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IEEE International Workshop on Imaging systems and Techniques (IST)

作者： Pengfei Shi Yongkun Wang Ying Hu Yaohui Jin The State Key Lab of Advanced Optical Communication Systems and Networks China Network & Information Center Shanghai Jiao Tong University Shanghai China

Shape matching and retrieval are fundamental topics in image processing area. With the rapid growing number of images, fast speed in shape matching is necessary, but most methods focus on the retrieval accuracy. In this article, we propose a dynamic angular partition descriptor (DAPD) based on the statistical distribution of the shape contour points, which is scale invariant inherently. DAPD has low computational complexity which enables fast shape matching, and naturally sacrifices a little accuracy in retrieval. However, we leverage the angle sensitivity in the structure of DAPD, which can compensate the loss in accuracy by 4.46% on average. Experiments on several shape databases show that, our descriptor can speed up shape matching by up to 1.X, but still retains 91.92% accuracy in the top-4 similar shapes in retrieval tests. Meanwhile, we generate some distorted shapes to verify the robustness of DAPD against rotation and noise.

关键词： Shape Sensitivity Computational complexity Histograms Automobiles Statistical distributions

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Reducing crosstalk of silicon-based optical switch with alloptical multi-wavelength regenerator

Reducing crosstalk of silicon-based optical switch with allo...

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Asia communications and Photonics Conference, ACPC 201.

作者： Wen, Feng Geng, Yong Liao, Mingle Wu, Baojian Lu, Liangjun Zhou, Linjie Zhou, Xingyu Qiu, Kun Chen, Jianping Key Lab of Optical Fiber Sensing and Communications Ministry of Education University of Electronic Science and Technology of China Chengdu611731 China Aston Institute of Photonic Technologies Aston University BirminghamB4 7ET United Kingdom State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

Improving crosstalk performance of Mach-Zehnder-interferometer-type optical switches is experimentally investigated by use of an all-optical multi-wavelength regenerator. Extinction ratio and bit error rate of WDM sig... 详细信息

ISBN: (纸本)9781943580347

关键词： Crosstalk

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Mapping and measuring large-scale photonic correlation with single-photon imaging

arXiv

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arXiv 2018年

作者： Sun, Ke Gao, Jun Cao, Ming-Ming Jiao, Zhi-Qiang Liu, Yu Li, Zhan-Ming Poem, Eilon Eckstein, Andreas Ren, Ruo-Jing Pang, Xiao-Ling Tang, Hao Walmsley, Ian A. Jin, Xian-Min State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei Anhui230026 China Clarendon Laboratory University of Oxford Parks Road OxfordOX1 3PU United Kingdom Department of Physics of Complex Systems Weizmann Institute of Science Rehovot7610001 Israel

Quantum correlation and its measurement are essential in exploring fundamental quantum physics problems and developing quantum enhanced technologies. Quantum correlation may be generated and manipulated in different spaces, which demands different measurement approaches corresponding to position, time, frequency and polarization of quantum particles. In addition, after early proof-of-principle demonstrations, it is of great demand to measure quantum correlation in a Hilbert space large enough for real quantum applications. When the number of modes goes up to several hundreds, it becomes economically unfeasible for single-mode addressing and also extremely challenging for processing correlation events with hardware. Here we present a general and large-scale measurement approach of Correlation on Spatially-mapped Photon-Level Image (COSPLI). The quantum correlations in other spaces are mapped into the position space and are captured by single-photon-sensitive imaging system. Synthetic methods are developed to suppress noises so that single-photon registrations can be faithfully identified in images. We eventually succeed in retrieving all the correlations with big-data technique from tens of millions of images. We demonstrate our COSPLI by measuring the joint spectrum of parametric down-conversion photons. Our approach provides an elegant way to observe the evolution results of large-scale quantum systems, representing an innovative and powerful tool added into the platform for boosting quantum information processing. Copyright © 201., The Authors. All rights reserved.

关键词： Photons

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Polarization sensitive optical coherence domain reflectometry using mode-locked laser as optical source

Polarization sensitive optical coherence domain reflectometr...

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Asia-Pacific optical Sensors Conference, APOS 201.

作者： Chen, Jin Fan, Xinyu Liu, Qingwen He, Zuyuan State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China

A polarization-sensitive optical coherence domain reflectometry using mode-locked laser as optical source is proposed and demonstrated. Thanks to the high spatial resolution, polarization changes in polarization-maint... 详细信息

ISBN: (纸本)9780960038053

关键词： Reflection

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Study of dual-polarization OQAM-OFDM PON with direct detection

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Optoelectronics Letters 2016年第1期12卷 65-68页

作者：罗清龙冯敏白成林胡卫生 Key Laboratory of Optical Communications Science & Technology in Shandong Province College of Physics Science and Information EngineeringLiaocheng University State Key Lab.of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

An offset quadrature amplitude modulation orthogonal frequency-division multiplexing(OQAM-OFDM) passive optical network(PON) architecture with direct detection is brought up to increase the transmission range and improve the system *** optical line terminal(OLT),OQAM-OFDM signals at 40 Gbit/s are transmitted as *** each optical network unit(ONU),the optical OQAM-OFDM signal is demodulated with direct *** results show that the transmission distance can exceed 20 km with negligible penalty under the experimental conditions.

关键词： Amplitude modulation Frequency division multiplexing optical fiber {1. Passive optical {1. Quadrature amplitude modulation Signal detection

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First demonstration of orbital angular momentum (OAM) distributed Raman amplifier over 1.-km OAM fiber with data- carrying OAM multiplexing and wavelength-division multiplexing

First demonstration of orbital angular momentum (OAM) distri...

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optical Fiber {1. Conference, OFC 201.

作者： Zhu, Long Li, Jiaxiong Zhu, Guoxuan Wang, Lulu Cai, Chengkun Wang, Andong Li, Shuhui Tang, Ming He, Zuyuan Yu, Siyuan Du, Cheng Luo, Wenyong Liu, Jie Du, Jiangbing Wang, Jian Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei430074 China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information Engineering Sun Yat-sen University Guangzhou China Photonics Research Group Merchant Venturers School of Engineering University of Bristol Woodland Road BristolBS8 1UB United Kingdom Fiberhome Telecommunication Technologies Co. Ltd Wuhan Hubei430074 China

We propose and demonstrate orbital angular momentum (OAM) distributed Raman amplifier over 1.-km OAM fiber with 2 OAM modes multiplexing and 1. wavelength-division multiplexing. The on-offgain of the two OAM modes are... 详细信息

ISBN: (纸本)9781943580385

关键词： Raman scattering

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Analytical coupled-wave model for photonic crystal surface-emitting quantum cascade lasers

arXiv

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arXiv 2017年

作者： Wang, Zhixin Liang, Yong Yin, Xuefan Peng, Chao Hu, Weiwei Faist, Jérôme State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing100871 China ETH Zurich Institute of Quantum Electronics Auguste-Piccard-Hof 1 Zurich8093 Switzerland

An analytical coupled-wave model is developed for surface-emitting photonic-crystal quantum cascade lasers (PhC-QCLs). This model provides an accurate and efficient analysis of full three-dimensional device structure with large-area cavity size. Various laser properties of interest including the band structure, mode frequency, cavity loss, mode intensity profile, and far field pattern (FFP), as well as their dependence on PhC structures and cavity size, are investigated. Comparison with numerical simulations confirms the accuracy and validity of our model. The calculated FFP and polarization profile well explain the previously reported experimental results. In particular, we reveal the possibility of switching the lasing modes and generating single-lobed FFP by properly tuning PhC structures. Copyright © 201., The Authors. All rights reserved.

关键词： Photonic crystals

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Light and RF dual connectivity for the next generation cellular systems

Light and RF dual connectivity for the next generation cellu...

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201. IEEE/CIC International Conference on communications in China, ICCC 201.

作者： Al-Kinani, Ahmed Wang, Cheng-Xiang Haider, Fourat Haas, Harald Zhang, Wensheng Cheng, Xiang Institute of Sensors Signals and Systems School of Engineering and Physical Sciences Heriot-Watt University EdinburghEH144AS United Kingdom Hutchison 3G UK Limited MaidenheadSL61EH United Kingdom Institute of Digital Communications School of Engineering University of Edinburgh EdinburghEH93JL United Kingdom Shandong Provincial Key Lab of Wireless Communication Technologies Shandong University Jinan Shandong250100 China State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing100871 China

ISBN: (纸本)9781538645024

Dual connectivity in long-term evolution (LTE) networks allows users to aggregate radio-frequency (RF) resources simultaneously from at least two different nodes, i.e., master eN-ode B (MeNB) and secondary eNode B (SeNB). Dual connectivity can significantly increase the per-user throughput and enhance mobility robustness. Furthermore, visible light {1.s (VLC) systems have recently attracted a considerable interest for indoor wireless {1.s. In this paper, we propose a system of which the RF spectrum is aggregated by the visible light (VL) spectrum in order to get the benefits of both spectra in cellular systems. Simulation results show that high signal-to-noise ratio (SNR) values of VLC system can enhance the average per-user throughput. The throughput is increased significantly, more than the double when aggregating two blocks of spectra, one block is from the VL spectrum and the other block from RF spectrum. Furthermore, we examine VLC illumination functionality, which is required for the proposed system model. We demonstrate that the illumination is within the standard 2001.00 lx illumination criteria. © 201. IEEE.

关键词： Visible light communication

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Ultra-compact and highly efficient polarization splitter and rotator based on a silicon bent directional coupler 42

Ultra-compact and highly efficient polarization splitter and...

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42nd European Conference on optical {1., ECOC 201.

作者： Zhang, Yong He, Yu Jiang, Xinhong Liu, Boyu Qiu, Ciyuan Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

An ultra-compact (coupling length ∼ 8.77 μm) silicon polarization splitter and rotator is demonstrated based on a bent directional coupler. The peak TM-TE coupling efficiency reaches 96.6%. The crosstalk values are ... 详细信息

ISBN: (纸本)9783800742745

关键词： Directional couplers

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Compact silicon photonic interleaver using an interfering loop containing a fabry-perot cavity formed by sagnac loop mirrors 42

Compact silicon photonic interleaver using an interfering lo...

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42nd European Conference on optical {1., ECOC 201.

作者： Jiang, Xinhong Yang, Yuxing Liu, Boyu Zhang, Yong Qiu, Ciyuan Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

A compact (1.6.4 1.; 55.1.μm2) silicon photonic interleaver is proposed and experimentally demonstrated. The 3-dB and 20-dB bandwidths of the passband are ∼1.09 nm and ∼1.585 nm, respectively. The central wavele... 详细信息

ISBN: (纸本)9783800742745

A compact (1.6.4 × 55.1.μm2) silicon photonic interleaver is proposed and experimentally demonstrated. The 3-dB and 20-dB bandwidths of the passband are ∼1.09 nm and ∼1.585 nm, respectively. The central wavelength can be changed by tuning only one waveguide. © VDE VERLAG GMBH · Berlin · Offenbach.

关键词： Silicon photonics

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