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检索条件"任意字段=Conference on Photon Processing in Microelectronics and Photonics V"

共 397 条记录，以下是41-50 订阅

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Monolithically integrated multi-section semiconductor lasers: towards the future of integrated microwave photonics 5

Monolithically integrated multi-section semiconductor lasers...

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conference on Real-time photonic Measurements, Data Management, and processing v

作者： Zheng, Jilin Li, Jin Pu, Tao Zhang, Yunshan Shi, Yuechun Zhang, Xin Meng, Xianshuai Chen, Xiangfei Army Engn Univ PLA Coll Commun Engn Nanjing 210007 Peoples R China Nanjing Univ Posts & Telecommun Sch Optoelect Engn Nanjing 210023 Peoples R China Nanjing Univ Microwave Photon Technol Lab Natl Lab Microstruct Nanjing 210093 Peoples R China Nanjing Univ Coll Engn & Appl Sci Nanjing 210093 Peoples R China

ISBN: (纸本)9781510639263

Recent advances in monolithically integrated multi-section semiconductor lasers (MI-MSSLs) have propelled microwave photonic technologies to new potentials with a compact, reliable, and green implementation. Much research has examined that MI-MSSLs can realize the same or even better microwave photonic functions compared to discrete lasers by taking advantages of enhanced light-matter interactions. They are beneficial towards the future of integrated microwave photonics (IMWP) once integrating the other optical components such as modulators, amplifiers, transmission waveguide and so on. Herein, these recent advances in this emerging field are reviewed and discussed. Three main kinds of MI-MSSL structures are demonstrated including passive feedback laser, active feedback laser, as well as monolithically integrated mutually injected semiconductor laser. Their pros and cons are distinguished and compared through analyzing the desired characteristic indicators in modern MWP subsystems. The focus of this paper is on the photonic microwave techniques based on the nonlinear dynamics of MI-MSSLs, consisting of electro-optic conversion characteristics enhancement, photonic microwave generation, microwave photonic filter, as well as multiwavelength laser array for wavelength division multiplexing radio-over-fiber (WDM-RoF) networks. We also take a look at the future prospective at the research directions and challenges in this area.

关键词： Semiconductor laser dynamics optoelectronics microwave photonic integrated optics devices

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Q-processors for real-time image processing

Q-processors for real-time image processing

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conference on photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments

作者： Timchenko, Leonid, I Kokriatskaia, Natalia, I Pavlov, Sergii, v Stepaniuk, Dmytro S. Kutaev, Yuriy F. Kotyra, Andrzej Sagymbai, Aigul Abdihanov, Adil State Univ Infrastruct & Technol Kiev Ukraine Vinnytsia Natl Tech Univ Vinnytsia Ukraine Lublin Univ Technol Nadbystrzycka 38d PL-20618 Lublin Poland LN Gumilyov Eurasian Natl Univ ENU Astana Kazakhstan

ISBN: (数字)9781510639881

ISBN: (纸本)9781510639881

In the paper was considered increase of processors performance for solution of image recognition and images analysis (IRIA) problems is very actual for applied mathematics and related branches of science and technology, where the progress is achieved by real-time scale (RTS). The paper presents the main developments of the authors in a such vital and immortal for functioning of Q-processors problems as organization, comparative analysis of QQ-transformation (QQT) structure an neurolike structure, completeness and sufficient of Q-characteristics decomposition, algorithms of image restoration from the set of its Q-characteristics, noise-immunity and information content of QQT, result of comparative mathematical modeling, etc. Which are suggested in a number of papers, however, the analysis, performed in our paper, of certain problems dealing with methodology of generalized Q-transformation. Extreme simplicity of hardware realization provides achievement of maximum possible parallelism of data processing at minimum values of energy consumption and dimension - weight characteristics

关键词： generalized spatial-related preparation image recognition parallel hierarchical methods

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Design and Development of photon Counter for Silicon Carbide Ultraviolet Photometer Used in Space Instruments

Design and Development of Photon Counter for Silicon Carbide...

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International conference on photonics, Communication and Signal processing Technologies, ICPSPCT 2018

作者： Mogre, Praveen Kumar Karanth, S.P. Sumesh, M.A. vijay Yadav, Dilip Sreelakshmi, K. Department of Telecommunication Engineering R.V. College of Engineering Bengaluru560059 India Detector Section Laboratory for Electro-Optics Systems Indian Space Research Organization Bengaluru560058 India

ISBN: (纸本)9789811534768

photon counting is one of the advanced methods of measurement, and this type of measurement is required when the measuring signal is very small and accuracy requirement is large. photon counting methods are most commonly used in medical Uv imaging, missile seeker system, ozone emission study, and dosimeter applications. photon counting methods can be carried over a complete spectrum of light, but mostly done on a selective band of light like Uv, IR, X-rays, or visible light, to analyze the intensity variation of light. Uv photon counting is analyzed using silicon carbide (SiC) detector which was developed at LEOS and was designed to operate at a wavelength of 200–300 nm (solar blind). Design and implementation of a Uv photon counting electronics is developed for the solar-blind on-board Uv intensity measurement. This work deals with the design of essential readout electronics required to support the measurement of signals detected by SiC detectors developed by scientists at LEOS. LEOS detector and SGLUX detector (imported) are compared and performance analysis is carried out. The responsivity of both detectors is measured with the change in wavelength and also the quantum efficiency of the detector is measured over a solar-blind Uv-C band. The number of photons present in the detected signal has been calculated and also the obtained results are matched with the solar photon count per second in space. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Silicon carbide

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FLY-SPEC prototype: Uv-vIS-NIR reflectometry and laser induced breakdown spectroscopy

FLY-SPEC prototype: UV-VIS-NIR reflectometry and laser induc...

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conference on Fiber Lasers and Glass photonics - Materials through Applications II

作者： Zuppella, P. Da Deppo, v Zehra, S. S. Chioetto, P. Slemer, A. Fedel, M. Nicolosi, P. Ferrari, S. Meyzen, C. Nava, J. Nestola, F. Massironi, M. Natl Res Council Italy CNR Inst Photon & Nanotechnol IFN Via Trasea 7 I-35131 Padua Italy Univ Padua Dept Informat Engn Via Giovanni Gradenigo 6 I-35131 Padua Italy Univ Padua Ctr Ateneo Studi & Att Spaziali G Colombo CISAS Via Venezia 15 I-35131 Padua Italy Dept Geosci Via Giovanni Gradenigo 6 I-35131 Padua Italy

ISBN: (数字)9781510634879

ISBN: (纸本)9781510634879

Development of efficient, non-destructive, time-saving and innovative instruments for material identification surveying is urgently requested in several fields, including solid-state physics, industrial processing, waste recycling and environmental contamination detection. In this respect, coupling laser-induced breakdown spectroscopy (LIBS) and (near-infrared unit) NIR reflectometry with hyperspectral imaging spectroscopy (HIS), owing to its power and versatility, is key to more efficient and time-saving diagnostic of chemical and physical properties of rocks and unconsolidated materials. Here we present the FLY-SPEC instrument conceived to combine these three relevant techniques for space exploration surveying. The recent assemblage of its LIBS unit has allowed us to conduct our first pilot experiments.

关键词： LIBS NIR reflectometry spectroscopy space

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Design of a Current-Mode Front-End Readout ASIC Featured 100 pC and 20 Mcps for High-Speed photon Counting

Design of a Current-Mode Front-End Readout ASIC Featured 100...

引用

IEEE Symposium on Nuclear Science (NSS/MIC)

作者： J. W. Wang Q. S. Xu B. Wang J. H. Geng P. Huang W. Gao Institute of Microelectronics School of Computer Science and Technology Northwestern Polytechnical University Xi’an China State Key Laboratory of Particle Detection and Electronics China China Testing Technology Co. Ltd Chengdu China National Institute of Measurement and Testing Technology Chengdu China

ISBN: (数字)9781665421133

ISBN: (纸本)9781665421140

This paper presents the design of a current-mode readout ASIC for high-gain detectors to meet the high-speed photon-counting application. A regulated common-gate amplifier and a current mirror with negative feedback are proposed to implement the preamplifiers. The input resistance and the -3 dB bandwidth of the two preamplifiers are carefully taken into account. In addition, a current-mode comparator is adopted to reduce the propagation time. In order to mitigate the effects of preamplifier output noise, a current-mode comparator with hysteresis is designed. An eight-channel front-end readout ASIC is designed in CMOS 0.35 μm 3.3 v process. Each channel is consisted of a current-mode preamplifier, a current discriminator, a 7-bit current-steering digital-to-analog converter (DAC) and a large bandwidth output buffer. Test results indicate that the maximum count rate of the readout ASIC is larger than 20Mcps.

关键词： Negative feedback Bandwidth Preamplifiers Impedance X-ray imaging Hysteresis photonics

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Simple Down-Conversion by Power Detector in a 2x2 MIMO v-Band Optical/Wireless System with Mitigation of Beating Interference 24

Simple Down-Conversion by Power Detector in a 2x2 MIMO V-Ban...

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24th OptoElectronics and Communications conference (OECC) / International conference on photonics in Switching and Computing (PSC)

作者： Tsai, Tsung-Hung Xie, Zhen-Xiong Huang, Ping-Yao Li, Cheng-Xi Chen, Wen-Huang Chen, Chao-Wei Lin, Chun-Ting Wei, Chia Chien Natl Chiao Tung Univ Inst Photon Syst 301Gaofa 3rd Hsinchu 711 Tainan County Taiwan Natl Sun Yat Sen Univ Dept Photon Kaohsiung 804 Taiwan

We demonstrate a 58.74-Gbps v-band RoF system employing 2x2 MIMO technology and power detector for down-conversion for the first time. The proposed gapless method and the SSBI mitigation schemes achieve 45% capacity i... 详细信息

ISBN: (纸本)9784885523212

关键词： Radio-over-fiber access networks Digital signal processing techniques for optical communications

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Electrodynamics model of a hydrogen sensor based on a special photonic crystal fiber taper coated with a nano-scale palladium film 4

Electrodynamics model of a hydrogen sensor based on a specia...

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4th International conference on Applications of Optics and photonics (AOP)

作者： Minkovich, vladimir P. Sotsky, A. B. Shilov, A. v. Sotskaya, L. I. Ctr Invest Opt Div Photon Loma Bosque 115Colonia Lomas Campestre Leon 37150 Gto Mexico AA Kuleshov Mogilev State Univ Dept Phys 1 Kosmonavtov Str Mogilev 212009 BELARUS Belarussian Russian State Univ Dept Math 43 Mira Prospect Mogilev 212000 BELARUS

ISBN: (数字)9781510631649

ISBN: (纸本)9781510631649

An electrodynamics model of a fiber-optic hydrogen sensor with a taper in a special photonic-crystal fiber coated by a nano-scale palladium film is proposed. The transmission spectrum of the sensor is explained by the interference and mutual transformation of local modes in the taper. As a result, the model contains 3m + 1 free parameters, where m is the number of local modes taken into account. The parameters are determined by the least square method from the experimental transmission spectrum. This approach allows us to determine the dispersion characteristics of a nanoscale palladium film in a hydrogen atmosphere and optimize the taper from the standpoint of maximizing the sensitivity of the sensor.

关键词： Fiber optics sensors interferometry photonic crystal fiber taper hydrogen palladium

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Nonlinear Interactions in Linearly Uncoupled Resonators

Nonlinear Interactions in Linearly Uncoupled Resonators

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conference on Lasers and Electro-Optics (CLEO)

作者： Menotti, M. Morrison, B. Tan, K. vernon, Z. Sipe, J. E. Liscidini, M. Xanadu 372 Richmond St W Toronto ON M5V 1X6 Canada Univ Toronto Dept Phys 60 St George St Toronto ON M5S 1A7 Canada Univ Pavia Dipartimento Fis Via Bassi 6 I-27100 Pavia Italy

We demonstrate a system composed of two resonators that are coupled solely through a third-order nonlinear interaction. We show that such a structure has significant advantages in controlling classical and quantum non... 详细信息

ISBN: (纸本)9781943580576

关键词： Coupled resonators Optical directional couplers Optical processing devices Phase matching Resonant modes Self phase modulation

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Siliceous diatom frustules - A smart nanotechnology platform 10

Siliceous diatom frustules - A smart nanotechnology platform

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10th International conference on Key Engineering Materials (ICKEM)

作者： Korsunsky, Alexander M. Bedoshvili, Yekaterina D. Cvjetinovic, Julijana Aggrey, Patrick Dragnevski, Kalin, I Gorin, Dmitry A. Salimon, Alexey, I Likhoshway, Yelena, v Skolkovo Inst Sci & Technol Ctr Energy Sci & Technol Nobel St 3 Moscow 121205 Russia Univ Oxford Dept Engn MBLEM Parks Rd Oxford OX1 3PJ England Limnol Inst SB RAS 3 Ulan Batorskaya Irkutsk 664033 Russia Skolkovo Inst Sci & Technol Ctr Photon & Quantum Mat 3 Nobelya Str Moscow 121205 Russia Univ Oxford Dept Engn Sci Parks Rd Oxford OX1 3PJ England

The pursuit of new nanotechnologies is driven by the demand for miniaturization, ubiquitous computing, increasing connectivity and the Internet of Things (IoT) paradigm, the environmental agenda, and the confluence between microelectronics and biomedical fields. Of particular interest for the present overview are the capabilities of prokaryotic and eukaryotic microorganisms to fabricate numerous nanostructured self-copies from ecologically friendly and renewable raw materials offering new pathways for low energy consumption, smart nanofabrication at production rates that remain unattainable for today's engineering technologies. The present discussion is focused on the use of stiff and strong nanostructured silica diatom frustules that is widely mooted in the literature in consideration of photonic, photovoltaic, plasmonic, and drug delivery applications. Chemical post-processing routes can be applied to synthesize and deposit nanostructures (Ag, Au, MnO2, ZnO etc.) using templates and substrates of diatomaceous earth and individual diatom frustules. In this concise overview we discuss the background knowledge, motivation and justification for the use of siliceous diatom frustules as a platform for smart nanofabrication, and attempt to anticipate future developments in this field. (C) 2020 Elsevier Ltd. All rights reserved.

关键词： Nanofabrication Diatoms Patterned nanotemplates Guided nanoparticle growth Biomimetics

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Study of the microwave photonic sensing by utilizing the incoherent light source with the serial fiber Brag gratings 11

Study of the microwave photonic sensing by utilizing the inc...

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11th International conference on Information Optics and photonics (CIOP)

作者： Gui, Lin Zhu, Yu-xuan Song, Su-zhen Guo, Yun-ci Shanghai Polytech Univ Coll Comp & Informat Engn Shanghai 201209 Peoples R China Shanghai Polytech Univ Sch Environm & Mat Engn Shanghai 201209 Peoples R China

ISBN: (数字)9781510631748

ISBN: (纸本)9781510631748

Microwave photonic filter is one of the key technologies of microwave photonics. Its main purpose is to replace the traditional method to process radio frequency signal, modulate optical carrier by radio frequency signal, and process it directly in the optical domain. The advantage of FIR microwave photonic filter is that it has no system poles and is more stable. It guarantees linear phase, which is very important in signal processing. In this paper, the incoherent microwave photon sensor cascaded by FBG is verified experimentally. In the experiment, three FBG wavelengths are 1530 nm, 1550.12nm and 1539.5nm respectively to form a high-order FIR microwave photon filter, two 3dB couplers and three km fibers to form an unbalanced M-Z interferometer. The incoherent light generated by EDFA is modulated by a filter electro-optic modulator through an optical fiber Bragg grating, demodulated by an M-Z interferometer, and eventually received by a photodetector. In the experiment, 60 MHz near notch is chosen as the modulation frequency, the amplitude of modulation signal is 4 v-pp, the temperature range is 30-40 degrees C with the temperature interval of 1 degrees C. The sensitivities of 0.2219dBm/degrees C are obtained by processing the average values of 3 points, 5 points, 7 points, 10 points and 15 points.

关键词： Microwave photonics Fiber Bragg grating Microwave photonic filter Mach-Zehnder interferometer

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