一种基于调制相位的IQ调制器快速精确定标方法  

Rapid fine calibration method based on modulation phase for IQ modulator

作　　者：吕晋阳 周鹏威 何卓尔 LYU Jinyang;ZHOU Pengwei;HE Zhuoer(School of Optics and Electronic Technology,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学光学与电子科技学院,杭州310018

出　　处：《光通信技术》2022年第6期18-22,共5页Optical Communication Technology

基　　金：国家自然科学基金项目(62075202)资助;浙江省自然科学基金项目(LY20F050008)资助;浙江省属高校基本科研业务费专项资金资助。

摘　　要：正交(IQ)调制器在传统定标方法中存在定标速度慢和数据复杂难处理的问题,在一些实际应用场合无法提供相互正交且幅值为2倍半波电压的射频信号。为了解决上述问题,提出一种基于调制相位的IQ调制器快速精确定标方法,在不加射频条件下实现对IQ调制器偏置电压的快速精确定标。测试结果表明:该方法能在45 s左右完成对IQ调制器的定标,且定标精度较高,分辨率为10 m V;能直接控制IQ调制器生成抑制载波的单边带信号。In the traditional calibration method,the in-phase quadrature(IQ) modulator has the problems of slow calibration speed and the data is complex and difficult to process.In some practical applications,it is impossible to provide quadrature radio frequency signals with an amplitude of twice the half-wave voltage.In order to solve these problems,a rapid fine calibration method based on modulation phase for IQ modulator is proposed,which can achieve fast and accurate calibration of IQ modulator bias voltage without adding radio frequency.The test results show that this method can complete the calibration of IQ modulator in about 45 s,and the calibration accuracy is high,and the resolution is 10 m V.The IQ modulator can be directly controlled to generate single sideband signal with suppressed carrier.

关 键 词：光载无线 正交调制器 偏置电压 定标方法 相位调制 

分 类 号：TN929.11[电子电信—通信与信息系统]