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European Conference on optical communication (ECOC)

作者： Xiang Li Ming Luo Tao Zeng Lilin Yi Jie Li Lingheng Meng Shaohua Yu State Key Laboratory Wuhan Research Institute of Posts & Telecommunications Wuhan Hubei China State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We experimentally demonstrate the first bidirectional coherent UDWDM-PON with real-time digital signal processing supporting 1000 users at a capacity of 10-Tb/s in downlink and 2-Tb/s in uplink. More than 28-dB power ... 详细信息

关键词： optical attenuators optical filters optical fibers optical transmitters optical receivers Downlink

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High-Efficiency Broadband Remote RF Signal Down-Conversion Based on Sideband optical Phase-Locked Loop

High-Efficiency Broadband Remote RF Signal Down-Conversion B...

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European Conference on optical communication (ECOC)

作者： Baiyu Li Weilin Xie Wei Wei Daming Han Jiatong Yao Yi Dong State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China School of Optics and Photonics Beijing Institute of Technology Beijing China

We present a broadband remote RF signal down-conversion based on an optical sideband phase-locked loop. High conversion efficiency, stable phase and good SFDR are achieved by using a microwave local oscillator with ha... 详细信息

关键词： optical fibers RF signals Amplitude modulation optical mixing Masers

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Non-volatile optical Switch Based on a GST-Loaded Directional Coupler

Non-volatile Optical Switch Based on a GST-Loaded Directiona...

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Optoelectronics Global Conference (OGC)

作者： Hanyu Zhang Linjie Zhou Liangjun Lu Jianping Chen B. M. A. Rahman Shanghai Institute for Advanced Communication and Data Science Shanghai Key Lab of Navigation and Location Services State Key Laboratory of Advanced Optical Communication Systems and Networks SJTU Shanghai China Department of Electrical and Electronic Engineering University of London London U.K.

We present a non-volatile optical switch based on a directional coupler comprising a silicon-Ge2Sb2Te5 (GST) hybrid waveguide. The non-volatility of GST makes it attractive for reducing static power consumption in optical switching. Experimental results show that the optical switch has an extinction ratio of >20 dB in the bar state and >25 dB in the cross state around 1578 nm wavelength. The insertion loss is 2 dB and 7 dB for the bar and cross states, respectively.

关键词： optical waveguides Silicon optical switches Directional couplers optical refraction optical variables control Photonics

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Software-defined microwave photonic filter with high reconfigurable resolution

Software-defined microwave photonic filter with high reconfi...

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OptoElectronics and communications Conference, OECC

作者： Lilin Yi Wei Wei Yves Jaouen Weisheng Hu State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Institute for Advanced Communication and Data Science Shanghai Jiao Tong University Shanghai China LTCI Télécom ParisTech Université Paris Saclay Paris France

We present an arbitrary-shaped microwave photonic filter based on stimulated Brillouin scattering in the fiber. The filter bandwidth, center frequency, and amplitude response can all be software-defined with a resolut... 详细信息

ISBN: (纸本)9781538691465

关键词： Probes Optimized production technology Integrated circuits Complexity theory network analyzers Amplitude modulation Notch filters

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The parallel Grover as dynamic system

arXiv

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arXiv 2018年

作者： Goscinski, Alexander State Key Laboratory of Advanced Optical Communication Systems and Networks Key Lab on Navigation and Location-based Service Department of Electronic Engineering Shanghai Jiaotong University Dongchuan Road 800 Shanghai200240 China

A sequential application of the Grover algorithm to solve the iterated search problem has been improved by Ozhigov [1] by parallelizing the application of the oracle. In this work a representation of the parallel Grover as dynamic system of inversion about the mean and Grover operators is given. Within this representation the parallel Grover for k = 2 can be interpreted as rotation in three-dimensional space and it can be shown that the sole application of the parallel Grover operator does not lead to a solution for k > 2. We propose a solution for k = 3 with a number of approximately 1.51√N iterations. Copyright © 2018, The Authors. All rights reserved.

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Wavelength dimensioning for wavelength-routed WDM satellite network

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Chinese Journal of Aeronautics 2016年第3期29卷 763-771页

作者： Liu Zhe Guo Wei Deng Changlin Hu Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

Internet and broadband applications driven by data traffic demand have become key dri- vers for satellite constellations. The key technology to satisfy the high capacity requirements between satellites is optical satellite networks by means of wavelength division multiplexing inter- satellite links （ISLs） with wavelength routing （WDM-OSN）. Due to the limited optical amplifier bandwidth onboard the satellite, it is important to minimize the wavelength requirements to provi- sion requests. However, ISLs should be dynamically established and deleted for each satellite according to its visible satellites. Furthermore, different link assignments will result in different topologies, hence yielding different routings and wavelength assignments. Thus, a perfect match model-based link assignment scheme （LAS-PMM） is proposed to design an appropriate topology such that shorter path could be routed and less wavelengths could be assigned for each ISL along the path. Finally, simulation results show that in comparison to the regular Manhattan street net- work （MSN） topology, wavelength requirements and average end-to-end delay based on the topol- ogy generated by LAS-PMM could be reduced by 24.8% and 12.4%, respectively.

关键词： LAS LAS-PMM Routing Wavelength assignment Wavelength dimensioning WDM-OSN

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Compact, submilliwatt, 2 × 2 silicon thermo-optic switch based on photonic crystal nanobeam cavities

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Photonics Research 2017年第2期5卷 108-112页

作者： HUANYING ZHOU CIYUAN QIU XINHONG JIANG QINGMING ZHU YU HE YONG ZHANG YIKAI SU RICHARD SOREF State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Engineering Department University of Massachusetts

We propose and experimentally demonstrate a 2×2 thermo-optic(TO) crossbar switch implemented by dual photonic crystal nanobeam(PCN)cavities within a silicon-on-insulator(SOI)*** thermally tuning the refractive index of silicon,the resonance wavelength of the PCN cavities can be *** the help of the ultrasmall mode volumes of the PCN cavities,only～0.16 mW power is needed to change the switching *** a spectral passband of 0.09 nm at the 1583.75 nm operation wavelength,the insertion loss(IL)and crosstalk(CT)performances were measured as IL(bar)=-0.2 dB,CT(bar)=-15 dB,IL(cross)=-1.5 dB,and CT(cross)=-15 ***,the thermal tuning efficiency of the fabricated device is as high as1.23 nm/mW.

关键词： PCN Compact silicon thermo-optic switch based on photonic crystal nanobeam cavities submilliwatt mode SOI

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Fabrication of depletion type micro-ring modulator with high extinction ratio and high coupling quality factor 3

Fabrication of depletion type micro-ring modulator with high...

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3rd International Conference on Mechanical, Electronic and Information Technology Engineering, ICMITE 2017

作者： Shen, Yun Wang, Xiaodong Zhang, Wei Qiu, Ciyuan Cheng, Xiulan Center for Advanced Electronic Material and Devices Shanghai Jiao Tong University Shanghai200240 China State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

We experimentally demonstrate an optical micro-ring modulator based on a reverse-biased PN junction which is integrated into a silicon-on-insulator (SOI) rib waveguide. The performance of micro-ring resonator with different sizes is simulated with Lumerical MODE Solutions. The fabricated device provides a high extinction ratio (ER) of 20 dB and coupling quality factor (Q) 2∗104. Modulation rate is higher than 11 Gbit/s with only 2 V peak-to-peak (Vpp) driving voltage. The theoretical modulation rate can be higher than 25 Gbit/s by the optimizing the matching resistor and the test system. © The Authors, published by EDP Sciences, 2017.

关键词： Fabrication

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A generalized recurrent neural architecture for text classification with multi-task learning

arXiv

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arXiv 2017年

作者： Zhang, Honglun Xiao, Liqiang Wang, Yongkun Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Network and Information Center Shanghai Jiao Tong University

Multi-task learning leverages potential correlations among related tasks to extract common features and yield performance gains. However, most previous works only consider simple or weak interactions, thereby failing to model complex correlations among three or more tasks. In this paper, we propose a multi-task learning architecture with four types of recurrent neural layers to fuse information across multiple related tasks. The architecture is structurally flexible and considers various interactions among tasks, which can be regarded as a generalized case of many previous works. Extensive experiments on five benchmark datasets for text classification show that our model can significantly improve performances of related tasks with additional information from others. Copyright © 2017, The Authors. All rights reserved.

关键词： Text processing

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Multi-task label embedding for text classification

arXiv

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arXiv 2017年

作者： Zhang, Honglun Xiao, Liqiang Chen, Wenqing Wang, Yongkun Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Network and Information Center Shanghai Jiao Tong University

Multi-task learning in text classification leverages implicit correlations among related tasks to extract common features and yield performance gains. However, most previous works treat labels of each task as independent and meaningless one-hot vectors, which cause a loss of potential information and makes it difficult for these models to jointly learn three or more tasks. In this paper, we propose Multi-Task label Embedding to convert labels in text classification into semantic vectors, thereby turning the original tasks into vector matching tasks. We implement unsupervised, supervised and semi-supervised models of Multi-Task label Embedding, all utilizing semantic correlations among tasks and making it particularly convenient to scale and transfer as more tasks are involved. Extensive experiments on five benchmark datasets for text classification show that our models can effectively improve performances of related tasks with semantic representations of labels and additional information from each other. Copyright © 2017, The Authors. All rights reserved.

关键词： Embeddings

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