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Photonic radio frequency channelizers based on Kerr optical micro-combs

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Journal of Semiconductors 2021年第4期42卷 17-32页

作者： Mengxi Tan Xingyuan Xu Jiayang Wu Thach G.Nguyen Sai T.Chu Brent E.Little Roberto Morandotti arnan mitchell David J.Moss Optical Sciences Centre Swinburne University of TechnologyHawthornVIC 3122Australia Electro-Photonics Laboratory Department of Electrical and Computer Systems EngineeringMonash UniversityVIC3800Australia School of Engineering RMIT UniversityMelbourneVIC 3001Australia Department of Physics City University of Hong KongHong KongChina State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision MechanicsChinese Academy of ScienceXi'an 710119China INRS-Énergie Matériaux et Télécommunications1650 Boulevard Lionel-BouletVarennesQuébecJ3X 1S2Canada Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

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 200 and 49 *** approach to realizing RF channelizers offers reduced complexity,size,and potential cost for a wide range of applications to microwave signal detection.

关键词： microwave photonic signal channelization integrated optical frequency comb

Orthogonally polarized RF optical single sideband generation with integrated ring resonators

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Journal of Semiconductors 2021年第4期42卷 53-66页

作者： Mengxi Tan Xingyuan Xu Jiayang Wu Thach G.Nguyen Sai T.Chu Brent E.Little arnan mitchell Roberto Morandotti David J.Moss Optical Sciences Centre Swinburne University of TechnologyHawthornVIC 3122Australia Electro-Photonics Laboratory Department of Electrical and Computer Systems EngineeringMonash UniversityVIC3800Australia School of Engineering RMIT UniversityMelbourneVIC 3001Australia Department of Physics City University of Hong KongHong KongChina State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision MechanicsChinese Academy of ScienceXi'an 710119China INRS-Énergie Matériaux et Télécommunications1650 Boulevard Lionel-BouletVarennesQuébecJ3X 1S2Canada Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

We review recent work on narrowband orthogonally polarized optical RF single sideband generators as well as dualchannel equalization,both based on high-Q integrated ring *** devices operate in the optical telecommunications C-band and enable RF operation over a range of either fixed or thermally tuneable *** operate via TE/TM mode birefringence in the *** 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.

关键词： microwave photonics micro-ring resonators radio frequency

Spatio-temporal isolator in lithium niobate on insulator

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Opto-Electronic Science 2023年第3期2卷 1-6页

作者： Haijin Huang Armandas Balčytis Aditya Dubey Andreas Boes Thach GNguyen Guanghui Ren Mengxi Tan arnan mitchell Integrated Photonics and Applications Centre School of EngineeringRMIT UniversityMelbourne VIC 3001Australia School of Electrical and Electronic Engineering The University of AdelaideAdelaide SA 5005Australia Institute for Photonics and Advanced Sensing The University of AdelaideAdelaide SA 5005Australia

In this contribution,we simulate,design,and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide *** used two cascaded travelling wave phase modulators for spatiotemporal modulation and a racetrack resonator as a wavelength filter to suppress the sidebands of the reverse propagating *** enabled us to achieve an isolation of 27 *** demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on the insulator waveguide platform.

关键词： Isolator lithium niobate modulator

Photonic microwave true time delays for phased array antennas using a 49 GHz FSR integrated optical micro-comb source[Invited]

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Photonics Research 2018年第5期6卷 I0055-I0061页

作者： XINGYUAN Xu JIAYANG Wu THACH G.NGUYEN TANIA MOEIN SAI T.CHU BRENT E.LITTLE ROBERTO MORANDOTTI arnan mitchell DAVID J.Moss Centre for Micro-Photonics Swinburne University of TechnologyHawthornVlC 3122Australia ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems(CUDOS) RMIT UniversityMelbourneVIC 3001Australia Department of Physics and Material Science City University of Hong KongTat Chee AvenueHong KongChina State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi'an 710119China INRS-Energie Materiaux et Telecommunications1650 Boulevard Lionel-BouletVarennesQuebec J3X 1S2Canada National Research University of Information Technologies Mechanics and OpticsSt.PetersburgRussia Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectral range(FSR) of 49 GHz, resulting in an unprecedented record high channel number(81 over the C band)—the highest number of channels for an integrated comb source used for microwave signal processing. We theoretically analyze the performance of a phased array antenna and show that this large channel count results in a high angular resolution and wide beam-steering tunable range. This demonstrates the feasibility of our approach as a competitive solution toward implementing integrated photonic true time delays in radar and communications systems.

关键词： Photonic microwave true time delays for phased array antennas a 49 GHz FSR integrated optical micro-comb source

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基于超表面实现波长选择性波前整形（英文）

Frontiers of Information Technology & Electronic Engineering 2023年第4期24卷 617-626页

作者：蔡子信何欣刘鑫涂世杰孙昕婕 Paul BECKETT Aditya DUBEY arnan mitchell 任光辉刘旭郝翔浙江大学光电科学与工程学院现代光学仪器国家重点实验室皇家墨尔本理工大学工程学院皇家墨尔本理工大学集成光子与应用中心浙江大学嘉兴研究院智能光电创新中心嘉兴市光电传感与智能成像重点实验室

精确的、与波长相关的相位调制在许多领域中是必不可少的，比如超分辨成像、全彩色全息、微纳加工以及光通讯。这一要求很难通过单一的传统光学元件实现，一般需要使用多个光学元件组合完成。本文提出一种可以实现波长选择性波前整形的... 详细信息

精确的、与波长相关的相位调制在许多领域中是必不可少的，比如超分辨成像、全彩色全息、微纳加工以及光通讯。这一要求很难通过单一的传统光学元件实现，一般需要使用多个光学元件组合完成。本文提出一种可以实现波长选择性波前整形的超表面设计方法。具体来说，本文设计了一种超表面，它能够对785nm波长的光做涡旋相位调制，同时不影响590nm波长的光保持原有相位分布。本文通过干涉仪以及对应点扩散函数的测量来验证不同波长下的波前分布。与已提出的空间复用方式以及色散工程的方法相比，我们提出的设计方法更加直接，优化难度小，适用于需要波长选择性编码的光学系统。本文所提平面光学器件对于需要波长选择性编码的光学系统具有重要应用意义。

关键词：超表面波长选择性涡旋光波前整形

Direct characterization of a nonlinear photonic circuit’s wave function with laser light

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Light(Science & Applications) 2018年第1期7卷 1082-1086页

作者： Francesco Lenzini Alexander N Poddubny James Titchener Paul Fisher Andreas Boes Sachin Kasture Ben Haylock Matteo Villa arnan mitchell Alexander S Solntsev Andrey A Sukhorukov Mirko Lobino Centre for Quantum Dynamics Griffith UniversityBrisbaneQLD 4111Australia Nonlinear Physics Centre Research School of Physics and EngineeringAustralian National UniversityCanberraACT 2601Australia ITMO University Saint Petersburg 197101Russia Ioffe Institute Saint Petersburg 194021Russia School of Engineering RMIT UniversityMelbourneVIC 3000Australia School of Mathematical and Physical Sciences University of Technology SydneyUltimoNSW 2007Australia Queensland Micro-and Nanotechnology Centre Griffith UniversityBrisbaneQLD 4111Australia

Integrated photonics is a leading platform for quantum technologies including nonclassical state generation1–4,demonstration of quantum computational complexity5 and secure quantum *** photonic circuits grow in complexity,full quantum tomography becomes impractical,and therefore an efficient method for their characterization7,8 is *** we propose and demonstrate a fast,reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical *** establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light,we overcome the limitations of previous approaches for lossy multimode devices9,*** applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31%fidelity between classical and quantum *** technique enables fast and precise evaluation of nonlinear quantum photonic networks,a crucial step towards complex,largescale,device production.

关键词： quantum nonlinear characterization

Correspondence:Wavelength-selective wavefront shaping by metasurface

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Frontiers of Information Technology & Electronic Engineering 2023年第4期24卷 617-625页

作者： Zixin CAIS Xin HE Xin LIU Shijie TU Xinjie SUN Paul BECKETT Aditya DUBEY arnan mitchell Guanghui REN Xu LIU Xiang HAO State Key Laboratory of Modern Optical Instrumentation College of Optical Science and TechnologyZhejiang UniversityHangzhou 310027China School of Engineering RMIT UniversityMelbourne 3000Australia Integrated Photonics and Applications Centre(InPAC) RMIT UniversityMelbourne 3001Australia Intelligent Optics&Photonics Research Center Jiaxing Research Institute Zhejiang UniversityJiaxing 314000China Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Jiaxing 314000China

Precise,wavelength-dependent phase retarding is essential in many fields,such as superresolution imaging,full-color holography,nanomanufacturing,and optical *** demand can be achieved by a combination of multiple optical devices but is challenging to implement using a single *** this paper,we develop a method for metasurface design that allows wavelength-selective wavefront ***,we demonstrate a metasurface that can selectively modulate a beam with a spiral phase at 785 nm and leave another beam unaffected at 590 nm.

关键词： element beam surface

Monoamine Oxidase-B Inhibitor Rasagiline Effects on Motor and Non-Motor Symptoms in Individuals with Parkinson’s Disease: A Systematic Review and Meta-Analysis

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Advances in Parkinson's Disease 2024年第3期13卷 27-56页

作者： Paula Abola mitchell Wolden Department of Clinical Research University of Jamestown Jamestown United States of America

Objective: In the manuscript titled Monoamine Oxidase-B Inhibitor Rasagiline Effects on Motor and Non-Motor Symptoms in Individuals with Parkinsons Disease: A Systematic Review and Meta-Analysis, the objective was to conduct a systematic review with meta-analysis to investigate the effects that Rasagiline has on motor and non-motor symptoms in individuals with PD. Introduction: Rasagiline is a second-generation monoamine oxidase-B (MAO-B) inhibitor used both as monotherapy and adjunctive therapy for Parkinsons Disease (PD). Methods: A systematic literature search and meta-analysis were performed with randomized control trials that investigated the effects of Rasagiline on motor and non-motor symptoms in individuals with PD. The systematic search was conducted in PubMed, Cochrane, and EBSCO databases. Methodological quality was assessed using the Cochrane Grading Recommendations Assessment, Development and Evaluation approach. Results: Fourteen studies were included in our review. There were trivial to small and statistically significant improvements in motor symptoms for individuals with PD treated with Rasagiline compared to placebo. Non-motor symptoms showed no significant improvement with Rasagiline compared to placebo in five of six meta-analyses. Results were based on very low to moderate certainty of evidence. Conclusion: 1 mg/day Rasagiline significantly improved Parkinsonian motor symptoms in individuals with PD compared with placebo. For all outcomes, the 1 mg/day Rasagiline group was favored over the placebo group.

关键词： Parkinson’s Disease Monoamine Oxidase-B Inhibitor Rasagiline Non-Motor Symptoms Motor Symptoms UPDRS PDQ-39 OFF Time

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Digital Empowerment

ChinAfrica 2024年第7期16卷 14-15页

作者： EHIZUELEN MICHAEL mitchell OMORUYI Centre for Nigerian Studies Institute of African StudiesZhejiang Normal University

How China’s tech cooperation with Africa is boosting the continent’s industrial modernisation Given the rate at which youth population in numerous African countries is growing,the continent promises to emerge as a major consumption market in the coming *** than 70 percent of Africa’s population is under the age of 35,and by 2030,42 percent of the world’s young people are expected to reside on the continent.

关键词： boosting Africa cooperation