检索结果-南通市图书馆

Implantable optical fiber microelectrode with anti-biofouling ability for in vivo photoelectrochemical analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2023年第3期34卷 259-263页

作者： Lixia Tao Yao Kong Yunhui Xiang Yu Cao Xiaoxue Ye Zhihong Liu College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering Wuhan 430072China

In-situ monitoring of neurochemicals is of vital importance for the understanding of brain ***-based photoelectrochemical(PEC) sensing has emerged as a promising tool for in vivo analysis since it inherits the merits of both optical and electrochemical methods. However, the in-situ excitation of photoactive materials on the photoelectrode in living body is still a challenge because of limited tissue penetration depth of light. To circumvent this problem, we herein developed an implantable optical fiber(OF)-based microelectrode for in vivo PEC analysis. The working electrode was constructed by coating Au film as conducting layer and CdS@ZnO as photoactive material on a micron-sized OF,which was free of the limitation of light penetration in biological tissues. Further decoration of an antibiofouling layer on the surface made the sensor robust in biosamples. It was successfully applied for monitoring Cu^(2+) level in three different brain regions in the rat model of cerebral ischemia/reperfusion.

关键词： optical fiber Implantable microelectrode Photoelectrochemical sensing In vivo analysis Neurochemicals

A radiation–temperature coupling model of the optical fiber attenuation spectrum in the Ge/P co-doped fiber

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第7期31卷 361-365页

作者：李勇张浩石王晓伟金靖 School of Instrument Science and Optic-electronics Engineering Beihang UniversityBeijing 100191China Beijing Institute of Control Engineering Beijing 100094China Science and Technology on Space Intelligent Control Laboratory Beijing 100094China

A radiation–temperature coupling model of optical fiber attenuation spectrum has been *** spectrum in Ge/P co-doped fiber ranging from 800 nm–1600 nm at different temperatures and doses was measured and decomposed according to the configurational coordinate model based on which the power-law model was employed to predict the intensity of the color center absorption band at different *** the fiber loss in space was predicted by the *** work will benefit the application of fibers in a complicated radiation environment.

关键词： radiation temperature color centers optical fiber

Sensitivity enhancement of WS2-coated SPR-based optical fiber biosensor for detecting glucose concentration

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第11期29卷 283-289页

作者：蔡云李卫冯烨赵建胜白刚许杰李金泽 College of Electronic and optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210093China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510641China Research Center of optical Communications Engineering&Technology Nanjing 210023China

In this paper,we propose a theoretical model of the surface plasmon resonance-based optical fiber biosensor for detecting glucose *** Au/ZnO/WS2 multilayer film is coated around optical *** with the conventional surface plasmon resonance sensor,WS2 material can increase the sensitivity of the *** absorption capacity of WS2 is used to load glucose oxidase by forming a sensitive area to recognize *** index of the solution is calculated and then the concentration of the glucose can be obtained by the correspondence between refractive index and glucose *** highest sensitivity of the SPR biosensor with a structure of 40-nm Au/5-nm ZnO/14 layers of WS2 is 4310 nm/*** proposed WS2-based SPR fiber biosensor has a unique effect on the detection of glucose *** is expected to have potential applications in future medical blood glucose concentration detection.

关键词： surface plasmon resonance optical fiber biosensor glucose

Interface and Quality of Nanometer TiO_2 Coated optical fiber

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2003年第S1期21卷 131-133页

作者：赵玉红刘家臣魏艳秋 School of Materials Science and Engineering Tianjin UniversityKey Lab of Advanced Ceramics and Machining TechnologyMinistry of Education

The interface and quality of TiO_2 coated optical fiber,which is obtained by dipping nude fibers into TiO_2 slurry,were investigated. The coating processes were carried out under different designed conditions,including various adhesives,solid content of TiO_2 slurry,times of cladding and followed heat-treat temperature. The interface and coating qualities were observed by scanning electron microscope. Coating defects,such as cracking,breaking off and the inhomogeneity of the cladding corresponds to different coating condition were analyzed. As a result, a well-combined and durable TiO_2 coating in optical fiber surface was obtained under definite optimizing experimental conditions and parameters.

关键词： photoreactor optical fiber coating TiO_2 rare earths

Harmful Intrusion Detection Algorithm of optical fiber Pre-Warning System Based on Correlation of Orthogonal Polarization Signals

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2017年第3期7卷 226-233页

作者： Fukun BI Chong FENG Hongquan QU Tong ZHENG Chonglei WANG School of Electrical and Information Engineering North China University of Technology Beijing 100144 China Beijing Institute of Technology Department of Information and Electronic Beijing 100081 China

At present, advanced researches of optical fiber intrusion measurement are based on the constant false alarm rate （CFAR） algorithm. Although these conventional methods overcome the interference of non-stationary random signals, there are still a large number of false alarms in practical applications. This is because there is no specific study on orthogonal polarization signals of false alarm and intrusion. In order to further reduce false alarms, we analyze the correlation of optical fiber signals using birefringence of single-mode fiber. This paper proposes the harmful intrusion detection algorithm based on the correlation of two orthogonal polarization signals. The proposed method uses correlation coefficient to distinguish false alarms and intrusions, which can decrease false alarms. Experiments on real data, which are collected from the practical environment, demonstrate that the difference in correlation is a robust feature. Furthermore, the results show that the proposed algorithm can reduce the false alarms and ensure the detection performance when it is used in optical fiber pre-warning system （OFPS）.

关键词： optical fiber birefringence orthogonal polarization signals correlation

BN/SiBCN light-leakage-proof coatings of silica optical fiber for long term sensors at high temperatures

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 Journal of Aeronautics 2021年第5期34卷 93-102页

作者： Xin’gang LUAN Xinming XU Rong YU Qiqi ZHANG Sam ZHANG Laifei CHENG Science and Technology on Thermo Structural Composite Materials Laboratory Northwestern Poly technical UniversityXian 710072China Faculty of Materials and Energy Southwest UniversityChong Qing 400715China

SiBCN and BN/SiBCN light-leakage-proof coatings were prepared on silica optical fibers for sensing applications at high *** electron microscopy was used to characterize the surface morphology and microstructure of the coated *** and optical properties of the coated fiber were characterized by Raman,optical and tensile *** with the original fiber,the tensile strength of Si BCN and BN/Si BCN coated fiber show an increase of about 60%and 90%at room temperature,*** addition,the tensile strength of BN/Si BCN coated silica optical fiber was increased by about 42%at 700°*** has been found that the improvement of the strength of BN/Si BCN coated silica optical fiber is related to the healing of defects and residual compressive stress in *** the light transmittance performance of the coated fiber,it was found that BN/Si BCN double coating could be an ideal total reflection solution to protect silica optical fiber from light leakage during high temperature sensing operation.

关键词： BN/SiBCN double coating High temperature optical fiber Sensor Silica

3D Printing Technology for Tapered optical fiber Protection With Gas Sensing Possibilities

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2020年第4期10卷 298-305页

作者： Kaleb Roncatti de SOUZA Jonas H.OSÓRIO Juliana B.CARVALHO Beatriz Mota LIMA Cristiano M.B.CORDEIRO Gleb Wataghin Physics Institute State University of CampinasCampinas 13083-970Brazil

We present a new procedure for protecting micro-optical fibers(tapered fibers)by using the 3-dimensional(3D)printing technology.A standard single-mode optical fiber was tapered down to the diameter of 1mm and embedded in a polymeric matrix obtained by an additive manufacturing *** show that the proposed structure protects the fiber taper against environmental humidity while keeping permeability to gas flow and the possibility of the realization of gas detection *** our knowledge,this is the first time 3D printed casings were applied to protect fiber tapers from humidity *** envisage this new approach will allow the development of new fiber taper devices to better resist in humid environments.

关键词： 3D printing additive manufacturing optical fiber tapered fibers sensing

Synthesis of strong SiV photoluminescent diamond particles on silica optical fiber by chemical vapor deposition

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 Physics B 2018年第3期27卷 481-486页

作者：仰宗春梅盈爽陈成克阮银兰胡晓君 College of Materials Science and Engineering Zhejiang University of Technology ARC Centre of Excellence in Nanoscale Biophotonics Institute of Photonics and Advanced SensingThe University of Adelaide

The separated silicon-vacancy （SiV） photoluminescent diamond particles were synthesized on a silica optical fiber by hot filament chemical vapor deposition （HFCVD）. The effects of the pre-treated method and chamber pressure on the microstructure and photoluminescence of the diamond particles were investigated. The results show that the diamond particles are homogeneously distributed on the surface of the optical fiber. With the chamber pressure increasing from 1.6 kPa to 3.5 kPa, the shape of the particles transforms from flake to circle, while the diamond particles cannot be deposited on the fiber with the pressure further increased to 4.5 kPa. The samples synthesized under 2.5 kPa chamber pressure are composed of diamond particles with size around 200-400 nm, exhibiting stronger SiV photoluminescence with the width of around 6 nm.

关键词： diamond silicon vacancy photoluminescence optical fiber

Multi-focus optical fiber lens based on all-dielectric metasurface

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2021年第5期19卷 6-11页

作者：张星宇关春颖王可达程琳杨菁史金辉刘宏超刘志海苑立波 Key Laboratory of In-fiber Integrated Optics of Ministry of Education College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao SARChina Photonics Research Center Guilin University of Electronics TechnologyGuilin 5A1004China

A multi-focus optical fiber lens is numerically demonstrated based on an all-dielectric metasurface *** metasurface consists of an array of rectangular silicon resonators with varying widths in order to obtain the required phase *** core diameter of the multimode fiber is large enough to contain sufficient resonance *** spatial distribution of the dielectric resonators is dictated by spatial multiplexing,including interleaving meta-atoms and lens aperture division,to achieve multi-focus *** proposed optical fiber metalens can produce two or three focal points along the longitudinal direction with high focusing *** size of every focal point is close to the diffraction limit,and the relative intensity on each focus can be controlled by adjusting the number of the respective *** proposed optical fiber lens will have a great potential in the fields of integrated optics and multifunctional micro/nano devices.

关键词： multi-focus lens optical fiber metasurface