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2022 Conference on Lasers and Electro-Optics Pacific Rim, CLEO/PR 2022

作者： Zhu, Yixiao Hu, Weisheng State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai200240 China

We propose a generalized carrier assisted differential detection receiver featuring simplest structure of 2×2 optical coupler and 2 single-ended photodiodes. The performance of the designed receiver is comprehens... 详细信息

关键词： Electronics industry

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Comparison of Nonlinear Equalizers in C-Band DML-DD Link for 1024-QAM Digital-Analog Radio-over-Fiber Transmission 49

Comparison of Nonlinear Equalizers in C-Band DML-DD Link for...

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49th European Conference on optical communications, ECOC 2023

作者： Zhang, Yikun Zhu, Yixiao Yan, Zijun Hu, Yimin Xu, Yicheng Zhuge, Qunbi Hu, Weisheng State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai200240 China

ISBN: (纸本)9781839539954

We experimentally demonstrate 12-GHz 1024-QAM OFDM signal transmission using digitalanalog radio-over-fiber in C-band DML-DD link under chirp-dispersion interaction. Volterra-based nonlinear and piecewise linear equalizers obtain 4.5-dB and 3.5-dB SNR improvement in strong nonlinear region, while low-complexity composite second-order cancellation is accurate in moderate nonlinear region. © The Institution of Engineering & Technology 2023.

关键词： Radio transmission

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Spectrally Efficient Faster-Than-Nyquist Dual-Band Transmission Enabled by Inter-Subcarrier Crosstalk Cancellation 22

Spectrally Efficient Faster-Than-Nyquist Dual-Band Transmiss...

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22nd International Conference on optical communications and networks, ICOCN 2024

作者： Man, Lina Zhu, Yixiao Zhang, Ziheng Yang, Guangying Zhang, Yikun Zhuge, Qunbi Hu, Weisheng Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication System and Networks Shanghai200240 China

We propose and experimentally demonstrate an inter-subcarrier crosstalk cancellation algorithm for fasterthan-Nyquist transmission. At 20% HD-FEC threshold, the achievable faster-than-Nyquist rate improves from 0.875 ... 详细信息

ISBN: (纸本)9798350367652

关键词： Crosstalk

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Recent Progress in Coherent Pulse Combination Technologies

Recent Progress in Coherent Pulse Combination Technologies

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2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020

作者： Zhang, Zhigang Peking University State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronics Beijing100871 China

ISBN: (纸本)9780646825045

关键词： Femtosecond lasers Femtosecond pulses Fiber optic amplifiers High power fiber amplifiers Oscillators

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1.3-μm 4×25-Gb/s hybrid integrated TOSA and ROSA

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Frontiers of Information Technology & Electronic Engineering 2019年第4期20卷 490-497页

作者： Yu LIU Hao-tian BAO Yi-ming ZHANG Zhi-ke ZHANG Yun-shan ZHANG Xiang-fei CHEN Jun LU Yue-chun SHI Jia-shun ZHANG Liang-liang WANG Jun-ming AN Ning-hua ZHU State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Engineering and Computer Science Peking University Microwave-Photonics Technology Laboratory College of Engineering and Applied Sciences Nanjing University

The design and fabrication of a compact and low-cost 4×25-Gb/s transmitter optical sub-assembly(TOSA) and receiver optical sub-assembly(ROSA) using a hybrid integrated technique are reported. TOSA and ROSA are developed without thermoelectric cooler for coarse wavelength division multiplexing applications. Physical dimension of the packaged optical subassembly is limited to 11.5 mm×5.4 mm×5.4 mm. The design of TOSA and ROSA is employed using a silica-based arrayed waveguide grating chip to select the specific channel wavelength at O-band. In TOSA, the wavelength of four 1.3-μm discrete directly modulated laser chips is well controlled based on the reconstruction equivalent chirp technique. In the back-to-back transmission test, bit error rates for all lanes of cascade of the TOSA and ROSA are small. A clear opening eye diagram is obtained.

关键词： Reconstruction equivalent chirp Arrayed waveguide grating Transmitter optical subassembly Hybrid integrated

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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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Single-Wavelength 1.9-Tb/s Direct Detection Using TFLN DDMZM and optical Hilbert Receiver

Single-Wavelength 1.9-Tb/s Direct Detection Using TFLN DDMZM...

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2024 Asia communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and optical communications, IPOC 2024

作者： Zhu, Yixiao Fang, Xiansong Zhou, Lingjun Zhu, Junbo Li, Yunchen Zhou, Xian Zhong, Kangping Lau, Alan Pak Tao He, Zhixue Wang, Lei Hu, Weisheng Li, Ke Zhang, Fan Pengcheng Laboratory Shenzhen China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Peking University Beijing China University of Science and Technology Beijing Beijing China Photonics Research Institute Department of Electrical and Electronic Engineering The Hong Kong Polytechnic University Hong Kong State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication System and Networks Peking University Beijing China

ISBN: (纸本)9798350379266

We propose an optical Hilbert direct detection receiver with an all-pass transfer function for carrier-assisted complex-valued double-sideband signal reception. We experimentally demonstrate single-wavelength line rates at 1.94 Tb/s at 300-m SSMF and 1.84 Tb/s at 10-km SSMF using a >100-GHz thin-film LiNbO3 dual-drive Mach-Zehnder modulator. © 2024 IEEE.

关键词： optical transfer function

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Dual-layer efficiency enhancement for future passive optical network

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Science China(Information Sciences) 2016年第2期59卷 172-184页

作者： Yuefeng JI Xiaoxiong WANG Shizong ZHANG Rentao GU Tonglu GUO Zhaozhi GE State Key Lab of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications

Ever-increasing demands on bandwidth compel us to improve the bandwidth utilization of access networks. It is more important to enhance the efficiency of passive optical networks(PON) than other access technologies, as they are the primary solutions to various access scenarios. To satisfy the demands of improved bandwidth efficiency, we propose a dual-layer(data link layer and network layer) efficiency enhancement scheme for future PON system. Under this architecture, a data-link-layer flexible coding scheme is introduced to extend the downstream link throughput, and a network-layer centralized active queue management(AQM) scheme is introduced to increase bandwidth efficiency. Both of these technologies are designed to suit the future centralized cooperative control mode. The results of an experimental demonstration of the network coding PON scheme reveal the efficiency of the proposed architecture. The results of simulations show that the centralized AQM scheme has a positive influence on queuing delay and jitter. To the best of our knowledge, this is the first time that a data link layer mechanism and a network layer policy have been integrated to provide high efficiency and quality of service in access networks.

关键词： passive optical network bandwidth efficiency network coding active queue management centralized control

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Deep-learning-powered photonic analogto-digital conversion

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Light(Science & Applications) 2019年第1期8卷 611-621页

作者： Shaofu Xu Xiuting Zou Bowen Ma Jianping Chen Lei Yu 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 University200240 ShanghaiChina

Analog-to-digital converters(ADCs)must be high speed,broadband,and accurate for the development of modern information systems,such as radar,imaging,and communications systems;photonic technologies are regarded as promising technologies for realizing these advanced ***,we present a deep-learning-powered photonic ADC architecture that simultaneously exploits the advantages of electronics and photonics and overcomes the bottlenecks of the two technologies,thereby overcoming the ADC tradeoff among speed,bandwidth,and *** supervised training,the adopted deep neural networks learn the patterns of photonic system defects and recover the distorted data,thereby maintaining the high quality of the electronic quantized data succinctly and *** numerical and experimental results demonstrate that the proposed architecture outperforms state-ofthe-art ADCs with developable high throughput;hence,deep learning performs well in photonic ADC *** anticipate that the proposed architecture will inspire future high-performance photonic ADC design and provide opportunities for substantial performance enhancement for the next-generation information systems.

关键词： thereby Deep overcome

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Decomposition-based learning in drone-assisted wireless-powered mobile edge computing networks

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Digital communications and networks 2024年第6期10卷 1769-1781页

作者： Xiaoyi Zhou Liang Huang Tong Ye Weiqiang Sun State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China College of Computer Science and Technology Zhejiang University of TechnologyHangzhou 310058China

This paper investigates the multi-Unmanned Aerial Vehicle(UAV)-assisted wireless-powered Mobile Edge Computing(MEC)system,where UAVs provide computation and powering services to mobile *** aim to maximize the number of completed computation tasks by jointly optimizing the offloading decisions of all terminals and the trajectory planning of all *** action space of the system is extremely large and grows exponentially with the number of *** this case,single-agent learning will require an overlarge neural network,resulting in insufficient ***,the offloading decisions and trajectory planning are two subproblems performed by different executants,providing an opportunity for *** thus adopt the idea of decomposition and propose a 2-Tiered Multi-agent Soft Actor-Critic(2T-MSAC)algorithm,decomposing a single neural network into multiple small-scale *** the first tier,a single agent is used for offloading decisions,and an online pretrained model based on imitation learning is specially designed to accelerate the training process of this *** the second tier,UAVs utilize multiple agents to plan their *** agent exerts its influence on the parameter update of other agents through actions and rewards,thereby achieving joint *** results demonstrate that the proposed algorithm can be applied to scenarios with various location distributions of terminals,outperforming existing benchmarks that perform well only in specific *** particular,2T-MSAC increases the number of completed tasks by 45.5%in the scenario with uneven terminal ***,the pretrained model based on imitation learning reduces the convergence time of 2T-MSAC by 58.2%.

关键词： Mobile-edge computing Multi-agent reinforcement learning Offloading decision Trajectory planning Unmanned aerial vehicle Wireless power transfer

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