用IQ调制器产生载波抑制单边带信号的研究  

Research on Carrier Suppression Single Sideband Signal from IQ Modulator

作　　者：王侠[1] 韦慕野 邓东锋 何锋[1] 欧阳竑[1] 余志强[1] 伍颖 李文甫[1] 杨庆锐[1] 李鹏伟 WANG Xia;WEI Mu-ye;DENG Dong-feng;HE Feng;OUYANG Hong;YU Zhi-qiang;WU Ying;LI Wen-fu;YANG Qing-rui;LI Peng-wei(The 34th Research Institute of CETC,Guilin 541004,China)

机构地区：[1]中国电子科技集团公司第三十四研究所,桂林541004

出　　处：《光电技术应用》2021年第1期47-54,共8页Electro-Optic Technology Application

基　　金：桂林市科学研究与技术开发项目(20190201-1)资助。

摘　　要：载波抑制单边带调制是一种特殊的幅度调制形式,它将载波和另一个边带抑制,提高频带利用率,增加了光纤的传输容量。并可有效抑制色散,延长信号的传输距离。被广泛应用于长距离高频微波ROF系统中。文中详细分析了利用商用铌酸锂调制器产生载波抑制单边带信号的原理,并据此分析,搭建了试验系统,分别产生了±1阶(即长波方向和短波方向)的载波抑制单边带信号。Carrier suppressed single sideband(SSB)modulation is a special form of amplitude modulation,which can suppress the carrier and another side band to improve the frequency band utilization rate and increase the transmission capacity of optical fiber.The dispersion can be suppressed effectively and the transmission distance of the signal can be extended.So it is widely used in long distance high frequency microwave radio over fiber(ROF)system.The principle of using commercial LiNbO3 modulator to generate carrier suppressed SSB signals is analyzed in detail,and based on this,a testing system is built to generate carrier suppressed SSB signals of order±1 respectively,+1 for long wave direction and1 for short wave direction.

关 键 词：铌酸锂 相位调制器 马赫-曾德尔干涉仪型光强度调制器 IQ调制器(双平行调制器) 载波抑制单边带 

分 类 号：TP306.2[自动化与计算机技术—计算机系统结构]