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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： Si–Qi Li Chao–Hai Du Zi–Chao Gao Fan–Hong Li Yi–Dong Wang Yun–Hua Tan Pu–Kun Liu State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Beijing China

ISBN: (纸本)9781665482271

In this paper, two bandpass filters based on localized spoof surface plasmons (LSSPs) are proposed. Magnetic coupling is selected as the scheme to connect the input and output ports with the LSSPs resonator. Simulation results show that the 3-dB bandwidth is 1.44 GHz (24.7 % ) from 5.10 GHz to 6.54 GHz, centered at 5.82 GHz. Compared with the counterparts coupled by microstrip lines, this work has the advantage of wide bandwidth. Compared with the conventional filters, this work has the advantages of lightness and compactness.

关键词： Band-pass filters Couplings Microwave technology Magnetic separation Simulation Resonator filters Millimeter wave technology

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Integrated Parallel Chaos driven LiDAR system with High Interference Tolerance

Integrated Parallel Chaos driven LiDAR System with High Inte...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Chen, Ruixuan Shen, Bitao Shu, Haowen Chang, Lin Xie, Weiqiang Liao, Wenchao Tao, Zihan Bowers, John Wang, Xingjun State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States Frontiers Science Center for Nano-Optoelectronics Peking University Beijing100871 China

We introduce a chaotic microcomb based high interference-tolerance parallel LiDAR. Parallel chaos with record-high noise spectra beyond 7 GHz leads to sub-cm-level ranging accuracy. The intrinsic orthogonality permits... 详细信息

ISBN: (纸本)9781957171258

关键词： optical radar

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Information theory of metasurfaces

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National Science Review 2020年第3期7卷 561-571页

作者： Haotian Wu Guo Dong Bai Shuo Liu Lianlin Li Xiang Wan Qiang Cheng Tie Jun Cui State Key Laboratory of Millimeter Waves Southeast University School of Physics and Astronomy University of Birmingham State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics Peking University

We propose a theory to characterize the information and information processing abilities of metasurfaces,and demonstrate the relation between the information of the metasurface and its radiation pattern in the far-field region. By incorporating a general aperture model with uncertainty relation in L2-space, we propose a theory to predict the upper bound of information contained in the radiation pattern of a metasurface, and reveal the theoretical upper limit of orthogonal radiation states. The proposed theory also provides guidance for inverse design of the metasurface with respect to given functionalities. Through investigation of the information of disordered-phase modulated metasurfaces, we find the information invariance(1-γ, whereγ is Euler’s constant) of chaotic radiation patterns. That is to say, the information of the disordered-phase modulated radiation patterns is always equal to 1-γ, regardless of variations in size, the number of elements and the phase pattern of metasurface. This value might be the lower bound of radiation-pattern information of the metasurface, which can provide a theoretical limit for information modulation applications, including computational imaging, stealth technologies and wireless communications.

关键词： metasurfaces differential entropy radiation information bounds maximum orthogonal radiation patterns information invariance

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High Resolution Parallel Coherent Laser Ranging Using an EO Frequency Comb

High Resolution Parallel Coherent Laser Ranging Using an EO ...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Bibo He Chenbo Zhang Rongwei Liu Peng Lei Zhangyuan Chen Xiaopeng Xie State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China

Frequency-modulated continuous-wave (FMCW) light detection and ranging (lidar) maps distance to frequency using coherent detection, which is not susceptible to stray light. The combination of the FMCW lidar and a Kerr frequency comb with a 50 GHz repetition rate enables massively parallel ranging. The resolution of FMCW lidar depends on the sweep bandwidth. However, the Kerr frequency comb can only achieve a narrow sweep bandwidth due to the cavity limitation. Here, we demonstrate a massively parallel ranging FMCW lidar based on an electro-optical frequency comb. Using the electro-optical frequency comb, we perform a 31-channel FMCW lidar with a 9.7 GHz sweep frequency bandwidth and achieve a high resolution of 1.54 cm. This approach allows for massively accurate ranging for fast three-dimensional imaging.

关键词： Laser radar Image resolution Imaging Bandwidth Stray light Coherence Distance measurement

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Cesium Faraday optical Filter for Wireless optical communication system 13

Cesium Faraday Optical Filter for Wireless Optical Communica...

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13th International Conference on Wireless communications and Signal Processing, WCSP 2021

作者： Chang, Pengyuan Shi, Hangbo Wang, Zhiyang Miao, Jianxiang Shi, Tiantian Guo, Hong Chen, Jingbiao Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Electronics Department of Electronics Beijing China

ISBN: (纸本)9781665407854

We report the newest experimental results of Cs-D2 line 852 nm Faraday optical filters for wireless optical communication system. We measure the transmission spectrum of the Faraday optical filters with different temperature, magnetic field intensity, and with or without buffer gas. The Cs-852nm Faraday optical filters is based on atomic vapor cell, with the increase of magnetic field strength and the filling of buffer gas at a certain pressure. The bandwidth, transmittance and line shape of the transmission spectrum are changed obviously. The results can be used for free-space laser communications. © 2021 IEEE.

关键词： optical communication

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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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IEEE International Frequency Control Symposium

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

SummaryWe 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.

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Reconfigurable integrated photonic processor for NP-complete problems

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advanced Photonics 2024年第5期6卷 127-135页

作者： Xiao-Yun Xu Tian-Yu Zhang Zi-Wei Wang Chu-Han Wang Xian-Min Jin Shanghai Jiao Tong University School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksCenter for Integrated Quantum Information Technologies(IQIT)ShanghaiChina Hefei National Laboratory HefeiChina Shanghai Jiao Tong University Chip Hub for Integrated Photonics Xplore(CHIPX)WuxiChina TuringQ Co. Ltd.ShanghaiChina

Nondeterministic-polynomial-time(NP)-complete problems are widely involved in various reallife scenarios but are still intractable in being solved efficiently on conventional *** is of great practical significance to construct versatile computing architectures that solve NP-complete problems with computational ***,we present a reconfigurable integrated photonic processor to efficiently solve a benchmark NP-complete problem,the subset sum *** show that in the case of successive primes,the photonic processor has genuinely surpassed electronic processors launched recently by taking advantage of the high propagation speed and vast parallelism of photons and state-of-the-art integrated photonic ***,we are able to program the photonic processor to tackle different problem instances,relying on the tunable integrated modules,variable split junctions,which can be used to build a fully reconfigurable architecture potentially allowing 2^(N) configurations at *** experiments confirm the potential of the photonic processor as a versatile and efficient computing platform,suggesting a possible practical route to solving computationally hard problems at a large scale.

关键词： optical computing NP-complete problem photonic chip femtosecond laser direct writing

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Towards silicon photonic neural networks for artificial intelligence

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Science China(Information Sciences) 2020年第6期63卷 105-118页

作者： Bowen BAI Haowen SHU Xingjun WANG Weiwen ZOU State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Engineering and Computer Science Peking University Frontiers Science Center for Nano-optoelectronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Intelligent Microwave Lightwave Integration Innovation Center(iMLic) Department of Electronic Engineering Shanghai Jiao Tong University

Brain-inspired photonic neural networks for artificial intelligence have attracted renewed interest. For many computational tasks, such as image recognition, speech processing and deep learning, photonic neural networks have the potential to increase the computing speed and energy efficiency on the orders of magnitude compared with digital electronics. Silicon Photonics, which combines the advantages of electronics and photonics, brings hope for the large-scale photonic neural network integration. This paper walks through the basic concept of artificial neural networks and focuses on the key devices which construct the silicon photonic neuromorphic systems. We review some recent important progress in silicon photonic neural networks, which include multilayer artificial neural networks and brain-like neuromorphic systems, for artificial intelligence. A prototype of silicon photonic artificial intelligence processor for ultra-fast neural network computing is also proposed. We hope this paper gives a detailed overview and a deeper understanding of this emerging field.

关键词： photonic neural networks artificial intelligence deep learning photonic computing accelerator silicon photonics

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PAM-4 optical transmission beyond 224 Gbps based on an ultrahigh-bandwidth slow-light silicon modulator

PAM-4 optical transmission beyond 224 Gbps based on an ultra...

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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Han, Changhao Qin, Jun Yang, Qipeng Zheng, Zhao Shu, Haowen Zhang, Yunhao Wu, Yichen Sun, Yu Lu, Junde Zhou, Yan Ge, Zhangfeng Wang, Lei He, Zhixue Yu, Shaohua Hu, Weiwei Peng, Chao Bowers, John E. Wang, Xingjun State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing100192 China Frontiers Science Center for Nano-optoelectronics Peking University Beijing100871 China Peng Cheng Laboratory Shenzhen518055 China Peking University Yangtze Delta Institute of Optoelectronics Nantong226010 China

We experimentally demonstrate PAM-4 optical transmission beyond 224 Gbps based on an ultrahigh-bandwidth slow-light silicon modulator in C-band with the combination of the artificial neural network equalizers. © ... 详细信息

关键词： Light modulators

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Multi-Dimensional Soft Decoding to Mitigate the Residual IC-XT in Coupled-Core MCF Links

Multi-Dimensional Soft Decoding to Mitigate the Residual IC-...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Junze Fu Lin Sun Junjie Xiong Lin Ma School of Electronic and Information Engineering Soochow University Suzhou Jiangsu China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

A multi-dimensional soft decoding method is proposed and experimentally demonstrated on coupled-core MCF transmission links. Residual intercore crosstalk (IC-XT) can be effectively mitigated with using the MIMO equali... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： optical fibers Integrated optics Multicore processing Crosstalk optical crosstalk optical fiber communication optical coupling MIMO Decoding Photonics

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