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Single-shot incoherent optical processing of microwave signals： opening the path to low cost high performance analog photonics

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Science Bulletin 2017年第9期62卷 652-653页

作者： Jose Capmany iteam research institute Universitat Politecnica de Valencia Camino de Vera s/n 46022 Valencia Spain

Incoherent optical processing of microwave signals,where low-coherence broadband light sources are employed instead of costly mode locked lasers,has attracted great interest thanks to its wide applications in microwav... 详细信息

关键词： Single-shot incoherent optical processing of microwave signals:opening the path to low cost high performance analog photonics high MZM SNR mode SLD

Breakthrough on high-speed oscillation mode controlling in optoelectronic oscillator

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Science Bulletin 2018年第13期63卷 807-808页

作者： josécapmany Photonics research Labs ITEAM Research InstituteUniversitat Politecnica de ValendaCamino de Vera s/n46022 ValenciaSpain

The optoelectronic oscillator(OEO)is a hybrid electrical/photonic device that leverages on the use of a high Q-factor energy storage element,such as a long and low loss fiber delay line to generate single frequency microwave signals with ultra-low phase noise[1–8].However,a long fiber delay line results in a long mode building time associated with the cavity round trip,which makes impossible to generate a

关键词：振荡器高速度动模控制微波信号长纤维 OEO 频率

Observation of parity-time symmetry in microwave photonics

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Light(Science & Applications) 2018年第1期7卷 699-707页

作者： Yanzhong Liu Tengfei Hao Wei Li Jose Capmany Ninghua Zhu Ming Li State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Photonics research Labs ITEAM Research InstituteUniversitat Politecnica de ValenciaCamino de Vear s/n46022 ValenciaSpain

Symmetry plays a crucial role in explorations of the laws of nature.Parity-time(PT)symmetry phenomena can lead to entirely real spectra in non-Hermitian systems,which attracts considerable attention in the fields of optics and electronics because these phenomena provide a new tool for the manipulation of oscillation modes and nonreciprocal signal transmission.A potential new field of application is microwave photonics,an interdisciplinary field in which the interaction between microwaves and optical signals is exploited.In this article,we report the experimental use of PT symmetry in an optoelectronic oscillator(OEO),a key microwave photonics system that can generate singlefrequency sinusoidal signals with high spectral purity.PT symmetry is theoretically analyzed and experimentally observed in an OEO with two mutually coupled active oscillation cavities via a precise manipulation of the interplay between gain and loss in the two oscillation cavities.Stable single-frequency microwave oscillation is achieved without using any optical/electrical filters for oscillation mode selection,which is an indispensable requirement in traditional OEOs.This observation opens new avenues for signal generation and processing based on the PT symmetry principle in microwave photonics.

关键词： symmetry microwave oscillation

Recent advances in optoelectronic oscillators

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Advanced Photonics 2020年第4期2卷 4-23页

作者： Tengfei Hao Yanzhong Liu Jian Tang Qizhuang Cen Wei Li Ninghua Zhu Yitang Dai JoséCapmany Jianping Yao Ming Li Chinese Academy of Sciences Institute of SemiconductorsState Key Laboratory on Integrated OptoelectronicsBeijingChina University of Chinese Academy of Sciences School of ElectronicElectricaland Communication EngineeringBeijingChina University of Chinese Academy of Sciences Center of Materials Science and Optoelectronics EngineeringBeijingChina Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical CommunicationsBeijingChina Universitat Politécnica de Valencia ITEAM Research InstitutePhotonics Research LabsValenciaSpain University of Ottawa Microwave Photonics Research LaboratoryOttawaOntarioCanada

An optoelectronic oscillator(OEO)is a microwave photonic system that produces microwave signals with ultralow phase noise using a high-quality-factor optical energy storage element.This type of oscillator is desired in various practical applications,such as communication links,signal processing,radar,metrology,radio astronomy,and reference clock distribution.Recently,new mode control and selection methods based on Fourier domain mode-locking and parity-time symmetry have been proposed and experimentally demonstrated in OEOs,which overcomes the long-existing mode building time and mode selection problems in a traditional OEO.Due to these mode control and selection methods,continuously chirped microwave waveforms can be generated directly from the OEO cavity and single-mode operation can be achieved without the need of ultranarrowband filters,which are not possible in a traditional OEO.Integrated OEOs with a compact size and low power consumption have also been demonstrated,which are key steps toward a new generation of compact and versatile OEOs for demanding applications.We review recent progress in the field of OEOs,with particular attention to new mode control and selection methods,as well as chip-scale integration of OEOs.

关键词： optoelectronic oscillator microwave photonics Fourier domain mode-locking parity-time symmetry photonics integrated circuits

Silicon photonics phase and intensity modulators for flat frequency comb generation

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Photonics research 2021年第10期9卷 2068-2076页

作者： LUCAS DENIEL ERWAN WECKENMANN DIEGO PÉREZ GALACHO CHRISTIAN LAFFORGUE STÉPHANE MONFRAY CARLOS ALONSO-RAMOS LAURENT BRAMERIE FRÉDÉRIC BOEUF LAURENT VIVEN DELPHINE MARRIS-MORINI Univ.Paris-Saclay CNRSCentre for Nanosciences and Nanotechnologies91120 PalaiseauFrance Univ.Rennes CNRSFOTON-UMR 6082F-22305 LannionFrance ST Microelectronics 850 rue Jean Monnet38920 CrollesFrance Current address:iteam research institute Universitat Politècnica de ValènciaSpain

Flat electro-optical frequency combs play an important role in a wide range of applications,such as metrology,spectroscopy,or microwave photonics.As a key technology for the integration of optical circuits,silicon photonics could benefit from on-chip,tunable,flat frequency comb generators.In this article,two different architectures based on silicon modulators are studied for this purpose.They rely on a time to frequency conversion principle to shape the comb envelope.Using a numerical model of the silicon traveling-wave phase modulators,their driving schemes are optimized before their performances are simulated and compared.A total of nine lines could be obtained within a 2 dB flatness,with a line-spacing ranging from 0.1 to 7 GHz.Since this tunability is a major asset of electro-optical frequency combs,the effect of segmenting the phase modulators is finally investigated,showing that the flat lines spacing could be extended up to 39 GHz by this method.

关键词： phase spacing metrology

基于匹配滤波解调的多芯Bragg光栅曲率传感器

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光学学报 2018年第3期38卷 172-177页

作者：郑狄潘炜 Sales Salvador 西南交通大学信息科学与技术学院四川成都611756 iteam research institute Universitat Politècnica de València

设计了一种多芯光纤Bragg光栅曲率传感器,并采用匹配滤波技术实现曲率解调。多芯光纤Bragg光栅曲率传感器是通过在多芯光纤的两个中心对称纤芯中写入Bragg光栅实现的。两个光纤Bragg光栅具有相似的反射谱和中心波长,当多芯光纤发生弯曲... 详细信息

设计了一种多芯光纤Bragg光栅曲率传感器,并采用匹配滤波技术实现曲率解调。多芯光纤Bragg光栅曲率传感器是通过在多芯光纤的两个中心对称纤芯中写入Bragg光栅实现的。两个光纤Bragg光栅具有相似的反射谱和中心波长,当多芯光纤发生弯曲时,两个光纤Bragg光栅的反射谱叠加区域将发生改变。将两个光纤Bragg光栅构造成匹配滤波模式,则两个光纤Bragg光栅反射谱的叠加区域面积决定了输出信号的光强,而叠加区域的面积与光纤曲率有关。因此,通过测量匹配滤波信号的功率可以实现曲率解调。结果表明,匹配滤波技术能有效解调多芯光纤Bragg光栅曲率传感器,最大曲率解调灵敏度为0.78mW·m^(-1)。此外,测量了多芯光纤Bragg光栅曲率传感器在不同轴向应变和环境温度下的解调性能,结果表明,该曲率解调系统具有很强的抵抗外界环境波动的能力。

关键词：传感器曲率传感匹配滤波解调多芯光纤布拉格光栅

Introduction to the Microwave Photonics feature issue

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Photonics research 2014年第4期2卷 86-86页

作者： Jianping Yao Kun Xu José Capmany School of Electrical Engineering University of OttawaOttawaOntario K1N 6N5Canada Beijing University of Posts and Telecommunications BeijingChina iteam research institute Universitat Politécnica de ValenciaCamino de Vera s/n46022 ValenciaSpain

Microwave photonics is a field that studies the interaction between microwave and optical waves for the generation,processing,control,and distribution of microwave signals by means of photonics.The key advantages of using photonics for microwave applications include wide bandwidth,low loss,and large tunability.In addition,the distribution of microwave signals over optical fibers can avoid a serious problem,electromagnetic interferences,especially in an electromagnetic-complex environment.The intention of this feature issue is to provide participants in the 2013 Asia Communications and Photonics Conference(ACP2013)with an opportunity to publish an account of their microwave photonics research as a peer-reviewed archival paper.

关键词： Microwave microwave fibers

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基于微波光子的光纤传感解调技术(特邀)

光通信研究 2018年第6期6期(14)卷 21-30页

作者：郑狄邹喜华潘炜 Sales Salvador 西南交通大学信息科学与技术学院成都611756 瓦伦西亚理工大学iteam研究所西班牙瓦伦西亚46022

光纤传感器因其具有抗电磁干扰、耐腐蚀、质量轻、体积小、精度高和易于复用等诸多优点,已广泛应用于航空航天、石油化工、电子电力、土木工程和生物医药等领域。传统的光纤传感解调技术存在精度低、速度慢和稳定性差等缺点。为解决此问... 详细信息

光纤传感器因其具有抗电磁干扰、耐腐蚀、质量轻、体积小、精度高和易于复用等诸多优点,已广泛应用于航空航天、石油化工、电子电力、土木工程和生物医药等领域。传统的光纤传感解调技术存在精度低、速度慢和稳定性差等缺点。为解决此问题,近年来,基于微波光子学的传感与解调技术引起了科研人员的广泛关注。文章系统地回顾了基于微波光子学的光纤传感解调技术的研究进展,介绍了多种微波光子传感解调方案及其工作原理,并对未来的研究和发展方向进行了探讨。

关键词：微波光子技术光纤传感传感解调技术