正交频分复用信号的全光波长变换性能研究  

All-Optical Wavelength Conversion for Orthogonal Frequency Division Multiplexing Optical Signal

作　　者：周慧[1] 董泽[1] 曹子峥[1] 卢嘉[1] 何晶[1] 陈林[1] 余建军[1] 

机构地区：[1]湖南大学计算机与通信学院微纳光电器件及应用教育部重点实验室,湖南长沙410082

出　　处：《光学学报》2010年第4期959-964,共6页Acta Optica Sinica

基　　金：国家863计划(2007AA01Z263);湖南省自然科学基金(06JJ50108);教育部光通信和光波技术重点实验室开放基金资助课题

摘　　要：实验验证了在半导体光放大器(SOA)中基于四波混频(FWM)效应的单抽运、垂直双抽运和平行双抽运对光正交频分复用(OFDM)信号波长变换特性。信号光源经2.5 Gb/sOFDM电信号直接调制后和抽运光耦合,经光放大器后在SOA中实现波长变换。实验结果显示,经SOA的FWM效应后,产生新波长的信号光将携带OFDM信号。实验测量了转换的OFDM信号的误码特性曲线图和星座图,结果表明,平行双抽运模型的系统功率代价最小。实验结果与理论分析是一致的。We experimentally demonstrate three schemes of pumping including single pump,orthogonal-dual-pump and copolarized-dual-pump based on four-wave mixing（FWM） in semiconductor optical amplifier（SOA） for the wavelength conversion of optical amplifier（OFDM） signals.In experiment,the signal continuous-wave（CW） lightwave is modulated directly by 2.5 Gb/s OFDM.The modulated signal lightwave and pump light are coupled and then amplified before they are injected into the SOA for wavelength conversion.Experimental results show that the newly converted wavelength signals carry the original OFDM signals.The bit error rate（BER） curves and received constellations are also measured by experiment,the experimental results show that the copolarized-dual-pump configuration has the smallest system power penalty,which agree well with the theoretical analyses.

关 键 词：光通信 全光波长变换 四波混频 单抽运 垂直双抽运 平行双抽运 正交频分复用 

分 类 号：TN929.9[电子电信—通信与信息系统]