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Multilevel Polar-Coded PAM-8 with MSB Shaping over Turbulent FSO communication Link

Multilevel Polar-Coded PAM-8 with MSB Shaping over Turbulent...

2023 Asia communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Yang, Weiying Liu, Xiaoyu Liu, Zhiyang Xiao, Shilin Shanghai Jiao Tong University The State Key Laboratory of Advanced Optical Communication System and Networks Shanghai200240 China

ISBN: (纸本)9798350312614

Thanks to the flexibility and adaptability of polar codes, a Free-space optical (FSO) communication scheme combining it with probabilistic shaping (PS) and pulse amplitude modulation (PAM) is proposed to achieve capacity improvement in atmospheric turbulence (AT) channels. The proposed scheme generates a non-uniform probability distribution PAM-8 transmission symbol by a multilevel polar-coded modulation (MLPC) method equipped with the most significant bit (MSB) level shaping precoder. Under the selected turbulence conditions, it provides up to 1.09dB theoretical shaping gain of capacity at the specified information rate (AIR) of 1.859 bit/channel use and 0.82dB performance gain in block error rate. © 2023 IEEE.

关键词： FSO Multilevel Coding PAM8 Probabilistic Shaping Turbulence Channel

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Integrated Distributed Sensing and Quantum communication networks

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Research 2025年第1期2024卷 899-914页

作者： Yuehan Xu Tao Wang Peng Huang Guihua Zeng State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Sensing and Information ProcessingShanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Center for Quantum Sciences Shanghai 201315China Hefei National Laboratory Hefei 230088China

The integration of sensing and communication can achieve ubiquitous sensing while enabling ubiquitous *** the gradually improving global communication,the integrated sensing and communication system based on optical fibers can accomplish various functionalities,such as urban structure imaging,seismic wave detection,and pipeline safety *** the development of quantum communication,quantum networks based on optical fiber are gradually being *** this paper,we propose an integrated sensing and quantum network(ISAQN)scheme,which can achieve secure key distribution among multiple nodes and distributed sensing under the standard quantum *** continuous variables quantum key distribution protocol and the round-trip multiband structure are adopted to achieve the multinode secure key ***,the spectrum phase monitoring protocol is proposed to realize distributed *** determines which node is vibrating by monitoring the frequency spectrum and restores the vibration waveform by monitoring the phase *** scheme is experimentally demonstrated by simulating the vibration in a star structure *** results indicate that this multiuser quantum network can achieve a secret key rate of approximately 0.7 Mbits/s for each user under 10-km standard fiber transmission,and its network capacity is *** terms of distributed sensing,it can achieve a vibration response bandwidth ranging from 1 Hz to 2 kHz,a strain resolution of 0.50 nε/Hz,and a spatial resolution of 0.20 m under shot-noise-limited *** proposed ISAQN scheme enables simultaneous quantum communication and distributed sensing in a multipoint network,laying a foundation for future large-scale quantum networks and high-precision sensing networks.

关键词： integrated sensing quantum networks ubiquitous sensing pipeline safety monitoringwith ubiquitous communicationwithin quantum communicationquantum networks

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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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Design of Large-Scale OXC for the Next-Generation ROADM 16

Design of Large-Scale OXC for the Next-Generation ROADM

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16th Pacific Rim Conference on Lasers and Electro-Optics, CLEO-PR 2024

作者： Ye, Tong Luo, Jiayi Li, Herui Yao, Yibei Shanghai Jiao Tong University State Key Lab of Advanced Optical Communication Systems and Networks Shanghai China

Using multiple MEMSes sandwiched between two columns of WSSes, this paper designs a low-loss, nonblocking, and scalable OXC that is suitable for the future SDM optical network with a smaller number of wavelengths per ... 详细信息

ISBN: (纸本)9798350372076

关键词： optical fiber communication

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Silicon photonic integrated interrogator for fiber-optic distributed acoustic sensing

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Photonics Research 2024年第3期12卷 465-473页

作者： ZHICHENG JIN JIAGENG CHEN YANMING CHANG QINGWEN LIU ZUYUAN HE State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Distributed acoustic sensing(DAS)technology has been a promising tool in various ***,the large size and relatively high cost of DAS equipment composed of discrete devices restrict its further popularization to some degree,and the photonic integration technology offers a potential *** this paper,we demonstrate an integrated interrogator for DAS on the silicon-on-insulator(SOI)*** design of the chip revolves around a Mach–Zehnder modulator(MZM)transmitter and a dual-quadrature and dualpolarization coherent *** integrated interrogator supports multiple DAS schemes,including the time-gated digital optical frequency domain reflectometry(TGD-OFDR),which is adopted for system performance evaluation.59■strain resolution in 12.1km sensing fiber with 1.14 m spatial resolution(SR)is ***,along 49.0 km sensing fiber,81■strain resolution with 3.78 m SR is *** results show that the integrated interrogator has comparable performance to the discrete DAS *** the best of our knowledge,this is the first dedicated on-chip DAS interrogator,which validates the effectiveness of the blend of photonics integration and DAS technology.

关键词： fiber polarization modulator

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Recent progress of photodetector based on carbon nanotube film and application in optoelectronic integration

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Nano Research Energy 2023年第2期2卷 182-199页

作者： Xiang Cai Sheng Wang Lian-Mao Peng Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-Based Electronics School of ElectronicsPeking UniversityBeijing 100871China State Key Laboratory of Advanced Optical Communication System and Networks School of ElectronicsPeking UniversityBeijing 100871China

Due to its remarkable electrical and optical capabilities,optoelectronic devices based on the semiconducting single-walled carbon nanotube(s-SWCNT)have been studied extensively in the last two ***,s-SWCNT is a direct bandgap semiconductor with a high infrared absorption coefficient and high electron/hole *** addition,as a typical one-dimensional material,there is no lattice mismatch between s-SWCNT and any *** advantage is that the optoelectronic devices of s-SWCNT can be processed at low temperatures.s-SWCNT has intriguing potential and applications in solar cells,light-emitting diodes(LEDs),photodetectors,and three-dimensional(3D)optoelectronic *** recent years,along with the advancement of solution purification technology,the high-purity s-SWCNTs film has laid the foundation for constructing large-area,homogenous,and high-performance optoelectronic *** this review,optoelectronic devices based on s-SWCNTs film and related topics are reviewed,including the preparation of high purity s-SWCNTs film,the progress of photodetectors based on the s-SWCNTs film,and challenges of s-SWCNTs film photodetectors.

关键词： carbon nanotube high purity semiconducting single-walled carbon nanotubes(s-SWCNTs)film photodetectors optoelectronic integration

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Integrated Distributed Acoustic Sensing Interrogator Based on Silicon Photonics 3

Integrated Distributed Acoustic Sensing Interrogator Based o...

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3rd EAGE Workshop on Fiber Optic Sensing for Energy Applications

作者： Chen, J. Chang, Y. Liu, Q. He, Z. State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic Engineering Shanghai Jiao Tong University China

ISBN: (纸本)9789462824836

Distributed acoustic sensing (DAS) is an important branch of fiber optic sensing, but there have been problems of size, weight, and cost that hinder its practical application. In order to solve these problems, photonic integration technology is an effective means. In this work, we have demonstrated a highly integrated DAS interrogator based on the silicon-on-insulator (SOI) platform. The DAS interrogator contains two parts, a transmitter based on a Mach-Zehnder modulator and a coherent receiver. In the demo experiment, with time-gated digital optical frequency domain reflectometry (TGD-OFDR) chosen as the testing DAS scheme, the strain resolution is about 77.0 pΕ/√Hz with the spatial resolution of 0.819 m along the total 12.2 km sensing fiber, which is comparable to the discrete system. To the best of our knowledge, this is the first integrated DAS interrogator, and achieves a high level of integration and excellent performance. The implementation of the integrated DAS system also demonstrates the integration possibilities of fiber optic sensing systems of other architectures, and that these integrated systems may achieve good performance. The integrated DAS heralds the possibility of making the application scenarios of DAS expand. With the development of silicon photonics technology, devices that are not integrated at this stage, such as lasers, can also be integrated, truly realizing the full integration of the system. © 2023 3rd EAGE Workshop on Fiber Optic Sensing for Energy Applications. All rights reserved.

关键词： Silicon photonics

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Net 8×250 Gbit/s/λ PAM6/8 optical Interconnect Over High-Density Eight-Core Fiber and Low-Crosstalk Laser Direct Writing FI/FO Devices

Net 8×250 Gbit/s/λ PAM6/8 Optical Interconnect Over High-D...

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2023 Asia communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Yang, Yu Xu, Zhaopeng Ji, Honglin Qiao, Gang Liu, Lulu Wang, Shangcheng Cheng, Ruiting Yu, Jinyi Yang, Chuanchuan He, Zhixue He, Yongqi Chen, Zhangyuan Hu, Weisheng Li, Juhao Peng Cheng Laboratory Shenzhen China Peking University State Key Lab of Advanced Optical Communication Systems and Networks Beijing China Shanghai Jiao Tong University State Key Lab of Advanced Optical Communication Systems and Networks Shanghai China

ISBN: (纸本)9798350312614

We experimentally demonstrate a net 8×250 Gbit/s/λ PAM6 and PAM8 transmission over 200-m standard-125μm-cladding high-density eight-core fiber and low-crosstalk femtosecond laser direct writing fan-in/fan-out devices. The proposed prototype system is promising for high-speed optical interconnection applications. © 2023 IEEE.

关键词： Fan-in/fan-out High-speed optical interconnects MCF SDM

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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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Up to 320-GBaud Coherent optical system Based on Broadband Segmented TFLN I/Q Modulator

Up to 320-GBaud Coherent Optical System Based on Broadband S...

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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： Zhou, Lingjun Fang, Xiansong Zhu, Yixiao Zhu, Junbo Li, Yunchen Nie, Xiaomin Zhou, Xian Yang, Chuanchuan Wang, Lei Hu, Weisheng Li, Ke He, Zhixue Zhang, Fan School of Electronic and Computer Engineering Peking University Shenzhen China Peng Cheng Laboratory Shenzhen China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Peking University Beijing China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China School of Computer & Communication Engineering University of Science and Technology Beijing Beijing China

We demonstrate the record 320-GBd single-polarization QPSK and 300-GBd dual-polarization QPSK signal generation and intradyne coherent detection. This result is achieved with a novel broadband segmented TFLN I/Q modul... 详细信息

ISBN: (纸本)9798350379266

关键词： Quadrature phase shift keying

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