摘要
为了延长信号传输距离、方便探测及降低噪声,并最大可能地保留信号能量,可通过移相法实现载波抑制单边带(SSB-CS)信号输出,采用导频法控制商用铌酸锂双平行(IQ)调制器可达到上述目标。实验结果表明:所提方法在2~18 GHz范围内,输出信号的载边比和边边比均大于20 dB;该方法能在不使用IQ调制器内置光电二极管(PD)的前提下,有效控制调制器工作状态,得到载边比和边边比均满足预期的SSB-CS信号。
In order to extend the signal transmission distance,facilitate the detection and noise reduction,and retain the signal energy as much as possible,the carrier suppressed single sideband(SSB-CS)signal output can be realized by phase shifting method.Using pilot method to control commercial lithium niobate double parallel(IQ)modulator can achieve the above goal.The experimental results show that the carrier to side ratio and side to side ratio of the output signal are greater than 20 dB in the range of 2-18 GHz.This method can effectively control the working state of the modulator without using the built-in photodiode(PD)of the IQ modulator,and the carrier side ratio and side side ratio can meet the expected SSB-CS signal.
作者
王侠
唐绍宇
韦慕野
汤科
伍颖
余志强
邓东锋
杨庆锐
李文甫
欧阳竑
何锋
WANG Xia;TANG Shaoyu;WEI Muye;TANG Ke;WU Ying;YU Zhiqiang;DENG Dongfeng;YANG Qingrui;LI Wenfu;OU-YANG Hong;HE Feng(The 34th Research Instiute of CETC,Guilin Guangxi 541004,China)
出处
《光通信技术》
2021年第4期27-31,共5页
Optical Communication Technology
关键词
双平行调制器
载波抑制单边带
移相法
导频信号
偏置点
double parallel modulator
carrier suppressed single sideband
phase shifting method
pilot tone
bias point
