Four-dimensional direct detection receiver enabling Jones-space field recovery with phase and polarization diversity  

作　　者：QI WU YIXIAO ZHU XUEYANG LI HEXUN JIANG CHEN CHENG MENGFAN FU YIKUN ZHANG QUNBI ZHUGE ZHAOHUI LI WEISHENG HU 

机构地区：[1]Peng Cheng Laboratory,Shenzhen 518055,China [2]State Key Laboratory of Advanced Communication Systems and Networks,Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [3]School of Electronics and Information Technology and Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems,Sun Yat-sen University,Guangzhou 510006,China

出　　处：《Photonics Research》2024年第3期399-410,共12页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2020YFB1806401);National Natural Science Foundation of China(62001287,62201308,62271305)。

摘　　要：Data centers,the engines of the global Internet,rely on powerful high-speed optical interconnects.In optical fiber communication,classic direct detection captures only the intensity of the optical field,while the coherent detection counterpart utilizes both phase and polarization diversities at the expense of requiring a narrow-linewidth and high-stability local oscillator(LO).Herein,we propose and demonstrate a four-dimensional Jones-space optical field recovery(4-D JSFR)scheme without an LO.The polarization-diverse full-field receiver structure captures information encoded in the intensity and phase of both polarizations,which can be subsequently extracted digitally.To our knowledge,our proposed receiver achieves the highest electrical spectral efficiency among existing direct detection systems and potentially provides similar electrical spectral efficiency as standard intradyne coherent detection systems.The fully recovered optical field extends the transmission distance beyond the limitations imposed by fiber chromatic dispersion.Moreover,the LO-free advantage makes 4-D JSFR suitable for photonic integration,offering a spectrally efficient and cost-effective solution for massively parallel data center interconnects.Our results may contribute to the ongoing developments in the theory of optical field recovery and the potential design considerations for future high-speed optical transceivers.

关 键 词：POLARIZATION RECEIVER PHASE 

分 类 号：TN929.11[电子电信—通信与信息系统]