检索结果-南通市图书馆

Optical length-change measurement based on an incoherent single-bandpass microwave photonic filter with high resolution

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2014年第4期2卷 35-39页

作者： Ye Deng Ming Li Ningbo Huang Hui Wang ninghua zhu State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

An optical length-change measurement technique is proposed based on an incoherent microwave photonic filter(MPF).The optical length under testing is inserted into an optical link of a single-bandpass MPF based on a polarization-processed incoherent light *** key feature of the proposed technique is to transfer the length measurement in the optical domain to the electrical *** the electrical domain,the measurement resolution is extremely high thanks to the high-resolution measurement of microwave frequency *** addition,since the MPF is a single-bandpass MPF,the optical length is uniquely determined by the central frequency of the MPF.A detailed investigation of the relation between the center frequency of the MPF and the optical length change is implemented.A measurement experiment is also demonstrated,and the experimental results show that the proposed technique has a measurement sensitivity of 1 GHz/mm with a high length-measurement resolution of 1 pm in *** proposed approach has the advantages of high sensitivity,high resolution,and immunity to power variation in electronic and optical links.

关键词： filter polarization microwave

Selectable infiltrating large hollow core photonic band-gap fiber

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第21期58卷 2606-2610页

作者： LIU JianGuo DU YuanXin zhu ninghua LIU FengMei State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Haidian Maternal & Child Health Hospital

A selectable infiltrating large hollow core photonic band-gap fiber is fabricated with simple arc discharge technique. The offset, discharge duration, arc current and discharge times are optimized for selected sealing side air-holes but leave the central large air-hole partially open. The collapse length of the PCF is shortened by increasing the number of discharges and offset with discharge duration and arc current kept at a relatively low level. Light with the wavelength located at the photonic band-gap can still propagate while the central hollow air-hole is infiltrated with a kind of oil with refractive index of 1.30. The selectable infiltrating large hollow core photonic band-gap fiber has potential application for implementing novel lasers, sensors and tunable optoelectronic devices.

关键词：光子带隙光纤空芯渗透放电技术电弧电流光子晶体光纤放电时间光子学器件

Optoelectronic parametric oscillator

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2020年第1期9卷 1028-1037页

作者： Tengfei Hao Qizhuang Cen Shanhong Guan Wei Li Yitang Dai 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 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

Oscillators are one of the key elements in various applications as a signal source to generate periodic *** them,an optical parametric oscillator(OPO)is a driven harmonic oscillator based on parametric frequency conversion in an optical cavity,which has been widely investigated as a coherent light source with an extremely wide wavelength tuning ***,steady oscillation in an OPO is confined by the cavity delay,which leads to difficulty in frequency tuning,and the frequency tuning is discrete with the minimum tuning step determined by the cavity ***,we propose and demonstrate a counterpart of an OPO in the optoelectronic domain,i.e.,an optoelectronic parametric oscillator(OEPO)based on parametric frequency conversion in an optoelectronic cavity to generate microwave *** to the unique energy-transition process in the optoelectronic cavity,the phase evolution in the OEPO is not linear,leading to steady single-mode oscillation or multimode oscillation that is not bounded by the cavity ***,the multimode oscillation in the OEPO is stable and easy to realize owing to the phase control of the parametric frequency-conversion process in the optoelectronic cavity,while stable multimode oscillation is difficult to achieve in conventional oscillators such as an optoelectronic oscillator(OEO)or an OPO due to the mode-hopping and mode-competition *** proposed OEPO has great potential in applications such as microwave signal generation,oscillator-based computation,and radio-frequency phase-stable transfer.

关键词： effect oscillator parametric

A selective area growth double stack active layer electroabsorption modulator integrated with a distributed feedback laser

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2009年第20期54卷 3627-3632页

作者： zhu HongLiang LIANG Song ZHAO Ling Juan KONG DuanHua zhu ninghua WANG Wei Key Laboratory of Semiconductor Materials Institute of Semiconductor Chinese Academy of Sciences Beijing 100083 China

A new method for fabricating electroabsorption modulator integrated with a distributed feedback laser(EML) was *** the method we fabricated a selective area growth double stack active layer EML(SAG-DSAL-EML).Through comparing with other fabrication methods of EMLs,the characters and the merits of the new method presented in this paper were discussed.

关键词：分布反馈激光器电吸收调制器选择区域生长有源层集成堆积 EML 制备方法

Observation of parity-time symmetry in microwave photonics

在线全文

学校读者我要写书评

暂无评论

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 ***-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 *** 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 *** 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 *** single-frequency microwave oscillation is achieved without using any optical/electrical filters for oscillation mode selection,which is an indispensable requirement in traditional *** observation opens new avenues for signal generation and processing based on the PT symmetry principle in microwave photonics.

关键词： symmetry microwave oscillation

Serial time-encoded amplified microscopy for ultrafast imaging based on multi-wavelength laser

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2014年第22期59卷 2693-2701页

作者： Ye Deng Ming Li Ningbo Huang JosAzana ninghua zhu State Key Laboratory on Integrated Optoelectronics Chinese Academy of Sciences Institute National de la Recherche Scientifique-nergie Matriaux et Tlcommunications (INRS-EMT) VarennesQubec J3X 1S2 Canada

In this paper,a serial time-encoded amplified microscopy(STEAM)by employing a multi-wavelength laser as the light source is proposed and experimentally *** system achieves ultrafast optical imaging with a tunable frame *** measuring range depends on the spectrum width of the multi-wavelength *** tuning the speed of the modulating signal,the frame rate ranges from 100to 250 *** addition,the spatial resolution can be improved by increasing the group velocity dispersion and reducing the wavelength ***,with the development of photonic integrate circuits(PIC),the multi-wavelength laser source has the potential for integration on a photonic chip and thus the size of the proposed STEAM could be reduced in the future.

关键词：多波长激光器时间编码光学成像显微镜放大群速度色散序列光子芯片

Reconfigurable single-shot incoherent optical signal processing system for chirped microwave signal compression

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2017年第4期62卷 242-248页

作者： Ming Li Shuqian Sun Antonio Malacarne Sophie LaRochelle Jianping Yao ninghua zhu Jose Azana Institut National de la Recherche Scientifique-Energie Materiaux et Telecommunications(INRS-EMT)VarennesQuebec J3X 1S2Canada State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China TeCIP Institute Scuolo Superiore Sant'AnnaPisa 56124Italy Center for Optics Photonics and Laser(COPL)Universite LavalQuebec G1V OA6Canada Microwave Photonics Research Laboratory University of OttawaOntario K1N 6N5Canada

We propose and demonstrate a reconfigurable and single-shot incoherent optical signal processing system for chirped microwave signal compression, using a programmable optical filter and a multiwavelength laser(MWL). The system is implemented by temporally modulating a specially shaped MWL followed by a suitable linear dispersive medium. A microwave dispersion value up to 1.33 ns/GHz over several GHz bandwidth is achieved based on this approach. Here we demonstrate a singleshot compression for different linearly chirped microwave signals over several GHz bandwidth. In addition, the robustness of the proposed system when input RF signals are largely distorted is also discussed.

关键词： Fourier optics and signal processingAnalog optical signal processing Radio frequency photonics Pulse compression

Ultra-low V_(pp)and high-modulation-depth InP-based electro-optic microring modulator

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2021年第8期42卷 55-59页

作者： Dapeng Liu Jian Tang Yao Meng Wei Li ninghua zhu Ming Li State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of ScienceBeijing 100049China

A modulator is an essential building block in the integrated photonics,connecting the electrical with optical *** microring modulator gains much attention because of the small footprint,low drive voltage and high extinction *** ultra-low V_(pp)and high-modulation-depth indium phosphide-based racetrack microring modulator is demonstrated in this *** proposed device mainly comprises one racetrack microring,incorporating a semiconductor amplifier,and coupling with a bus waveguide through a multimode interference *** wave electrodes are employed to supply bidirectional bias ports,terminating with a 50-Ω *** on/off extinction ratio of the microring reaches 43.3 dB due to the delicately tuning of the *** 11 mV V_(pp),a maximum 42.5 dB modulation depth and a 6.6 GHz bandwidth are realized,*** proposed microring modulator could enrich the functionalities and designability of the fundamental integrated devices.

关键词： integrated photonics high-modulation-depth microring modulator

Experimental optimization of phase noise performance of optoelectronic oscillator based on directly modulated laser

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2012年第31期57卷 4087-4090页

作者： WANG LiXian zhu ninghua LIU JianGuo LI Wei zhu HongLiang WANG Wei State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

The experimental optimization of a 10 GHz optoelectronic oscillator (OEO) based on a 1.55 μm directly modulated distributed feedback (DFB) laser is demonstrated in this paper. The phase noise of the directly modulated laser (DML) based OEO is significantly reduced by proper selection of the laser's bias current and by using a dispersion shifted fiber as a delay line. The phase noise performance of the DML OEO achieved after optimization is close to that of a conventional OEO constructed using a commercial DFB laser and a LiNbO 3 Mach-Zehnder modulator. The DML based OEO is most promising for future realization of a miniature OEO architecture with the components integrated on a semiconductor substrate.

关键词：调制激光器光电振荡器相位噪声噪声性能直接调制优化实验 LiNbO3晶体