Optical multipath self-interference cancellation for a wideband in-band full-duplex system using a silicon photonic modulator chip  

作　　者：Xiao Yu Jia Ye Lianshan Yan Tao Zhou Yue Zhu Peng Li Xihua Zou Wei Pan 余骁;叶佳;闫连山;周涛;朱越;李鹏;邹喜华;潘炜(Center for Information Photonics and Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China;Key Laboratory of Electronic Information Control,Southwest China Research Institute of Electronic Equipment,Chengdu 610029,China;Microwave Photonics Research Laboratory,School of Electrical Engineering and Computer Science,University of Ottawa,Ottawa,ONK1N6N5,Canada)

机构地区：[1]Center for Information Photonics and Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China [2]Key Laboratory of Electronic Information Control,Southwest China Research Institute of Electronic Equipment,Chengdu 610029,China [3]Microwave Photonics Research Laboratory,School of Electrical Engineering and Computer Science,University of Ottawa,Ottawa,ONK1N6N5,Canada

出　　处：《Chinese Optics Letters》2024年第7期126-131,共6页中国光学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFB2802701);the National Natural Science Foundation of China(Nos.U23A20376,62075185,and 62271422);the Sichuan Science Fund for Distinguished Young Scholars(No.24NSFJQ0195).

摘　　要：We propose and experimentally demonstrate a photonic method for wideband multipath self-interference cancellation using a silicon photonic modulator chip.The chip generates phase-inverted reference signals by leveraging the opposite phase between optical sidebands.Effectively managing amplitude and phase imbalances between self-interference and reference signals,the approach rectifies discrepancies through consistent chip manufacturing and packaging processes.Employing photonic multi-dimensional multiplexing,including wavelength and polarization,enables the acquisition of multiple reference signals.Experimental results show multipath cancellation depths of 25.53 dB and 23.81 dB for bandwidths of 500 MHz and 1 GHz,achieved by superimposing 2-path reference signals.

关 键 词：microwave photonics multipath self-interference silicon photonics 

分 类 号：TN25[电子电信—物理电子学] TN40