transforms （WT-OOFDM） is analyzed, and effect of wavelet transforms on phase noise caused by FWM and amplified spontaneous emission （ASE） of optical amplifiers is discussed. For the conventional optical fiber G. 652, 100 Gbit/s WT-OOFDM system, the simulation results show that the variance of the total phase noise can be decreased by 15 %, and the nonlinear phase noise has a 20% reduction while the transmission distance reaches 1500 km.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2012年第11期79-82,共4页
Acta Optica Sinica
关键词
非线性光学
相位噪声
四波混频
小波变换
nonlinear optics
phase noise
four-wave mixing
wavelet transforms
