入射偏振对有线电视光发射机三阶非线性补偿的影响  

Influence of Incident Polarization on CTB Compensation Performance of CATV Optical Transmitter

作　　者：杨建良[1] 查开德[1] 

机构地区：[1]清华大学电子工程系

出　　处：《光学学报》2001年第7期787-791,共5页Acta Optica Sinica

基　　金：中国博士后科研基金 [中博基 (1997) 17号 ];华为科技基金资助项目

摘　　要：外调制光纤有线电视发射机中一般采用预失真补偿技术以提高其复合三阶差拍失真指标。分析了在此情形下入射偏振对发射机复合三阶差拍失真补偿特性的影响 ,分析计算显示 :入射光偏振态模式为TE模时系统复合三阶差拍失真补偿特性最佳。对入射偏振态偏离TE模的情形的理论分析与实验研究表明 :为保证发射机的复合三阶差拍失真性能 ,入射光偏离TE模的角度应小于The predistortion linearization technique is usually used to suppress the composite triple beat distortion (CTB) in optical fiber amplitude modulated cable television (AM-CATV) externally modulated transmitters. The influence of the incident polarization state with TE mode and TM mode on the CTB performance in optical fiber AM-CATV externally modulated transmitters is analyzed by calculation and experiment. The theoretical analysis and calculation have shown that the TE mode is the best mode for performance of CTB suppression. The influence of the incident polarization state drifting off TE mode is also analyzed and measured, and it is shown that the deviation angle from the TE mode should be less than 15 degree so as to the performance for CTB suppression will not be degraded.

关 键 词：光纤有线电视外调制发射机 复合三阶差拍失真 非线性补偿 偏振 

分 类 号：TN943.5[电子电信—信号与信息处理] TN949.194[电子电信—信息与通信工程]