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Quantum microwave photonics in radio-over-fiber systems

Photonics Research 2022年第7期10卷 1669-1678页

作者： YAQING JIN YE YANG HUIBO HONG XIAO XIANG RUNAI QUAN TAO LIU SHOUGANG ZHANG NINGHUA ZHU MING LI RUIFANG DONG key laboratory of Time and Frequency Primary Standards National Time Service CenterChinese Academy of SciencesXi’an 710600China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China state key laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China The 29th Research Institute of China Electronics Technology Group Corporation Chengdu 610029China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China

As the main branch of microwave photonics,radio-over-fiber technology provides high bandwidth,low-loss,and long-distance propagation capability,facilitating wide applications ranging from telecommunication to wireless *** ultrashort pulses as the optical carrier,a large capacity is further ***,the wide bandwidth of ultrashort pulses results in the severe vulnerability of high-frequency radio frequency(RF)signals to fiber *** a time-energy entangled biphoton source as the optical carrier combined with the singlephoton detection technique,a quantum microwave photonics method in radio-over-fiber systems is proposed and demonstrated *** results show that it not only realizes unprecedented nonlocal RF signal modulation with strong resistance to the dispersion but also provides an alternative mechanism to distill the RF signal out from the dispersion ***,the spurious-free dynamic ranges of the nonlocally modulated and distilled RF signals have been significantly *** the ultra-weak detection and the high-speed processing advantages endowed by the low-timing-jitter single-photon detection,the quantum microwave photonics method opens new possibilities in modern communication and networks.

关键词： fiber ultrashort microwave

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Two-dimensional materials for ultrafast lasers

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Chinese Physics B 2017年第3期26卷 25-38页

作者：王枫秋 School of Electronic Science and Engineering and Collaborative Innovation Center of advanced Microstructures Nanjing University Nanjing 210093 China

As the fundamental optical properties and novel photophysics of graphene and related two-dimensional （2D） crystals are being extensively investigated and revealed, a range of potential applications in optical and optoelectronic devices have been proposed and demonstrated. Of the many possibilities, the use of 2D materials as broadband, cost-effective and versatile ultrafast optical switches （or saturable absorbers） for short-pulsed lasers constitutes a rapidly developing field with not only a good number of publications, but also a promising prospect for commercial exploitation. This review primarily focuses on the recent development of pulsed lasers based on several representative 2D materials. The comparative advantages of these materials are discussed, and challenges to practical exploitation, which represent good future directions of research, are laid out.

关键词： ultrafast lasers mode-locking Q-switching graphene transition metal dichalcogenides blackphosphorus topological insulators

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4×4 MIMO fiber-wireless transmission based on an integrated four-channel directly modulated optical transceiver

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Photonics Research 2019年第12期7卷 1461-1467页

作者： DI ZHANG YAO YE LEI DENG DI LI HAIPING SONG YUCHENG ZHANG MINMING ZHANG SHU WANG DEMING LIU School of Electronic Information and communications Huazhong University of Science and TechnologyWuhan 430074China Wuhan National laboratory for Optoelectronics and School of optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

In this paper, an integrated compact four-channel directly modulated analog optical transceiver is proposed and fabricated. The 3 d B bandwidth of this optical transceiver exceeds 20 GHz, and the measured spurious-free dynamic range is up to 91.2 d B · Hz^2∕3. The optical coupling efficiency(CE) is improved by using a precise submicron alignment technique for lens coupling in a transmitter optical subassembly, and the highest CE is achieved when the oblique angle of the arrayed waveguide grating using a silica-based planar lightwave circuit(AWG-PLC) in receiver optical sub assembly is set to 42°. Based on the proposed optical transceiver, we have experimentally demonstrated a 6.624 Gbit/s 4 × 4 multi-input multioutput(MIMO) 16-quadrature amplitude modulation orthogonal frequency division multiplexing(16 QAM-OFDM) radio signal over 15.5 km standard single mode fiber, together with 1.2 m wireless transmission in both an uplink and a downlink. To cope with the channel interference and noise of the fiber-wireless transmission system, a low-complexity MIMO demodulation algorithm based on lattice reduction zero-forcing(LR-ZF) is designed. In our experiment, 1.6 d B power penalty is achieved by using the proposed LR-ZF algorithm, compared to the commonly used zero-forcing ***, this LR-ZF algorithm has much less complexity than the optimal maximum-likelihood sequence estimation(MLSE) at a given transmission performance. These results not only demonstrate the feasibility of the integrated optical transceiver for MIMO fiber-wireless application but also validate that the proposed LR-ZF algorithm is effective to eliminate the interference for hybrid fiber-wireless transmission.

关键词： fiber MIMO transceiver

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Broad-intensity-range optical nonreciprocity based on feedback-induced Kerr nonlinearity

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Photonics Research 2021年第7期9卷 1218-1225页

作者： LEI TANG JIANGSHAN TANG HAODONG WU JING ZHANG MIN XIAO keyU XIA College of Engineering and Applied Sciences National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Automation Tsinghua UniversityBeijing 100084China Center for Quantum Information Science and Technology Tsinghua National Laboratory for Information Science and Technology(TNList)Beijing 100084China Department of Physics University of ArkansasFayettevilleArkansas 72701USA

Nonreciprocal light propagation plays an important role in modern optical systems,from photonic networks to integrated photonics. We propose a nonreciprocal system based on a resonance-frequency-tunable cavity and intensity-adaptive feedback control. Because the feedback-induced Kerr nonlinearity in the cavity is dependent on the incident direction of light,the system exhibits nonreciprocal transmission with a transmission contrast of 0.99 and an insertion loss of 1.5 dB. By utilizing intensity-adaptive feedback control,the operating intensity range of the nonreciprocal system is broadened to 20 dB,which relaxes the limitation of the operating intensity range for nonlinear nonreciprocal systems. Our protocol paves the way to realize high-performance nonreciprocal propagation in optical systems and can also be extended to microwave systems.

关键词： reciprocal nonlinearity intensity

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Correction to: Recent developments in photoacoustic imaging and sensing for nondestructive testing and evaluation

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Visual Computing for Industry,Biomedicine,and Art 2021年第1期4卷 90-90页

作者： Sung-Liang Chen Chao Tian University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai 200240China Engineering Research Center of Digital Medicine and Clinical Translation Ministry of EducationShanghai 200030China state key laboratory of advanced optical communication systems and networks Shanghai Jiao Tong UniversityShanghai 200240China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026AnhuiChina

Following publication of the original article[1],the authors identified an error in the article *** first word ‘Review’ is added mistakenly by the typesetter.

关键词： testing mistake evaluation

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Theoretical analysis of PAM-N and M-QAM BER computation with single-sideband signal

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Science China(Information Sciences) 2021年第8期64卷 172-181页

作者： Dongxu LU Xian ZHOU Yuqiang YANG Jiahao HUO Jinhui YUAN Keping LONG Changyuan YU Alan Pak Tao LAU Chao LU Beijing Engineering and Technology Research Center for Convergence networks and Ubiquitous Services University of Science and Technology Beijing Department of Electrical Engineering The Hong Kong Polytechnic University Department of Electronic and Information Engineering The Hong Kong Polytechnic University

In this paper, the theoretical bit error rate(BER) of N-level pulse amplitude modulation(PAMN)and M-ary quadrature amplitude modulation(M-QAM) have been studied and compared under different scenarios, including(i) PAM with intensity modulation with direct detection(IM/DD) and field modulation with detection(FMD)(including coherent detection and single-sideband modulation with direct detection(SSB-DD)), and(ii) QAM with coherent detection and SSB-DD. Considering the relationship between the symbol spacing and signal-to-noise ratio(SNR), we provide the mathematical BER equations, including the optical signal-to-noise ratio(OSNR) and carrier-to-signal power ratio(CSPR), especially for PAM *** verify the validity of our theoretical expressions for SSB systems, transmissions with 224-Gb/s SSBPAM4/16 QAM signals using the Kramers-Kronig(KK) receiver were implemented on a unified optical system platform. The simulation results agreed well with theoretical calculations both in back-to-back(BtB) and120-km transmission scenarios, which showed that the BER evaluation methods can serve as a theoretical guidance and system assessment criteria for SSB scenarios.

关键词： N-level pulse amplitude modulation(PAM-N) M-ary quadrature amplitude modulation(MQAM) BER computation single-sideband(SSB) Kramers-Kronig receiver

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Compact,integrated PLZT optical switch array

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Chinese Optics Letters 2015年第11期13卷 37-40页

作者：胡国华戚志鹏恽斌峰张若虎崔一平 advanced Photonics Center Southeast University

Due to the excellent electro-optic properties of lead lanthanum zirconium titanate(ePb; LaTeZr; TiTO3, PLZT),compact 1 × 2 and 1 × 4 PLZT optical switches with a high response speed are proposed and fabricated successfully in this Letter. By introducing a thin isolating layer between the waveguides and the electrodes, the absorption loss of the fabricated 1 × 2 PLZT switch caused by the electrodes is reduced 8.9 d B with a relatively low driving voltage. The 1 × 2 PLZT switch shows an insertion loss of 18.3 d B and crosstalk of-20.5 d B at an applied voltage of 9.5 V. The fabricated 1 × 4 switch array shows an insertion loss of 20.7 d B and a crosstalk of-20.5 d B at an applied voltage of 13 V. The response time of the switches is less than 27 ns, and the device’s size is only 15 mm × 6 mm. The switches can be used in optical communication systems.

关键词： switch PLZT crosstalk titanate lanthanum waveguide

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Erratum to‘Topologically protected polarization quantum entanglement on a photonic chip’[Chip 1,100003(2022)]

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Chip 2022年第2期1卷 7-7页

作者： Yao Wang Yong-Heng Lu Jun Gao Yi-Jun Chang Ruo-Jing Ren Zhi-Qiang Jiao Zhe-Yong Zhang Xian-Min Jin Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Com-munication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Tech-nology of ChinaHefeiAnhui 230026China

Given his role as Executive Editor of this journal,Xian-Min Jin had no involvement in the peer-review of the article titled‘Topologically pro-tected polarization quantum entanglement on a photonic chip’(Chip 1,100003),and had no access to information regarding its *** responsibility for the editorial process for this article was delegated to Xibo Feng(***@***)at Chip Editorial Office.

关键词： quantum protected journal

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A comprehensive study on fault tolerance in stream processing systems

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Frontiers of Computer Science 2022年第2期16卷 80-97页

作者： Xiaotong WANG Chunxi ZHANG Junhua FANG Rong ZHANG Weining QIAN Aoying ZHOU School of Data Science and Engineering East China Normal UniversityShanghai 200062China advanced Data Analytics laboratory of Soochow University Suzhou 215006China

Stream processing has emerged as a useful technology for applications which require continuous and low latency computation on infinite streaming *** stream processing systems(SPSs)usually require distributed deployment on clusters of servers in face of large-scale of data,it is especially common to meet with failures of processing nodes or communication networks,but should be handled seriously considering service quality.A failed system may produce wrong results or become unavailable,resulting in a decline in user experience or even significant financial ***,a large amount of fault tolerance approaches have been proposed for *** approaches often have their own priorities on specific performance concerns,e.g.,runtime overhead and recovery ***,there is a lack of a systematic overview and classification of the state-of-the-art fault tolerance approaches in SPSs,which will become an obstacle for the development of ***,we investigate the existing achievements and develop a taxonomy of the fault tolerance in ***,we propose an evaluation framework tailored for fault tolerance,demonstrate the experimental results on two representative open-sourced SPSs and exposit the possible disadvantages in current ***,we specify future research directions in this domain.

关键词： fault tolerance performance evaluation stream processing

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Toward memristive in-memory computing:principles and applications

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Frontiers of Optoelectronics 2022年第2期15卷 101-125页

作者： Han Bao Houji Zhou Jiancong Li Huaizhi Pei Jing Tian Ling Yang Shengguang Ren Shaoqin Tong Yi Li Yuhui He Jia Chen Yimao Cai Huaqiang Wu Qi Liu Qing Wan Xiangshui Miao School of Integrated Circuits School of Optical and Electronic InformationWuhan National Laboratory for OptoelectronicsOptics Valley LaboratoryHuazhong University of Science and TechnologyWuhan 430074China Hubei Yangtze Memory Laboratories Wuhan430205China AI Chip Center for Emerging Smart systems InnoHK CentersHong Kong Science ParkHong KongChina School of Integrated Circuits Peking UniversityBeijing 100871China School of Integrated Circuits Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijing 100084China Frontier Institute of Chip and System Fudan UniversityShanghai 200433China School of Electronic Science and Engineering and Collaborative Innovation Centre of Advanced MicrostructuresNanjing UniversityNanjing 210093China

With the rapid growth of computer science and big data,the traditional von Neumann architecture suffers the aggravating data communication costs due to the separated structure of the processing units and *** in-memory computing paradigm is considered as a prominent candidate to address these issues,and plentiful applications have been demonstrated and *** applications can be broadly categorized into two major types:soft computing that can tolerant uncertain and imprecise results,and hard computing that emphasizes explicit and precise numerical results for each task,leading to different requirements on the computational accuracies and the corresponding hardware *** this review,we conduct a thorough survey of the recent advances of memristive in-memory computing applications,both on the soft computing type that focuses on artificial neural networks and other machine learning algorithms,and the hard computing type that includes scientific computing and digital image *** the end of the review,we discuss the remaining challenges and future opportunities of memristive in-memory computing in the incoming Artificial Intelligence of Things era.

关键词： Memristor In-memory computing Matrix-vector multiplication Machine learning Scientific computing Digital image processing

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