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optical Fiber communication Conference, OFC 2020

作者： Zhang, Lei Yang, Fan Ruan, Xiaoke Li, Yanping Zhang, Fan State Key Laboratory of Advanced Optical Communication System and Networks Frontiers Science Center for Nano-optoelectronics Department of Electronics Peking University Beijing100871 China

We experimentally demonstrate ultra-high speed metro-scale optical transmission of SSB PAM-4 signal with a record single lane bit rate of 176Gb/s over 400km SSMF based on conventional silicon photonic dual-drive modul... 详细信息

ISBN: (数字)9781943580712

ISBN: (纸本)9781943580712

关键词： Pulse amplitude modulation

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Practical Source Security of On-chip Continuous Variable Measurement Device Independent Quantum key Distribution

Practical Source Security of On-chip Continuous Variable Mea...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Lang Li Tao Wang Peng Huang Yuehan Xu Xu Liu Huanxi Zhao Guihua Zeng State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China Institute of Quantum Sensing and Information Processing School of Sensing Science and Engineering Shanghai Jiao Tong University Shanghai China Shanghai Research Center for Quantum Sciences Hefei National Laboratory Shanghai China

ISBN: (数字)9798350375909

ISBN: (纸本)9798350375916

In the evolving field of Continuous Variable Quantum key Distribution (CV-QKD), notable for its synergistic potential with existing optical communication infrastructures, a high channel capacity, and an anticipated surge in secret rates, the Measurement Device Independent (MDI) framework stands as a bulwark against side-channel vulnerabilities at the measurement juncture [1] –[4]. Recent years have witnessed quantum photonics technology leapfrogging into a realm that promises the realization of fully integrated CV-MDI-QKD transmitter terminals, a cornerstone for large-scale CV-MDI-QKD networks. However, integrating high-efficiency on-chip light sources while effectively navigating the treacherous waters of practical security challenges remains a formidable task [5], [6]. This study is pioneering in its focus on the practical security intricacies stemming from imperfections in on-chip light sources within CV-MDI-QKD systems. We propose defense mechanisms tailored to shield against the risks associated with source defects, thereby laying a robust foundation for secure, reliable on-chip CV-MDI-QKD transmission terminals. This advancement is a critical enabler for the widespread adoption of CV-MDI-QKD, signaling a paradigm shift in secure communications.

关键词： optical variables measurement system-on-chip Quantum key distribution Security Reliability Task analysis Surges

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160-Gb/s nyquist PAM-4 transmission with GESI-EAM using artificial neural network based nonlinear equalization

160-Gb/s nyquist PAM-4 transmission with GESI-EAM using arti...

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optical Fiber communication Conference, OFC 2020

作者： Zhang, Lei Yang, Fan Ming, Hao Zhu, Yixiao Ruan, Xiaoke Li, Yanping Zhang, Fan State Key Laboratory of Advanced Optical Communication System Networks Frontiers Science Center for Nano-optoelectronics Department of Electronics Peking University Beijing100871 China

We experimentally demonstrate optical interconnects of PAM-4 signal with a single lane bit rate of 160Gb/s generated by a compact silicon based GeSi electro-absorption modulator using artificial neural network based n... 详细信息

ISBN: (纸本)9781943580712

关键词： Pulse amplitude modulation

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Four-Channel WDM Graphene optical Receiver using Mechanically Exfoliated Graphene

arXiv

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arXiv 2024年

作者： Yu, Laiwen Li, Yurui Xiang, Hengtai Li, Yuanrong Cao, Hengzhen Ji, Zhongyang Liu, Liu Xiao, Xi Yin, Jianbo Guo, Jingshu Dai, Daoxin State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and Engineering International Research Center for Advanced Photonics Zhejiang University Zijingang Campus Hangzhou310058 China State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Wuhan430074 China Jiaxing Key Laboratory of Photonic Sensing & Intelligent Imaging Intelligent Optics & Photonics Research Center Jiaxing Research Institute Zhejiang University Jiaxing314000 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China Beijing Graphene Institute Beijing100095 China

Silicon photonics with the advantages of low power consumption, low cost, and high yield is a crucial technology for facilitating high-capacity optical communications and interconnects. The graphene photodetectors (GPDs) featuring broadband operation, high speed, and low integration cost can be good additions to the conventional SiGe photodetectors, supporting silicon-integrated on-chip photodetection in new wavelength bands beyond 1.6 μm (e.g., U-band and 2 μm). Here we realize a silicon-integrated four-channel wavelength division multiplexing (WDM) optical receiver based on a micro-ring resonator (MRR) array and four p-n homojunction GPDs by using mechanically exfoliated monolayer graphene. These GPDs based on the photothermoelectric (PTE) effect operating under zero (current) bias exhibit responsivities of ~1.1 V W-1 and flat frequency responses up to 67 GHz which is set-up limited. The GPDs show good consistence benefiting from the compact active region array (0.006 mm2) covered by a single hBN/graphene/hBN stack. Moreover, the WDM graphene optical receiver realized the 4×16 Gbps non-return to zero (NRZ) optical signal transmission. To the best of our knowledge, it is the first GPD-array-based optical receiver using mechanically exfoliated graphene and edge graphene-metal conduct. This work shed light on the large-scale integration of GPDs by using the high-quality mechanically exfoliated graphene, promoting the application and development of the graphene photonic devices. Copyright © 2024, The Authors. All rights reserved.

关键词： Graphene

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ANN-Assisted Scheduling Method for Bulk Data Transfers in optical Computing Power networks

ANN-Assisted Scheduling Method for Bulk Data Transfers in Op...

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OptoElectronics and communications Conference, OECC

作者： Xiao Lin Huihuang Lin Chenxi Zhang Jun Li Keqin Shi Weiqiang Sun Weisheng Hu College of Physics and Information Engineering Fuzhou University Fuzhou China School of Electronic and Information Engineering Soochow University Suzhou China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

ANN-assisted scheduling method is presented to schedule bulk transfers across optical computing power networks in a single-path/SnF-multi-path manner. Studies demonstrate that the method outperforms the conventional m...

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Dual-Wavelength Ultra-Stable Laser Operating at 780 nm and 852 nm

Dual-Wavelength Ultra-Stable Laser Operating at 780 nm and 8...

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European Frequency and Time Forum (EFTF)

作者： Tong Shen Jiyang Ma Xiaobo Xue Yani Zuo Weinan Zhao Yabei Su Zhiyang Wang Honglei Yang Tiantian Shi Yige Lin Jingbiao Chen Shengkang Zhang Science and Technology on Metrology and Calibration Laboratory Beijing Institute of Radio Metrology and Measurement Beijing China Division of Time and Frequency National Institute of Metrology Beijing China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China National Key Laboratory of Advanced Micro and Nano Manufacture Technology School of Integrated Circuits Peking University Beijing China Hefei National Laboratory Hefei China

ISBN: (数字)9798350354270

ISBN: (纸本)9798350354287

We employed the Pound-Drever-Hall technique to independently stabilize the frequencies of two 780 nm semiconductor lasers and two 852 nm semiconductor lasers to 5 cm cube Fabry-Pérot optical cavities, with the finesse measured to be above $2.0\times 10^{5}$ across the wavelengths from 780 nm to 852 nm. By comparing the two similar laser systems, we determined that each system exhibited a fractional frequency instability of $4.0\times 10^{-15}/1\mathrm{s}$ at 780 nm and $4.2\times 10^{-15}/1\mathrm{s}$ at 852 nm, respectively. The linewidth of each system is 2.5 Hz. This ultra-stable laser system can be used for precise spectroscopic measurements of clock lines of rubidium and cesium atoms.

关键词： Semiconductor device measurement Time-frequency analysis Semiconductor lasers Wavelength measurement Measurement by laser beam Europe optical variables measurement Laser stability Frequency measurement Rubidium

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Atomic spin-exchange collisions in magnetic fields

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Physical Review A 2021年第4期103卷 043116-043116页

作者： Wei Xiao Teng Wu Xiang Peng Hong Guo State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics Center for Quantum Information Technology Peking University Beijing 100871 China

Spin-exchange collisions among alkali-metal atoms affect the coherence time and gyromagnetic ratio of atoms by redistributing the ground-state population. We theoretically study the interactions between magnetic fields and atoms in the presence of spin-exchange collisions. Using the modified Bloch equations derived from the density-matrix equation in a low spin-polarization limit, we obtain explicit formulas describing the role of spin-exchange collisions in the interactions between atoms and magnetic fields, especially the nonresonant radio-frequency fields, which are widely used to manipulate atoms. The results derived from these equations agree well with density-matrix simulations and previous experimental results, and provide a simple and precise way to quantitatively analyze the effect of spin-exchange collisions on atoms. Our paper is helpful to gain physical insight into the spin-exchange collisions and optimize the performance of atom-based precision measurement instruments.

关键词： Atomic & molecular collisions Zeeman effect Precision measurements

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Real-time 4-mode MDM Transmission U sing Triple-ring-core FMF and All-fiber Mode Multiplexers

Real-time 4-mode MDM Transmission U sing Triple-ring-core FM...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Jian Cui Shuailuo Huang Yuyang Gao Yongqi He Zhangyuan Chen Juhao Li Lei Shen Lei Zhang Changkun Yan Liubo Yang Ruichun Wang Chunxu Zhao Yu Tang Shikui Shen State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China Pengcheng Labs Shenzhen China State Key Laboratory of Optical Fiber and Cable Manufacture Technology YOFC Wuhan China Research Institute China Unicom Beijing China

Enabled by newly designed weakly-coupled triple-ring-core FMFs and all-fiber mode multiplexers, a 4-mode real-time MDM transmission is experimentally demonstrated using commercial 400G WDM OTN transceivers.

关键词： C-band optical device fabrication Asia Wavelength division multiplexing Transceivers Real-time systems Photonics

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Demonstration of Real-Time MDM-WDM Transmission Using Commercial 400G OTN Transceivers

Demonstration of Real-Time MDM-WDM Transmission Using Commer...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Lei Shen Lei Zhang Changkun Yang Liubo Yang Ruichun Wang Yuyang Gao Jian Cui Shuailuo Huang Yongqi He Zhangyuan Chen Juhao Li Chunxu Zhao Yu Tang Shikui Shen YOFC State Key Laboratory of Optical Fiber and Cable Manufacture Technology Wuhan China State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China Pengcheng Labs Shenzhen China China Unicom Research Institute Beijing China

Real-time MDM-WDM transmission was successfully demonstrated using commercial 400G DP-16QAM systems over weakly-coupled FMFs with 3 kinds of length.

关键词： Asia Real-time systems Transceivers Photonics

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Dual-Mode Dead-Zone-Free Double-Resonance Alignment-Based Magnetometer

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Physical Review Applied 2021年第2期15卷 024033-024033页

作者： He Wang Teng Wu Wei Xiao Haidong Wang Xiang Peng Hong Guo State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics Center for Quantum Information Technology Peking University Beijing 100871 China

Magneto-optical double-resonance magnetometers are attractive candidates for sensitive measurements of magnetic fields but suffer from a fundamental problem known as the “dead zone”: certain magnetic field directions where the magnetometer loses its sensitivity. We present a dead-zone-free double-resonance magnetometer with a single linearly polarized laser, which keeps uniform signal amplitude and isotropic sensitivity among varying magnetic field directions. The isotropic magnetometer can be switched between two modes, i.e., Mz mode insensitive to phase shifts and Mx mode with a higher upper bound of bandwidth. The dead-zone-free magnetometer exhibits a magnetic field noise floor of 0.9pT/Hz and 1.2pT/Hz in Mz and Mx modes, respectively. The proposed double-resonance magnetometer, benefiting from its compact single-beam structure, isotropic sensitivity, and capability of dual modes, would be useful for high-sensitivity magnetic field measurements in mobile applications.

关键词： Magneto-optical spectra Metrology Zeeman effect Atomic gases Devices optical pumping optically detected magnetic resonance

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