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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Tonghui Ji Qi Wu Zhaopeng Xu Honglin Ji Yu Yang Lulu Liu Shangcheng Wang Zhongliang Sun Junpeng Liang Linsheng Fan Jianwei Tang Jinlong Wei Juhao Li Weisheng Hu Pengcheng Laboratory Shenzhen China State Key Lab of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication Systems & Networks Peking University Beijing China

We propose a fast and accurate estimation method of MDL-induced SNR penalty with non-uniform noise loading in SDM link. The proposed approach substantially saves the time cost while maintaining an estimation error wit... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： optical losses Costs Accuracy Simulation Loading Propagation losses optical fiber communication Numerical models Signal to noise ratio Photonics

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Multi-Task Learning: Towards Low-Complexity Neural Network Nonlinearity Compensation in Coherent optical systems

Multi-Task Learning: Towards Low-Complexity Neural Network N...

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Asia communications and Photonics Conference and Exhibition (ACP)

We propose multi-task learning based NN equalization for nonlinearity compensation in coherent optical system. Compared with conventional NN equalization, 30% complexity reduction is achieved in an 800-Gb/s PDM-16QAM ... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Q-factor Equalizers Symbols Artificial neural networks optical computing optical fiber networks Multitasking Real-time systems Complexity theory Photonics

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Nanoseconds CDR Enabled by Clock Distribution and Protection Sequence Insertion in optical

Nanoseconds CDR Enabled by Clock Distribution and Protection...

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2023 Opto-Electronics and communications Conference, OECC 2023

作者： Zhao, Yisong Yang, Changsheng Dang, Daohang Guo, Yuanzhi Shen, Shikui Wen, Ran Chen, Bin Guo, Bingli Yang, Chuanchuan Hua, Nan Xue, Xuwei Huang, Shanguo Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical Communications Beijing China China Unicom Research Institute Beijing China Hefei University of Technology School of Computer Science and Information Engineering Hefei China Peking University The State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing China Beijing China

The scheme combining clock distribution and protection sequence insertion from the network perspective is proposed and experimentally investigated to implement a 3.1 nanoseconds clock and data recovery in optical swit... 详细信息

ISBN: (纸本)9781665462136

关键词： optical switches

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optical coherent dot-product chip for sophisticated deep learning regression

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Light(Science & Applications) 2021年第12期10卷 2330-2341页

作者： Shaofu Xu Jing Wang Haowen Shu Zhike Zhang Sicheng Yi Bowen Bai Xingjun Wang Jianguo Liu Weiwen Zou State Key Laboratory of Advanced Optical Communication Systems and Networks Intelligent Microwave Lightwave Integration Innovation Center(imLic)Department of Electronic EngineeringShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China State Key Laboratory of Advanced Optical Communications System and Networks Department of ElectronicsSchool of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China Institution of Semiconductors Chinese Academy of SciencesBeijing 100083China

optical implementations of neural networks(ONNs)herald the next-generation high-speed and energy-efficient deep learning computing by harnessing the technical advantages of large bandwidth and high parallelism of ***,due to the problems of the incomplete numerical domain,limited hardware scale,or inadequate numerical accuracy,the majority of existing ONNs were studied for basic classification *** that regression is a fundamental form of deep learning and accounts for a large part of current artificial intelligence applications,it is necessary to master deep learning regression for further development and deployment of ***,we demonstrate a silicon-based optical coherent dot-product chip(OCDC)capable of completing deep learning regression *** OCDC adopts optical fields to carry out operations in the complete real-value domain instead of in only the positive *** reusing,a single chip conducts matrix multiplications and convolutions in neural networks of any ***,hardware deviations are compensated via in-situ backpropagation control provided the simplicity of chip ***,the OCDC meets the requirements for sophisticated regression tasks and we successfully demonstrate a representative neural network,the AUTOMAP(a cutting-edge neural network model for image reconstruction).The quality of reconstructed images by the OCDC and a 32-bit digital computer is *** the best of our knowledge,there is no precedent of performing such state-of-the-art regression tasks on ONN *** is anticipated that the OCDC can promote the novel accomplishment of ONNs in modern AI applications including autonomous driving,natural language processing,and scientific study.

关键词： neural hardware coherent

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Broadband optically Transparent Absorber and Multi-Band Stealth Based on Organic Metasurface

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Chinese Physics Letters 2025年第5期42卷 93-99页

作者： Chuwen Lan Yutong Gao Zehua Gao Hongye Wang Ke Bi Ming Lei Guoan Zhao School of Information and Communication Engineering Beijing Laboratory of Advanced Information NetworksBeijing Key Laboratory of Network System Architecture and ConvergenceBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China School of Integrated Circuits Beijing University of Posts and TelecommunicationsBeijing 100876China Network Education College of Beijing University of Posts and Telecommunications Beijing 100876China

optically transparent microwave absorbers and multi-band stealth have extensive potential applications in military defense and wireless communication fields, and thus have attracted considerable attention. So far,most related work is based on inorganic transparent conductive metasurfaces. In this paper, we proposed and experimentally demonstrated a flexible, broadband and optically transparent microwave absorber using an organic metasurface. The metasurface absorber is composed of a sandwich structure, in which electric resonances and magnetic resonances are induced resulting in broadband absorption. A spraying process was developed to prepare this metasurface absorber. Both simulations and experiment show that this metasurface has broadband microwave absorption and good optical transparency. We further found that by using a multi-layer structure, visible, radar,and infrared stealth(multi-band stealth) can be achieved simultaneously. With the advantages of excellent foldability and low cost, the proposed metasurfaces may have applications in military and wireless communication fields.

关键词： microwave absorber broadband microwave absorption organic metasurface metasurface absorber microwave absorbers inorganic transparent conductive metasurfaces military defense sandwich structure

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OFDR system with broadened frequency sweep range assisted by dual electro-optic frequency comb 27

OFDR system with broadened frequency sweep range assisted by...

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27th International Conference on optical Fiber Sensors, OFS 2022

作者： Zhu, Yidai Fan, Xinyu Zhang, Zhaopeng Yuan, Zhengchao Xu, Bingxin He, Zuyuan State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai200240 China Peng Cheng Laboratory Guangdong Shenzhen518055 China

We propose an OFDR system with the assistance of dual electro-optic frequency comb (EOFC). Rayleigh backscattering signals collected by multiple comb lines are synthesized to broaden the frequency sweep range for the ... 详细信息

ISBN: (纸本)9781957171142

关键词： Effective refractive index Frequency combs optical amplification optical amplifiers Spatial resolution Swept sources

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1-Pb/s CPRI-Equivalent Rate Coherent DA-RoF Fronthaul with 1024-QAM Scalable in Capacity, Reach, and Linewidth Using Residual Carrier-Based Phase Tracking

1-Pb/s CPRI-Equivalent Rate Coherent DA-RoF Fronthaul with 1...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Yixiao Zhu Xiansong Fang Chenbo Zhang Jingjing Lin Yicheng Xu Weiwei Hu Zhangyuan Chen Qunbi Zhuge Fan Zhang Xiaopeng Xie Weisheng Hu State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory o_f Advanced Optical Communication System and Networks Peking University Beijing China

We demonstrate 1.0-Pb/s CPRI-equivalent rate fronthaul with 1024-QAM by using digital-analog radio-over-fiber and coherent detection based on modulator bias-induced residual carrier for phase tracking. The reach is extended to 20-km SSMF with 4096-QAM and 80-km with 256-QAM, and laser linewidth can be relaxed to 3MHz.

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Adjustable MMI for dynamic on-chip monitoring based on nano-optoelectro-mechanical interaction 3

Adjustable MMI for dynamic on-chip monitoring based on nano-...

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3rd International Conference on Laser, Optics, and Optoelectronic Technology, LOPET 2023

作者： Zhang, Feng Zhu, Kejian Sun, Pengfei Li, Tuo Zou, Xiaofeng Liu, Kai Man, Hongtao Song, Qi Zhou, Lang Li, Chen Inspur Electronic Information Industry Co. Ltd. Beijing100085 China State Key Laboratory of High-end Server&Storage Technology Jinan250013 China State Key Laboratory of Advanced Optical Communications Systems and Networks School of Electronics Peking University Beijing100871 China

ISBN: (纸本)9781510667624

Energy efficiency and integration scale are two of the major challenges of current optical computing chips. To solve these problems, we propose for the first time a special multimode interference(MMI) and dynamic monitoring idea. The research of the device is based on finite element analysis. There is a nano-opto-electro-mechanical(NOEM) ratio controller in the upper left of the multimode waveguide. Most of the time, the device is in static mode with power-splitting-ratio(PSR) close to 0:100. The research shows that once the controller is started, the device enters dynamic mode with a PSR bigger than 5:95. The PSR is less than 0.36:99.64 in a selected static mode and up to 8.35:91.65 in dynamic mode. The change of PSR in dynamic mode is realized by adjusting distance between NOEM module and multimode waveguide. The footprint of the multimode waveguide is only 1.54×3.63μm2. Its minimum insertion loss(IL) is less than 0.2dB and has good process tolerance characteristics. The energy consumption of discontinuous monitoring based on the MMI is significantly lower than that of continuous monitoring. It is estimated that when duty cycle of the periodic monitoring module is 0.1 and 0.01, its monitoring energy consumption can be reduced by 70% and 97%, respectively. The MMI is expected to greatly promote the development of optical computing chips. © 2023 SPIE.

关键词： Energy efficiency

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Missing Data Prediction Using LSTM for Radio Frequency Transfer system

Missing Data Prediction Using LSTM for Radio Frequency Trans...

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2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2023

作者： Cheng, Jiahui Gao, Hao Liu, Chenxia Zhao, Zhuoze Qiao, Yaojun Luo, Bin Yu, Song Guo, Hong Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical Communications Beijing100876 China North China Electric Power University Department of Electronic and Communication Engineering Baoding071066 China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Center for Quantum Information Technology Beijing100871 China

ISBN: (纸本)9798350311426

Missing data affects stability analysis of Radio Frequency (RF) transfer system. In this paper, a missing data prediction method using Long Short-Term Memory (LSTM) network is proposed for the short-term failure in RF transfer system. The performance is verified by experimenting on the measurement data of 2.4 GHz RF transfer system using 3000 km single optical fiber bi-directionally. The results demonstrate that our proposed method can achieve higher prediction accuracy compared to back propagation neural network (BPNN) and Support Vector Regression (SVR). When the prediction time is 240 s, the Root Mean Squared Error (RMSE) between the predicted value and the actual value is less than 0.001. This provides an effective and feasible method to impute missing data for RF transfer system. © 2023 IEEE.

关键词： frequency transfer Long Short-Term Memory network missing data prediction

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Integrated Parallel Chaos driven LiDAR system with High Interference Tolerance

Integrated Parallel Chaos driven LiDAR System with High Inte...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Chen, Ruixuan Shen, Bitao Shu, Haowen Chang, Lin Xie, Weiqiang Liao, Wenchao Tao, Zihan Bowers, John Wang, Xingjun State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States Frontiers Science Center for Nano-Optoelectronics Peking University Beijing100871 China

We introduce a chaotic microcomb based high interference-tolerance parallel LiDAR. Parallel chaos with record-high noise spectra beyond 7 GHz leads to sub-cm-level ranging accuracy. The intrinsic orthogonality permits... 详细信息

ISBN: (纸本)9781957171258

关键词： optical radar

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