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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Ding, Baoqin Pei, Li Bai, Bing Bai, Bowen Sui, Juan Wang, Jianshuai Key Laboratory of All-Optical Networks and Modern Communication Networks of Ministry of Education Institute of Lightwave Technology Beijing Jiaotong University Beijing100044 China Technology Company Ltd. Beijing100081 China State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China

ISBN: (纸本)9781957171395

The small-scale integrated photonic reservoirs excel in binary tasks but encounter challenges in broader predictions. This article achieves superior prediction performance by refining both algorithmic and input strategy perspectives, utilizing a 32-node integrated photonic reservoir. © Optica Publishing Group 2024, © 2024 The Author(s)

关键词： Photonic integrated circuits

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Efficient and Ultra-Low-Complexity Inter-Channel Nonlinearity Mitigation Based on Residual Carrier for PS-256-QAM WDM Transmission

Efficient and Ultra-Low-Complexity Inter-Channel Nonlinearit...

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OptoElectronics and communications Conference, OECC

作者： Yixiao Zhu Xiansong Fang Jiayu Zheng Ziheng Zhang Weisheng Hu Fan Zhang 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 State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Shanghai Jiao Tong University Shanghai China Pengcheng Laboratory Shenzhen China

We propose and experimentally demonstrate an efficient and ultra-low-complexity inter-channel nonlinearity mitigation using residual carrier-based phase tracking. Without information of neighboring channels, 1.4-dB Q ... 详细信息

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

关键词： Q measurement Power measurement Spectral efficiency Prevention and mitigation optical switches optical variables measurement optical fiber networks Wavelength division multiplexing Probes Standards

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optically Pumped Cesium Beam Clock Using Monochromatic Light

Optically Pumped Cesium Beam Clock Using Monochromatic Light

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IEEE International Frequency Control Symposium

作者： Chen Liu Yuanhao Li Sifei Chen Lifeng Fan Yanhui Wang State Key Laboratory of Advanced Optical Communication System and Network School of Electronics Peking University Beijing China

We propose a new method about optically pumped cesium beam clock. Due to the magnetic field of selecting magnet, the pumping light and detection light use the same frequency laser which makes system structure simpler....

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Time-Series Prediction Tasks with a Small-Scale Integrated Photonic Reservoir

Time-Series Prediction Tasks with a Small-Scale Integrated P...

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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

关键词： Photonic integrated circuits

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Net 206-Gb/s Carrier-Aided Intensity Modulation Direct Detection without Power Fading

Net 206-Gb/s Carrier-Aided Intensity Modulation Direct Detec...

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OptoElectronics and communications Conference, OECC

作者： Yimin Hu Yixiao Zhu Xiansong Fang Guangying Yang Weisheng Hu Fan Zhang 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 State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Shanghai Jiao Tong University Shanghai China Pengcheng Laboratory Shenzhen China

We propose and experimentally demonstrate low-cost carrier-aided IM-DD scheme to overcome dispersion-induced power fading. With Kramers-Kronig and residual carrier-based recovery, SSBI and MHz laser phase noise are mi... 详细信息

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

关键词： Fading channels Phase noise optical fibers Laser noise Interference optical fiber networks Intensity modulation optical noise optical fiber dispersion Fiber lasers

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High-Precision Fiber-Optic Time Transfer system Based on Bidirectional FDM and Correlation Processing

High-Precision Fiber-Optic Time Transfer System Based on Bid...

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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： Xie, Kunfeng Hu, Liang Chen, Jianping Wu, Guiling Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic Engineering China Shanghai Jiao Tong University Shanghai Key Laboratory of Navigation and Location Based Services Shanghai China

ISBN: (纸本)9798350311426

We report on a high-precision fiber-optic time transfer system over single optical fiber utilizing the same wavelength in both directions based on bidirectional frequency division multiplexing and cross correlation processing (BFDM-CR). The probe signals and the backscattering noises are effectively discriminated by electrical bandpass filtering for the non-overlapping spectrum of the bidirectional transmission signals. In this way, the impact of the Rayleigh backscattering and the dispersion-induced symmetric deviation over fiber link can be suppressed at the same time. The time interval of the received signals and the local signals is obtained by cross correlation processing to improve the SNR of the measurement on the time interval. A time transfer system based on BFDM-CR over 50km fiber-link is experimentally demonstrated. The stabilities in terms of time deviation (TDEV) are less than 19.2 ps/s and 2.2 ps/10000s, respectively. © 2023 IEEE.

关键词： fiber-optic frequency division multiplexing time transfer

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1780-km Reach Extension with Equalization-Enhanced Phase Noise Compensation Using 3-MHz LO for WDM Coherent Transmission

1780-km Reach Extension with Equalization-Enhanced Phase Noi...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Yixiao Zhu Xiansong Fang Xiang Cai Yimin Hu Weisheng Hu Fan Zhang 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 Pengcheng Laboratory Shenzhen China

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

We propose and experimentally demonstrate an efficient equalization-enhanced phase noise compensation scheme for long-haul coherent transmission. The distance is extended by 1780km and 470km for $\mathbf{788.4}-\mathbf{Gb}/\mathbf{s}/\boldsymbol{\lambda}$ and 968.4- $\mathbf{Gb}/\mathbf{s}/\boldsymbol{\lambda}$ line rate WDM transmission, respectively, using 3-MHz LO and receiver-side dispersion compensation.

关键词： Phase noise Laser noise Asia Wavelength division multiplexing optical fiber communication optical transmitters Time-domain analysis Dispersion Photonics

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Compact 459-nm Cs Cell optical Frequency Standard with 2.1×10−13/τ Short-Term Stability

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Physical Review Applied 2022年第2期18卷 024034-024034页

作者： Jianxiang Miao Tiantian Shi Jia Zhang Jingbiao Chen State Key Laboratory of Advanced Optical Communication System and Network School of Electronics Peking University Beijing 100871 China

We achieve a compact optical frequency standard with an extended cavity diode laser locked to the 459-nm 6S1/2-7P1/2 transition of thermal 133Cs atoms in a ϕ10mm×50mm glass cell, using modulation transfer spectroscopy (MTS). The self-estimated frequency stability of this laser is 1.4×10−14/τ. With heterodyne measurement, we verify the linewidth-narrowing effect of MTS locking and measure the frequency stability of the locked laser. The linewidth of each laser is reduced from the free-running 69.6 to 10.3 kHz after MTS stabilization, by a factor of 6.75. The Allan deviation measured via beat detection is 2.1×10−13/τ for each MTS-stabilized laser. In addition, we measure the hyperfine structure of the 7P1/2 energy level based on the heterodyne measurements, and calculate the magnetic dipole constant A of the Cs 7P1/2 level to be 94.38(6) MHz, which agrees well with previous measurements. This compact optical frequency standard can also be used in other applications that require high-stability lasers, such as laser interferometry, laser cooling, geodesy, and so on.

关键词： Atomic, optical & lattice clocks Time & frequency standards Diode lasers

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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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基于最先进的光钟直接演示自旋压缩引起的计量增强

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Science Bulletin 2024年第10期69卷 1359-1361页

作者：陈景标于得水 State Key Laboratory of Advanced Optical Communication System and NetworkSchool of ElectronicsPeking UniversityBeijing 100871China National Time Service Center Chinese Academy of SciencesXi’an 710600China Key Laboratory of Time Reference and Applications Chinese Academy of SciencesXi’an 710600China

Benefiting from the recent progress in precise engineering of quantum states and sub-10 mHz linewidth lasers,the stability and accuracy of optical atomic clocks have reached and even exceeded the 1018 level,surpassing their microwave counterparts by over two orders of magnitude[1,2].These advances lead to an anticipated redefinition of the international system of units(SI)second in terms of an optical reference transition as early as 2026.

关键词： optical 光钟自旋压缩

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