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

作     者：余骁 叶佳 闫连山 周涛 朱越 李鹏 邹喜华 潘炜 

作者机构：Center for Information Photonics and Communications School of Information Science and Technology Southwest Jiaotong University Key Laboratory of Electronic Information Control Southwest China Research Institute of Electronic Equipment Microwave Photonics Research Laboratory School of Electrical Engineering and Computer Science University of Ottawa 

出 版 物：《Chinese Optics Letters》 (中国光学快报(英文版))

年 卷 期：2024年第7期

页      面：131-136页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 070207[理学-光学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0702[理学-物理学] 

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 *** 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 of500 MHz and 1 GHz, achieved by superimposing 2-path reference signals.