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TechRxiv 2021年

作者： Tan, Mengxi Xu, Xingyuan Wu, Jiayang Moss, David J. Optical Sciences Centre Swinburne University of Technology HawthornVIC3122 Australia Electro-Photonics Laboratory Dept. of Electrical and Computer Systems Engineering Monash University Australia

Integrated Kerr micro-combs are a powerful source of multiple wavelength channels for photonic radio frequency (RF) and microwave signal processing, particularly for transversal filter systems. They offer significant advantages featuring a compact device footprint, high versatility, large numbers of wavelengths, and wide Nyquist bands. We review progress photonic RF and microwave high bandwidth temporal signal processing based on Kerr micro-combs with comb spacings from 49GHz to 200GHz. We focus on integral and fractional Hilbert transforms, differentiators as well as integrators. The future potential of optical micro-combs for RF photonic applications in terms of functionality and ability to realize integrated solutions is also discussed. © 2021, CC BY.

关键词： Microwaves

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Photonic RF and microwave fractional differentiation, integration, and Hilbert transforms with Kerr optical micro-combs

Research Square

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Research Square 2021年

作者： Tan, Mengxi Xu, Xingyuan Moss, David Optical Sciences Centre Swinburne University of Technology HawthornVIC3122 Australia Electro-Photonics Laboratory Dept. of Electrical and Computer Systems Engineering Monash University Australia

Integrated Kerr micro-combs are a powerful source of multiple wavelength channels for photonic radio frequency (RF) and microwave signal processing, particularly for transversal filter systems. They offer significant advantages featuring a compact device footprint, high versatility, large numbers of wavelengths, and wide Nyquist bands. We present our recent progress on photonic RF and microwave high bandwidth temporal signal processing based on Kerr micro-combs with comb spacings from 49GHz to 200GHz. We focus on integral and fractional Hilbert transforms, differentiators as well as integrators. The future potential of optical micro-combs for RF photonic applications in terms of functionality and ability to realize integrated solutions is also discussed. © 2021, CC BY.

关键词： Microwaves

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Comparison of optimal power flow formulations in active distribution grids 12

Comparison of optimal power flow formulations in active dist...

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12th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, MEDPOWER 2020

作者： Mylonas, Costas Karagiannopoulos, Stavros Aristidou, Petros Shchetinin, Dmitry Hug, Gabriela Power Systems Laboratory ETH Zurich Zurich8092 Switzerland Dept. of Electrical Engineering Computer Engineering and Informatics Cyprus University of Technology Limassol3036 Cyprus ABB Corporate Research Center Baden5405 Switzerland

ISBN: (纸本)9781839535635

Active Distribution Networks (DNs) are expected to host an increasing number of Distributed Generators (DGs) and other Distributed Energy Resources (DERs), offering new flexible sources and enabling the provision of ancillary services to system operators. Centralized DER controls that use Optimal Power Flow (OPF) methods necessitate tractable and scalable computational tools that can handle large DNs with satisfactory performance. In this paper, we compare an iterative OPF method against the standard exact AC OPF calculations in terms of the computational effort and solution quality. Furthermore, we highlight the suitability of the selected formulation to offer voltage support (VS) as an ancillary service to the transmission network. The results are demonstrated using a combination of a medium and low voltage grid, and show that tractable OPF formulations can unlock financial business cases for DNs that can actively participate in VS schemes. © 2020 Institution of engineering and Technology. All rights reserved.

关键词： Acoustic generators

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Model Predictive Control of a Vehicle using Koopman Operator

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IFAC-PapersOnLine 2020年第2期53卷 4228-4233页

作者： Vít Cibulka Tomáš Haniš Milan Korda Martin Hromčík Dept. of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague The Czech Republic CNRS Laboratory for Analysis and Architecture of SystemsToulouse France

This paper continues in the work from Cibulka et al. (2019) where a nonlinear vehicle model was approximated in a purely data-driven manner by a linear predictor of higher order, namely the Koopman operator. The vehicle system typically features a lot of nonlinearities such as rigid-body dynamics, coordinate system transformations and most importantly the tire. These nonlinearities are approximated in a predefined subset of the state-space by the linear Koopman operator and used for a linear Model Predictive Control (MPC) design in the high-dimension state space where the nonlinear system dynamics evolve linearly. The result is a nonlinear MPC designed by linear methodologies. It is demonstrated that the Koopman-based controller is able to recover from a very unusual state of the vehicle where all the aforementioned nonlinearities are dominant. The controller is compared with a controller based on a classic local linearization and shortcomings of this approach are discussed.

关键词： Koopman operator Eigenfunction Eigenvalues Basis functions Data-driven methods Model Predictive Control

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A Roadmap on Optics for Terawatt Scale Photovoltaics

A Roadmap on Optics for Terawatt Scale Photovoltaics

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2024 Solar Energy and Light-Emitting Devices, SOLED 2024

作者： Jäger, Klaus Burger, Sven Aeberhard, Urs Llado, Esther Alarcon Bläsi, Benedikt Ehrler, Bruno Favre, Wilfried Fejfar, Antonín Gageot, Tristan Gordon, Ivan Helmers, Henning Höhn, Oliver Isabella, Olindo Jošt, Marko Ledinský, Martin Mandal, Jyotirmoy Manley, Phillip Munoz, Delfina Lizcano, Juan Camilo Ortiz Paetzold, Ulrich W. Raman, Aaswath P. Sai, Hitoshi Saive, Rebecca Schmid, Martina Yablonovitch, Eli Becker, Christiane Dept. Optics for Solar Energy Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Kekuléstraße 5 Berlin12489 Germany Computational Nano Optics Zuse Institute Berlin Takustraße 7 Berlin14195 Germany JCMwave GmbH Bolivarallee 22 Berlin14050 Germany Fluxim AG Katharina-Sulzer-Platz 2 Winterthur8400 Switzerland AMOLF Science Park 104 Amsterdam1098 XG Netherlands Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstraße 2 Freiburg79100 Germany CEA-INES LITEN 50 Avenue du Lac Léman Le Bourget-du-Lac73375 France FZU - Institute of Physics of the Czech Academy of Sciences Na Slovance 1999/2 Prague 8182 00 Czech Republic IMEC Kapeldreef 75 Leuven3001 Belgium Photovoltaic Materials and Devices Laboratory Delft University of Technology Mekelweg 4 Delft2628 CD Netherlands Faculty of Electrical Engineering University of Ljubljana Tržaška 25 Ljubljana1000 Slovenia Dept. of Civil and Environmental Engineering Princeton University E209A Engineering Quadrangle PrincetonNJ08544 United States Institute of Microstructure Technology Karlsruhe Institute of Technology Eggenstein-Leopoldshafen76344 Germany Light Technology Institute Karlsruhe Institute of Technology Karlsruhe76131 Germany Dept. of Materials Science and Engineering University of California Los Angeles Los AngelesCA90024 United States Ibaraki Tsukuba305-8568 Japan MESA+ Institute for Nanotechnology Inorganic Materials Science University of Twente Enschede7522 Netherlands University of Duisburg-Essen Forsthausweg 2 Duisburg47057 Germany Dept. of Electrical Engineering and Computer Sciences University of California Berkeley BerkeleyCA94720 United States

The ongoing development of photovoltaics into terawatt scale poses a number of challenges where the optics and photonics communities can contribute. An international consortium recently compiled a roadmap that elabora...

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Photonic microwave and RF channelizers using kerr micro-combs

arXiv

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arXiv 2021年

作者： Tan, Mengxi Xu, Xingyuan Moss, David J. Optical Sciences Centre Swinburne University of Technology HawthornVIC3122 Australia Electro-Photonics Laboratory Dept. of Electrical and Computer Systems Engineering Monash University VIC3800 Australia

We review recent work on broadband RF channelizers based on integrated optical frequency Kerr micro-combs combined with passive micro-ring resonator filters, with microcombs having channel spacings of 200GHz and 49GHz. This approach to realizing RF channelizers offers reduced complexity, size, and potential cost for a wide range of applications to microwave signal detection. © 2021, CC BY.

关键词： Optical materials

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Spectroscopic detection of pigments in tissues: correlation with tissue aging and cancer development

Spectroscopic detection of pigments in tissues: correlation ...

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2022 International Conference Laser Optics, ICLO 2022

作者： Oliveira, L.M. Goncalves, T.M. Botelho, A.R. Martins, I.S. Silva, H.F. Carneiro, I. Carvalho, S. Henrique, R. Tuchin, V.V. Porto Portugal Center of Innovation in Engineering and Industrial Technology Isep Porto Portugal Department of Electrical and Computer Engineering Porto University-School of Engineering Porto Portugal Department of Pathology and Cancer Biology and Epigenetics Group Portuguese Oncology Institute of Porto Porto Portugal Porto Portugal Viana do Castelo Portugal Dept. of Pathol. and Molecular Immunology Porto University-Institute of Biomedical Sciences Abel Salazar Porto Portugal Science Medical Center Saratov State University Saratov Russia Laboratory of Laser Molecular Imaging and Machine Learning National Research Tomsk State University Tomsk Russia Laboratory of Laser Diagnostics of Technical and Living Systems Institute of Precision Mechanics and Control Frc-Saratov Scientific Centre-of the Russian Academy of Sciences Saratov Russia

ISBN: (纸本)9781665466646

The direct calculation of the absorption coefficient spectra of various tissues from spectral measurements allowed to retrieve the contents of melanin and lipofuscin. In the rabbit brain cortex, 1.8 times higher melanin content is explained by the neuron degeneration process. Similar melanin and lipofuscin contents were found in the rabbit pancreas as a result of the tissue aging process. The conversion of 83 % of the melanin in the human normal kidney into lipofuscin in the cancer kidney indicates that lipofuscin can be considered a kidney cancer marker in humans. © 2022 IEEE.

关键词： Tissue

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Photonic orthogonally polarized RF and microwave equalizers and single sideband generator

Research Square

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Research Square 2021年

We report narrowband orthogonally polarized optical RF single sideband generators as well as dual-channel RF equalization, both based on high-Q integrated ring resonators. The devices operate in the optical telecommunications C-band and enable RF operation over a range of either fixed or thermally tunable frequencies. They operate via TE/TM mode birefringence in the resonator. We achieve a very large dynamic tuning range of over 55 dB for both the optical carrier-to-sideband ratio and the dual-channel RF equalization for both the fixed and tunable devices. © 2021, CC BY.

关键词： Equalizers

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Maximizing the Accuracy of Microcomb-Based Microwave Photonic Transversal Signal Processors

Maximizing the Accuracy of Microcomb-Based Microwave Photoni...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Yang Sun Jiayang Wu Yang Li Guanghui Ren Mengxi Tan Xingyuan Xu Bill Corcoran Sai Tak Chu Brent E. Little Roberto Morandotti Arnan Mitchell David J. Moss Optical Sciences Centre Swinburne University of Technology Hawthorn Victoria Australia Integrated Photonics and Applications Centre School of Engineering RMIT University Melbourne Victoria Australia School of Electronic and Information Engineering Beihang University Beijing China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China Dept. Electrical and Computer Systems Engineering Photonic Communications Laboratory Monash University Clayton VIC Australia Department of Physics City University of Hong Kong Hong Kong QXP Technology Inc. Xi'an China INRS - Énergie Matériaux et Télécommunications Varennes QC Canada

We experimentally implement microcomb-based microwave photonic transversal signal processors and test their accuracy for differentiation, integration, and Hilbert transform. A global picture quantifying the impact of ... 详细信息

ISBN: (纸本)9798350369311

关键词： Program processors Accuracy Masers Transforms Microwave photonics Electro-optical waveguides

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Feedback control in RF photonic transversal filter systems based on optical microcombs

Feedback control in RF photonic transversal filter systems b...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Yang Li Jiayang Wu Yang Sun Guanghui Ren Mengxi Tan Xingyuan Xu Bill Corcoran Sai Tak Chu Brent E. Little Roberto Morandotti Arnan Mitchell David J. Moss Optical Sciences Centre Swinburne University of Technology Hawthorn Victoria Australia Integrated Photonics and Applications Centre School of Engineering RMIT University Melbourne Victoria Australia School of Electronic and Information Engineering Beihang University Beijing China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China Dept. Electrical and Computer Systems Engineering Photonic Communications Laboratory Monash University Clayton VIC Australia Department of Physics City University of Hong Kong Hong Kong QXP Technology Inc. Xi'an China INRS -Énergie Matériaux et Télécommunications Varennes QC Canada

We propose and experimentally demonstrate four different feedback control methods employed in microcomb-based RF photonic transversal filter systems to enhance their accuracy and stability. Detailed characterizations ... 详细信息

ISBN: (纸本)9798350369311

关键词： Optical filters Integrated optics Radio frequency Optical feedback Laser feedback Laser stability Transversal filters Feedback control Nonlinear optics Photonics

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