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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Muhammad Talal Ali Khan Haisu Li Nathan Nam Minh Duong Andrea Blanco-Redondo Shaghik Atakaramians School of Electrical Engineering and Telecommunications UNSW Sydney New South Wales Australia Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing China Nokia Bell Labs 791 Holmdel Rd Holmdel USA

We demonstrate an all-metallic terahertz topological waveguide using cost-effective 3D printing technique. The experimental results indicate guiding of the mode within the topological band gap in the bianisotropic med... 详细信息

ISBN: (数字)9781728143330

ISBN: (纸本)9781728152394

关键词： Three-dimensional displays Photonic band gap Waveguide lasers Three-dimensional printing Laser modes Electrooptical waveguides Electrooptic effects

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3D-Printed Terahertz Topological Waveguides

arXiv

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arXiv 2020年

作者： Ali Khan, Muhammad Talal Li, Haisu Minh Duong, Nathan Nam Blanco-Redondo, Andrea Atakaramians, Shaghik School of Electrical Engineering and Telecommunications UNSW SydneyNSW2052 Australia Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing100044 China Nokia Bell Labs 791 Holmdel Rd HolmdelNJ07733 United States

Compact and robust waveguide chips are crucial for new integrated terahertz applications, such as high-speed interconnections between processors and broadband short-range wireless communications. Progress on topological photonic crystals shows potential to improve integrated terahertz systems that suffer from high losses around sharp bends. Robust terahertz topological transport through sharp bends on a silicon chip has been recently reported over a relatively narrow bandwidth. Here, we report the experimental demonstration of topological terahertz planar air-channel metallic waveguides which can be integrated into an on-chip interconnect. Our platform can be fabricated by a simple, cost-effective technique combining 3D-printing and gold-sputtering. The relative size of the measured topological bandgap is ∼12.5%, which entails significant improvement over all-silicon terahertz topological waveguides (∼7.8%). We further demonstrate robust THz propagation around defects and delay lines. Our work provides a promising path towards compact integrated terahertz devices as a next frontier for terahertz wireless communications. Copyright © 2020, The Authors. all rights reserved.

关键词： Cost effectiveness

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LP_(01) to LP_(11) mode convertor based on side-polished small-core single-mode fiber

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Optoelectronics Letters 2018年第2期14卷 88-91页

作者：刘艳李阳李卫东 Key Lab of All Optical Network & Advanced Telecommunication Network Ministry of Education Beijing Jiaotong University Institute of Lightwave Technology Beijing Jiaotong University

An all-fiber LP_(01)-LP_(11) mode convertor based on side-polished small-core single-mode fibers(SMFs) is numerically demonstrated. The linearly polarized incident beam in one arm experiences π shift through a fiber half waveplate, and the side-polished parts merge into an equivalent twin-core fiber(TCF) which spatially shapes the incident LP_(01) modes to the LP_(11) mode supported by the step-index few-mode fiber(FMF). Optimum conditions for the highest conversion efficiency are investigated using the beam propagation method(BPM) with an approximate efficiency as high as 96.7%. The proposed scheme can operate within a wide wavelength range from 1.3 μm to1.7 μm with overall conversion efficiency greater than 95%. The effective mode area and coupling loss are also characterized in detail by finite element method(FEM).

关键词： mode convertor based on side-polished small-core single-mode fiber to LP

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A Bandwidth-Enhanced Short-Reach System Based on a Phase-Coherent Orthogonal Lightwave Generator

A Bandwidth-Enhanced Short-Reach System Based on a Phase-Coh...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Mengyao Han Muguang Wang Naihan Zhang Yuxiao Guo Qi Ding Beilei Wu Hongqian Mu Institute of Lightwave Technology Key Lab of All Optical Network & Advanced Telecommunication Network Ministry of Education Beijing Jiaotong University Beijing China

A bandwidth-enhanced short-reach system based on a simple POLG is firstly proposed and demonstrated. The experimental results show that the proposed system has a significant improvement of the BER performance over 100... 详细信息

ISBN: (纸本)9781943580705

关键词： Bit error rate Coherent communications optical components optical signals Phase modulation Signal processing

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Terahertz Waveguide: 3D-Printed Terahertz Topological Waveguides (Adv. Mater. Technol. 7/2021)

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advanced Materials Technologies 2021年第7期6卷

作者： Muhammad Talal Ali Khan Haisu Li Nathan Nam Minh Duong Andrea Blanco-Redondo Shaghik Atakaramians Shaghik's THz Group School of Electrical Engineering and Telecommunications UNSW Sydney NSW 2052 Australia Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China Nokia Bell Labs 791 Holmdel Road Holmdel NJ 07733 USA

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Terahertz Integrated Photonic Chip based on Metal/Dielectric Hybrid Waveguide

Terahertz Integrated Photonic Chip based on Metal/Dielectric...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Haisu Li Mei Xian Low Rajour Tanyi Ako Madhu Bhaskaran Sharath Sriram Withawat Withayachumnankul Boris T. Kuhlmey Shaghik Atakaramians Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing China School of Electrical Engineering and Telecommunications UNSW Sydney New South Wales Australia Functional Materials and Microsystems Research Group and the Micro Nano Research Facility RMIT University Melbourne Victoria Australia Terahertz Engineering Laboratory School of Electrical and Electronic Engineering University of Adelaide South Australia Australia The University of Sydney School of Physics and Institute of Photonics and Optical Science (IPOS) Camperdown New South Wales Australia

We present an experimental demonstration of hybrid terahertz waveguide chips for terahertz integration, which support a single-mode, low-loss and low-dispersion bandwidth over 0.367-0.411 THz. Waveguide bends can also... 详细信息

ISBN: (数字)9781728143330

ISBN: (纸本)9781728152394

关键词： Waveguide lasers Bandwidth Electrooptical waveguides Photonics

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FBG Strain sensor applied in harsh environment of aerospace 3

FBG Strain sensor applied in harsh environment of aerospace

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3rd Optoelectronics Global Conference, OGC 2018

作者： Pei, Yifei Liao, Tao Xu, Jian Lin, Heng Ning, Tigang Beijing Institute of Spacecraft Environment Engineering Beijing China School of Precision Instrument and Opto-Electronics Engineering Tianjin University Tianjin China Key Lab of All Optical Network Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing China

ISBN: (纸本)9781538673973

We have designed a novel FBG strain sensor in this paper, which is optimized for aerospace application and available in harsh environment. The proposed FBG strain sensor is improved in mechanical structure and filler for aerospace, whose characteristic is investigated by FEM simulation and experimental tests. In our design we fix the grating with special mechanical structure and metal coating to ensure the stability. We have demonstrated that developed sensor could detect the minimum strain of 0.602μϵ by experiment. Our sensor has high sensitivity and good stability and can be used for many aspects in aerospace. © 2018 IEEE.

关键词： Fiber Bragg gratings

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optical modulation format recognition for polarization-multiplexed coherent system using Chinese restaurant process 3

Optical modulation format recognition for polarization-multi...

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Real-time Photonic Measurements, Data Management, and Processing III 2018

作者： Sun, Mengji Wang, Muguang Guo, Yuxiao Mu, Hongqian Wu, Beilei Jian, Shuisheng Key Lab of All Optical Network and Advanced Telecommunication Network Ministry of Education Beijing Jiaotong University Beijing100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing100044 China

ISBN: (数字)9781510622432

ISBN: (纸本)9781510622425

In digital coherent optical receivers for various polarization-multiplexed high-order modulation formats such as BPSK, QPSK, 8PSK and 16QAM signals, we propose and investigate a blind modulation format recognition method using the Chinese Restaurant Process, a kind of Dirichlet model, which is based on the observation of samples in Stokes space. The recognition rates of different number of data points under different optical signal-to-noise ratios (OSNRs) are investigated in detail for four modulation formats. In addition, the recognition characteristics of the proposed method are compared with other format recognition methods in Stokes space. It is shown that the approach has a better performance with higher recognition rates, particularly under a lower OSNR. © Copyright 2018 SPIE.

关键词： Polarization

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Thermal poling of fibers with multi-anodes

Thermal poling of fibers with multi-anodes

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Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPPM 2018

作者： Huang, Lin An, Honglin Hayashi, Juliano G. Ren, Guobin Stefani, Alessio Fleming, Simon School of Physics The University of Sydney NSW2006 Australia Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing100044 China D TU Fotonik Department of Photonics Engineering Technical University of Denmark Kgs. LyngbyDK-2800 Denmark

We demonstrate thermal poling of fibers with ~50 and ~500 anodes. The second order nonlinearity layers are developed surrounding all the rings of wires in the ~50 anode fiber and the outer rings of the ~500 anode fibe... 详细信息

ISBN: (纸本)9781943580439

关键词： Anodes

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Optimizing network resource allocation with graph pointer neural network in large-scale AI systems

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Digital Communications and networks 2024年

作者： Peiying Zhang Yilin Li Athanasios V. Vasilakos Konstantin Igorevich Kostromitin Jianyong Zhang Mohsen Guizani Qingdao Institute of Software College of Computer Science and Technology China University of Petroleum (East China) Qingdao 266580 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an 710071 China Key Laboratory of Computing Power Network and Information Security Ministry of Education Shandong Computer Science Center (National Supercomputer Center in Jinan) Qilu University of Technology (Shandong Academy of Sciences) Jinan 250013 China Department of Networks and Communications College of Computer Science and Information Technology Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia Department of Physics of Nanoscale Systems South Ural State University Chelyabinsk 454080 the Russian Federation Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China Key Lab of All Optical Network and Advanced Telecommunication of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China Machine Learning Department Mohamed Bin Zayed University of Artificial Intelligence (MBZUAI) Abu Dhabi 999041 United Arab Emirates

For increasingly complex communication demands of large-scale AI communication systems, the Space-Air-Ground Integrated network (SAGIN) better caters to demands but also raises concerns about resource scarcity and diversity. This paper innovatively combines Graph Pointer Neural networks (GPNN) and Reinforcement Learning (RL) to enhance resource allocation efficiency. The method leverages the advantages of GPNN in handling graph data and RL in optimizing decisions in dynamic environments. It also targets the optimization goal of maximizing resource allocation while minimizing deployment latency. This paper begins by modeling SAGIN and elucidating the SAGIN logical architecture based on Software-defined networking (SDN). Subsequently, it introduces an SFC deployment algorithm aimed at joint optimization of resource allocation and latency. The algorithm leverages GPNN and RL to deploy virtual nodes and links, with the goal of optimizing resource allocation and deployment latency. Experiment findings conclusively demonstrate that the efficacy of proposed algorithm in effectively weighing limited heterogeneous resources and minimum mapping delay. Notably, when compared to three other SFC mapping algorithms MLRL, NFVdeep, and RL, the proposed algorithm consistently outperforms them, with an average improvement of 10.17% in long-term average reward/cost, 11.21% in link resource utilization ratio, 15.34% in node resource utilization ratio, and 16.38% in acceptance ratio.

关键词： Space-air-ground integrated network Topological structure Reinforcement learning Service function chain Graph pointer neural network

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