On-chip photonic spatial-temporal descrambler  

作　　者：Wenkai Zhang Xueyi Jiang Wentao Gu Junwei Cheng Hailong Zhou Jianji Dong Dongmei Huang Xinliang Zhang 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [2]Optics Valley Laboratory,Wuhan 430074,China [3]The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518057,China [4]Photonics Research Institute,Department of Electrical Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China

出　　处：《Chip》2023年第2期1-7,共7页芯片（英文）

基　　金：National Key Research and Development Program of China(2021YFB2801903,2021YFB2801900);National Natural Science Foundation of China(62075075,U21A20511,62275088);Innovation Project of Optics Valley Laboratory(Grant No.OVL2021BG001).

摘　　要：As an indispensable part to compensate for the signal crosstalk in fiber communication systems,conventional digital multi-input multi-output(MIMO)signal processor is facing the challenges of high com-putational complexity,high power consumption and relatively low processing speed.The optical MIMOenables the best use of light and has been proposed to remedy this limitation.However,the currently existing optical MIMO methods are all restricted to the spatial di-mension,while the temporal dimension is neglected.Here,an on-chip spatial-temporal descrambler with four channels were devised and its MIMO functions were experimentally verified simultaneously in both spatial and temporal dimensions.The spatial crosstalk of single-channel descrambler and four-channel descrambler is respectively less than-21 dB and-18 dB,and the time delay is simultaneously com-pensated successfully.Moreover,a more universal model extended to mode-dependent loss and gain(MDL)compensation was further de-veloped,which is capable of being cascaded for the real optical trans-mission system.The first attempt at photonic spatial-temporal de-scrambler enriched the varieties of optical MIMO,and the proposed scheme provided a new opportunity for all-optical MIMO signal pro-cessing.

关 键 词：Optical signal processing Photonic integrated circuits Opti-cal MIMO Optical matrix computing 

分 类 号：TN43[电子电信—微电子学与固体电子学]