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21st International Conference on Optical communications and networks, ICOCN 2023

作者： Zhu, Baolong Huang, Shuailuo Yang, Yu Long, Chengbin Cheng, Zhangyuan He, Yongqi Li, Juhao Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing100871 China

Performance between core and cladding pump schemes are simulatively compared based on weakly-coupled 7-core-single-mode and 7-core-3-mode EDFs. The results show that the two schemes have significant performance differ... 详细信息

ISBN: (纸本)9798350343502

关键词： Erbium doped fiber amplifiers

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Digital-Analog Mobile Fronthaul with Efficient SNR Scaling

Digital-Analog Mobile Fronthaul with Efficient SNR Scaling

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2024 Signal Processing in Photonic communications, SPPCom 2024

作者： Zhu, Yixiao Zhang, Chenbo Fang, Xiansong Xu, Yicheng Zhang, Ziheng Zhang, Fan Zhuge, Qunbi Xie, Xiaopeng Hu, Weisheng State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai200240 China State Key Laboratory of Advanced Optical Communication System and Networks Peking University Beijing100871 China

We overview the principle of hybrid digital-analog radio-over-fiber technique for high-fidelity and high spectral efficiency mobile fronthaul. The SNR scaling law is theoretically derived and compared with the existin... 详细信息

关键词： Radio-over-fiber

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Breaking the Limitation Between Ranging/Velocity Resolution and Voxel Rate by Coherent Stitching in a Dual-comb Lidar

Breaking the Limitation Between Ranging/Velocity Resolution ...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Cao, Xianyi Wang, Long Li, Tianyi Cai, Minglu Wu, Guiling Chen, Jianping Wu, Kan State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai China

We propose a coherent stitching method by exploring the coherence in different beat notes in a dual-comb Lidar. An equivalent sweeping bandwidth of 70 GHz and a voxel rate of 100 kHz are achieved. © Optica Publis... 详细信息

ISBN: (纸本)9781957171395

关键词： Optical radar

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Brillouin random lasing resonance enabled fast light and superluminal propagation in optical fibers

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Optics Express 2025年第11期33卷 22497-22510页

作者： Xie, Haoran Xiao, Zhelan Liu, Zhiming Sheng, Liwen Zhan, Li Pang, Fufei Zhang, Liang Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai200444 China Ceyear Technologies Co. Ltd. Qingdao266555 China Shandong Electronic Test & Measurement Technology Innovation Center Qingdao266555 China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China

We proposed and demonstrated fast light and superluminal propagation based on Rayleigh scattering-induced Brillouin random lasing resonance in optical fibers. A theoretical model of the proposed Brillouin superluminal propagation system has been established, detailing the principle of optical group velocity manipulation based on the combination of stimulated Brillouin scattering and Brillouin cross-gain modulation, for the first time to the best of our knowledge. Thanks to the randomly distributed Rayleigh scattering, Brillouin random lasing resonance with a single-longitudinal-mode lasing operation essentially contributes to fast light and superluminal propagation of the pump light signals propagating along a kilometer-long optical fiber. The temporal advancement, group velocity, and group index of sinusoidally modulated pump signals are thoroughly compared in experiments, which agree well with simulations. The dependence of the Brillouin gain fibers on the group velocity as well as the impact of Stokes power under different signal modulation frequencies on the broadening factor are systematically discussed and characterized. Furthermore, the Brillouin random lasing fast-light system is developed to offer a unique time-domain analysis solution for high-sensitivity fiber Bragg grating (FBG) temperature sensing scheme. Scalable sensitivity of the proposed sensing system can be achieved by applying different modulation frequencies. These findings may find wide potential applications in optical signal processing and hyper-sensitive detection. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Stimulated Brillouin scattering

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Dispersion-Diverse Receiver for Power Fading Mitigation in IM-DD systems at C Band

Dispersion-Diverse Receiver for Power Fading Mitigation in I...

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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： Zhang, Jianyao Zhu, Yixiao Fang, Xiansong Hu, Yimin Zhang, Yikun Zhang, Fan Hu, Weisheng 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 Peking University Beijing China Pengcheng Laboratory Shenzhen China

We experimentally demonstrate a dispersion-diverse receiver to mitigate the CD-induced power fading for IM-DD systems at C-band. The receiver can support 256.5 Gb/s line-rate PS-64-QAM signal transmission over 10-km S... 详细信息

ISBN: (纸本)9798350379266

关键词： Quadrature amplitude modulation

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Optical Fiber Time Transfer Monitoring and Management System 8th

Optical Fiber Time Transfer Monitoring and Management System

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8th International Conference on Computing, Control and Industrial Engineering, CCIE 2024

作者： Li, Tianyuan Xie, Kunfeng Yang, Yansong Hu, Liang Chen, Jianping Wu, Guiling State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9789819769360

In the paper, we design a monitoring and management system (MMS) for optical fiber time transfer (OFTT) based on manager/agent model. The proposed system includes monitoring and management server (MM-Server), monitoring and management unit (MMU) on OFTT device, and the communication interfaces interconnecting these entities. Utilizing B/S architecture and the Model-View-Controller design pattern, the MM-Server effectively segregates data, service logic, and the user interface, thereby improving the system’s scalability. The scalable and persistent OFTT-MMS has been tested on a bidirectional time-division multiplexing same-fiber same-wavelength OFTT system. The results indicate that the OFTT-MMS are capable to acquire real-time operational status of the time transfer devices and links, identify and handle faults, as well as realize remote configuration and visual monitoring of system performance, which can effectively improve the reliability, security, and availability of the OFTT system. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Optical fibers

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Breaking the Limitation Between Ranging/Velocity Resolution and Voxel Rate by Coherent Stitching in a Dual-comb Lidar

Breaking the Limitation Between Ranging/Velocity Resolution ...

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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

关键词： Optical fibers

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One-bit quantization is good for programmable coding metasurfaces

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Science China(Information Sciences) 2022年第7期65卷 225-239页

作者： Ya SHUANG Hanting ZHAO Menglin WEI Qiang CHENG Shi JIN Tiejun CUI Philipp DEL HOUGNE Lianlin LI State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsPeking University Institute of Electromagnetic Space Southeast University State Key Laboratory of Millimeter Waves Southeast University Pazhou Laboratory University of Rennes

The information-carrying programmable metasurfaces have found widespread applications in communication, sensing, and other related areas. However, there is a fundamental but unresolved problem,i.e., the rigorous understanding of the quantization of metasurface coding. Here, we theoretically investigate the performance difference between one-bit and continuous information-encoding metasurfaces. To this end,we derive analytical representations of system responses in various cases(single-input single-output, singleinput multiple-output, and multiple-input multiple-output). We analyze the impact of one-bit coding(in contrast to continuous coding) in terms of the resulting channel cross-talk and reduction of information capacity in various representative scenarios from wireless communication and holography. Our main finding indicates that the one-bit coding yields a satisfactory performance in most practical scenarios; we also show that in many cases there are smart ways to mildly relax optimization constraints in order to reduce the performance gap between the one-bit and continuous coding. We expect that our results can provide theoretical guidance for a large variety of metasurface-assisted information systems for electromagnetic waves and other wave phenomena.

关键词： metasurfaces metamaterials information capacity signal representation one-bit coding meta-surface

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Neural Channel Model-Aided Distributed Dispersion Manage Optimization for Mitigation of Nonlinearities and Dispersion in Fibre Transmission

Neural Channel Model-Aided Distributed Dispersion Manage Opt...

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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： Zeng, Chuyan Niu, Zekun Yang, Hang Shi, Minghui Hu, Weisheng Yi, Lilin State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai China

A distributed dispersion manage system is proposed for mitigating fibre nonlinearities and dispersion in fibre transmission through optimizing accumulated chromatic dispersion (aCD) distribution. 0.7 dB OSNR improveme... 详细信息

ISBN: (纸本)9798350379266

关键词： Chromatic dispersion

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Electromagnetic metamaterial agent

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Light(Science & Applications) 2025年第1期14卷 118-130页

作者： Shengguo Hu Mingyi Li Jiawen Xu Hongrui Zhang Shanghang Zhang Tie Jun Cui Philipp del Hougne Lianlin Li State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing100871China National Key Laboratory for Multimedia Information Processing School of Computer SciencePeking UniversityBeijing100871China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing210096China Pazhou Laboratory(Huangpu) GuangzhouGuangdong510555China Univ Rennes CNRSIETR-UMR 6164F-35000RennesFrance

Metamaterials have revolutionized wave control;in the last two decades,they evolved from passive devices via programmable devices to sensor-endowed self-adaptive devices realizing a user-specified *** deep-learning techniques play an increasingly important role in metamaterial inverse design,measurement post-processing and end-to-end optimization,their role is ultimately still limited to approximating specific mathematical relations;the metamaterial is still limited to serving as proxy of a human operator,realizing a predefined ***,we propose and experimentally prototype a paradigm shift toward a metamaterial agent(coined metaAgent)endowed with reasoning and cognitive capabilities enabling the autonomous planning and successful execution of diverse long-horizon tasks,including electromagnetic(EM)field manipulations and interactions with robots and *** recently released foundation models,metaAgent reasons in high-level natural language,acting upon diverse prompts from an evolving complex ***,metaAgent's cerebrum performs high-level task planning in natural language via a multi-agent discussion mechanism,where agents are domain experts in sensing,planning,grounding,and *** response to live environmental feedback within a real-world setting emulating an ambient-assisted living context(including human requests in natural language),our metaAgent prototype self-organizes a hierarchy of EM manipulation tasks in conjunction with commanding a *** masters foundational EM manipulation skills related to wireless communications and sensing,and it memorizes and learns from past experience based on human feedback.

关键词： agent prompt reasoning

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