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Two-photon 3D printed spring-based Fabry-Pérot cavity resonator for acoustic wave detection and imaging

Photonics Research 2023年第5期11卷 780-786页

作者： HEMING WEI ZHANGLI WU KEXUAN SUN HAIYAN ZHANG CHEN WANG KEMIN WANG TIAN YANG FUFEI PANG XIAOBEI ZHANG TINGYUN WANG SRIDHAR KRISHNASWAMY Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai UniversityShanghai 200444China School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Optical Communication Systems and Networks Key Laboratory for Thin Film and Microfabrication of the Ministry of EducationSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Center for Smart Structures and Materials Northwestern UniversityEvanstonIllinois 60208USA

optical fiber microresonators have attracted considerable interest for acoustic detection because of their compact size and high optical ***,we have proposed,designed,and fabricated a spring-based Fabry-Pérot cavity microresonator for highly sensitive acoustic *** observed two resonator vibration modes:one relating to the spring vibration state and the other determined by the point-clamped circular plate vibration *** found that the vibration modes can be coupled and optimized by changing the structure *** proposed resonator is directly 3D printed on an optical fiber tip through two-photon polymerization and is used for acoustic detection and *** experiments show that the device exhibits a high sensitivity and low noise equivalent acoustic signal level of 2.39 mPa∕Hz^(1∕2)at 75 kHz that can detect weak acoustic waves,which can be used for underwater object *** results demonstrate that the proposed work has great potential in acoustic detection and biomedical imaging applications.

关键词： resonator fiber cavity

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Dual-Tap optical-Digital Feedforward Equalization Enabling High-Speed optical Transmission in IM/DD systems

arXiv

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arXiv 2024年

作者： Guo, Yu Wu, Yangbo Yang, Zhao Xue, Lei Liang, Ning Ren, Yang Tu, Zhengrui Feng, Jia Zhuge, Qunbi The State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

Intensity-modulation and direct-detection (IM/DD) transmission is widely adopted for high-speed optical transmission scenarios due to its cost-effectiveness and simplicity. However, as the data rate increases, the fiber chromatic dispersion (CD) would induce a serious power fading effect, and direct detection could generate inter-symbol interference (ISI). Moreover, the ISI becomes more severe with the increase of fiber length, thereby highly restricting the transmission distance of IM/DD systems. This paper proposes a dual-tap optical-digital feedforward equalization (DT-ODFE) scheme, which could effectively compensate for CD-induced power fading while maintaining low cost and simplicity. A theoretical channel response is formulated for IM/DD transmission, incorporating a dual-tap optical equalizer, and the theoretical analysis reveals that for an IM/DD transmission using 1371nm over 10km standard single-mode fiber (SSMF), frequency notch is removed from 33.7GHz to 46GHz. Simulation results show that the DT-ODFE achieves an SNR gain of 2.3dB over IM/DD systems with symbol-space feedforward equalizer (FFE) alone. As the fiber length increases to 15 km, DT-ODFE performs well, while FFE, decision-feedback equalizer (DFE) and Volterra nonlinear equalizers (VNLE) all fail to compensate for the power fading and the 7% hard-decision FEC limit is not satisfied. For 200 Gb/s/λ PAM-4 over 15km SSMF, results show that the signal-to-noise ratio (SNR) of the proposed DT-ODFE with optimal coefficients satisfies the 7% hard-decision FEC limit, which uncovers the great potential of the DT-ODFE for high-speed IM/DD systems in LR/FR scenarios. © 2024, CC BY.

关键词： Chromatic dispersion

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A Simplified Model of Phase Evolution in Comb-based Time-frequency Transfer

A Simplified Model of Phase Evolution in Comb-based Time-fre...

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European Frequency and Time Forum (EFTF)

作者： Dongrui Yu Yufei Zhang Ziyang Chen Hong Guo State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics and Center for Quantum Information Technology Peking University Beijing China

ISBN: (数字)9798350354270

ISBN: (纸本)9798350354287

optical frequency combs, characterized by high signal-to-noise ratio and fine time resolution, have made signifi-cant contributions in the field of optical time-frequency transfer towards long distance and high precision. In such a system, the phase time information of the combs is hard to directly describe, which set barriers to further improving the system performance via theoretical analysis. In this work, we present a simplified model of comb phase evolution in fiber, based on coherent wave superposition, to quantitatively characterize the phase time variation. The impact of OFC repetition frequency fluctuation, carrier-envelope-offset fluctuation and dispersion terms during propagation are analyzed respectively, and numerical simulations can further simplify and visualize the calculations. Future opti-mization is expected to involve self-phase modulation and other nonlinear effects.

关键词： optical fibers Time-frequency analysis Visualization Frequency modulation Fluctuations system performance optical harmonic generation Numerical models Signal resolution Signal to noise ratio

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A Chaotic Encryption Algorithm with Dynamic key Enabled by Power-Division Multiplexed Transmission

A Chaotic Encryption Algorithm with Dynamic Key Enabled by P...

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

作者： Ding, Yinchen Lei, Yi Lu, Qi Guo, Zhongyi Chen, Bin School of Computer Science and Information Engineering Hefei University of Technology Hefei China Hefei University of Technology Intelligent Interconnected Systems Laboratory of Anhui Province Hefei China Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks China

Using power-division multiplexing, a chaotic encryption method is proposed based on dynamic key generated from the instantaneously transmitted information. The influence of power allocation is analyzed and the securit... 详细信息

ISBN: (纸本)9798350312614

关键词： chaotic encryption dynamic key optical fiber communication physical layer security power-division mul-tiplexing

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Multi-particle quantum walks on 3D integrated photonic chip

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Light(Science & Applications) 2024年第12期13卷 3129-3138页

作者： Wen-Hao Zhou Xiao-Wei Wang Ruo-Jing Ren Yu-Xuan Fu Yi-Jun Chang Xiao-Yun Xu Hao Tang Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China Hefei National Laboratory Hefei 230088China School of Artificial Intelligence Science and Technology University of Shanghai for Science and TechnologyShanghaiChina Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghaiChina Chip Hub for Integrated Photonics Xplore(CHIPX) Shanghai Jiao Tong UniversityWuxi 214000China TuringQ Co. Ltd.Shanghai 200240China

Quantum walks provide a speed-up in computational power for various quantum algorithms and serve as inspiration for the construction of complex graph *** pioneering works have been dedicated to expanding the experimental state space and the complexity of ***,these experiments are mostly limited to small experimental scale,which do not reach a many-body level and fail to reflect the multi-particle quantum interference effects among non-adjacent ***,we present a quantum walk with three photons on a two-dimensional triangular lattice,which is mapped to a 19×19×19 high-dimensional state space and constructs a complex graph with 6859 nodes and 45,486 *** utilizing the statistical signatures of the output combinations and incorporating machine learning techniques,we successfully validate the nonclassical properties of the *** implementation provides a paradigm for exponentially expanding the state space and graph complexity of quantum walks,paving the way for surmounting the classical regime in large-scale quantum simulations.

关键词： quantum particle expanding

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Interferometric Fiber-Optic Sensor for Electrical Partial Discharge Detection 28

Interferometric Fiber-Optic Sensor for Electrical Partial Di...

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28th International Conference on optical Fiber Sensors, OFS 2023

作者： Yan, Gaocheng Chen, Jiageng Niu, Heng Qiao, Feng He, Zuyuan State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China Shangwei Technology Co. Ltd. 23 Wanghai Road Fujian Xiamen361008 China

We propose an interferometric fiber-optic sensor and investigate its ability to measure the partial discharge in electrical applications. Preferable performance can be achieved under system self-noise level of 10−6 ra... 详细信息

ISBN: (纸本)9781957171302

关键词： Partial discharges

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Dual-Wavelength Ultra-Stable Laser Operating at 780 nm and 852 nm 37

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

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37th European Frequency and Time Forum, EFTF 2024

作者： Shen, Tong Ma, Jiyang Xue, Xiaobo Zuo, Yani Zhao, Weinan Su, Yabei Wang, Zhiyang Yang, Honglei Shi, Tiantian Lin, Yige Chen, Jingbiao Zhang, Shengkang Beijing Institute of Radio Metrology and Measurement Science and Technology on Metrology and Calibration Laboratory Beijing100854 China National Institute of Metrology Division of Time and Frequency Beijing102200 China School of Integrated Circuits Peking University National Key Laboratory of Advanced Micro and Nano Manufacture Technology Beijing100871 China School of Electronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing100871 China Hefei National Laboratory Hefei230088 China

ISBN: (纸本)9798350354270

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× 105 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× 10-15/1s at 780 nm and 4.2× 10-15/1s 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. © 2024 IEEE.

关键词： Semiconductor lasers

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Integration of classical communication and quantum key distribution using frequency division multiplexing

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中国光学快报（英文版） 2025年第3期23卷 125-130页

作者：邵蕴语沈子毅徐越寒李琅谭子聪廖晓娟黄鹏王涛曾贵华 State Key Laboratory of Advanced Optical Communication Systems and Networks Center for Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai 200240 China School of Sensing Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Hefei National Laboratory Hefei 230088 China

Since the working conditions of classical and quantum signals are very different,how to effectively integrate classical and quantum communication networks without affecting their respective performance has become a great *** this paper,we proposed a scheme to realize classical communication and continuous-variable quantum key distribution(CV-QKD)based on frequency-division multiplexing(FDM),and we verified the feasibility of simultaneously realizing CV-QKD and classical optical communication data synchronous transmission scheme under the same *** achieved a 0 bit error rate in 50 frames and a 20 Mb/s bit rate for the classical signal and an average secret key rate of around 5.86×105 bit/s for the quantum signal through a 4 dB fiber *** work provides a scheme to establish a QKD channel by only reserving a small passband in the entire optical communication instead of an entire wavelength,increasing efficiency and simplifying the integration of QKD and classical communication.

关键词： classical communication quantum key distribution frequency-division multiplexing

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Low-loss Zero-index Waveguides and Devices

Low-loss Zero-index Waveguides and Devices

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Dong, Tian Dai, Tianxiang Chen, Ye Liu, Yueyang Liu, Hancheng Wang, Yiting Ma, Anqi Hu, Haifeng Xu, Lihua Zhao, Le Chu, Weiguo Peng, Chao Wang, Jianwei Li, Yang State Key Laboratory of Precision Measurement Technology and Instrument Department of Precision Instrument Tsinghua University Beijing100084 China State Key Laboratory for Mesoscopic Physics School of Physics Peking University Beijing100871 China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics and Frontiers Science Center for Nano-optoelectronics Peking University Beijing100871 China Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang University Beijing100191 China Nanofabrication Laboratory National Center for Nanoscience and Technology Beijing100190 China

We report flexible zero-index waveguides and devices whose loss is two orders of magnitude lower than the state of the art, enabling phase-error-free high-dense photonic integrated circuits for classical and quantum i... 详细信息

ISBN: (纸本)9781957171395

关键词： Photonic integrated circuits

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Bound vortex light in an emulated topological defect in photonic lattices

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Light(Science & Applications) 2022年第9期11卷 2147-2154页

作者： CHONG SHENG YAO WANG YIJUN CHANG HUIMING WANG YONGHENG LU YINGYUE YANG SHINING ZHU XIANMIN JIN HUI LIU National Laboratory of Solid State Microstructures and School of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingJiangsu 210093China Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic InnovationCenter in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Topology have prevailed in a variety of branches of *** topological defects in cosmology are speculated akin to dislocation or disclination in solids or liquid *** the development of classical and quantum simulation,such speculative topological defects are well-emulated in a variety of condensed matter ***,the underlying theoretical foundations can be extensively applied to realize novel optical ***,with the aid of transformation optics,we experimentally demonstrated bound vortex light on optical chips by simulating gauge fields of topological linear defects in cosmology through position-dependent coupling coefficients in a deformed photonic ***,these types of photonic lattices inspired by topological linear defects can simultaneously generate and transport optical vortices,and even can control the orbital angular momentum of photons on integrated optical chips.

关键词： topological vortex lattices

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