A5085229839- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Geological and Geochemical Analysis
- Planetary Science and Exploration
- Photonic Crystal and Fiber Optics
- earthquake and tectonic studies
- Magneto-Optical Properties and Applications
- High-pressure geophysics and materials
- Optical Network Technologies
- Astro and Planetary Science
- Scientific Research and Discoveries
- Supercapacitor Materials and Fabrication
- Microwave and Dielectric Measurement Techniques
- Evacuation and Crowd Dynamics
- Food Quality and Safety Studies
- Molecular Communication and Nanonetworks
- Marine and environmental studies
- Spacecraft and Cryogenic Technologies
- Innovative concrete reinforcement materials
- Graphene research and applications
- Geotechnical and construction materials studies
- Semiconductor Lasers and Optical Devices
- Soil Moisture and Remote Sensing
- Geomagnetism and Paleomagnetism Studies
- Magnetic Field Sensors Techniques
University of Shanghai for Science and Technology
2019-2022
Harbin Institute of Technology
2021
Ministry of Industry and Information Technology
2021
Henan Polytechnic University
2019
Chinese Academy of Sciences
1998-2010
National Space Science Center
2003-2010
Applications Research (United States)
2009
China Science and Technology Publishing & Media
1998-2001
Air Force Medical University
2001
A kind of compact all-fiber-optic vector magnetic sensor is proposed and demonstrated. The consists a side-polished-fiber (SPF)-integrated with singlemode-no core-singlemode (SNS) fiber structure. section side-polished breaks the axially symmetry composite as-fabricated supports sensing has field strength sensitivity up to -2370 pm/mT over 2-6 mT range. physical mechanism that modal interference strongly influenced by refractive index (RI) near surface. advantages lie in low cost, simple...
The durability of fiber-reinforced polymer (FRP) composites is significantly dependent on the structures and properties resin matrix. In present paper, effects physical or chemical interactions between molecular chain epoxy matrix water molecules alkaline groups absorption, mechanical structures, microstructures samples were studied experimentally. results showed that uptake curves immersed in an alkali solution over time presented a three-stage variation. At different immersion stages,...
A kind of dual-parameter sensor based on magnetic-fluid-coated nonadiabatic tapered microfiber (NTF) cascaded with fiber Bragg grating (FBG) is proposed and experimentally demonstrated. Simultaneous measurement magnetic field temperature realized by monitoring the variation NTF interference spectrum FBG characteristic dip. In range 0–18 mT, highest sensitivity can reach 1.159 nm/mT. The maximum up to −1.737 nm/°C in 25-50 °C. interferometer will find extensive application prospect due its...
A kind of ultrasensitive magnetic field sensor based on microfiber coupler and fluid (MF) is proposed investigated. As the working wavelength near birefringence-induced dispersion turning point (B-DTP), sensitivity has been enhanced considerably maximum can achieve −97.856 nm/mT. By tracking B-DTP, problem high but narrow detection range be solved. The temperature structure 0.816 nm/℃. advantages extremely sensitivity, which potential applications in high-precision measurement.
Flexible electrothermal mats with rapid responsiveness were prepared by spray-coating of graphene nanoplates (GNP) acetone dispersion on carbon fiber veil and following curing polydimethylsiloxane (PDMS) the mats. Morphological feature, electrical property, behavior different area density from 55 to 20 g m−2 investigated. Scanning electronic microscope (SEM) confirmed that pristine uniformly deposited surface resulting in volume resistance decreased substantially. Compared without coated...
A kind of magnetic field sensor is proposed, which based on symmetrically side-polished photonic crystal fiber (PCF) with regular hexagonal air holes. Magnetic fluid (MF) used as the field-sensitive material. The polished surfaces are coated an indium tin oxide (ITO) film to generate lossy mode resonance (LMR) for sensing. obtained sensitivity 466.81 pm/Oe, can be further adjusted by changing thickness ITO film. comprehensive sensing performance evaluated defining figure merit (FOM)....
Based on the anisotropic distribution of magnetic nanoparticles within fluid under an external field, a novel, to best our knowledge, vector field sensor based orthogonal offset spliced optical fiber structure cascaded with taper has been proposed. The expression interference dip wavelength respect is formulated, and dual-parameter sensing matrix established. Simultaneous measurement intensity direction realized. corresponding physical principle clarified. properties are experimentally...
Abstract The Late Neoproterozoic‐Early Palaeozoic suture zones within the Central Orogenic Belt of China can be considered a system—the Kunlun‐Qilian‐Qinling system (KQQ system). It is basically divided into western, central and eastern sectors. western sector consists Küda‐Subashi zone, Mazar‐Kangxiwar West Kunlun microblock. covers following five zones: Altun, North Qilian, Qaidam northern marginal, Qimantag‐Wutuo East southern marginal sutures, in addition to some microblocks such as...
The determination of a water mist additive is important to weaken the flame enhanced by mist, which affects safety and applicability fire-fighting technology certain extent. Based on theory physical chemistry, in this study, additive, that is, nonionic liquid alkyl phenol epoxide (APE) condensate intensification systematically perform an experimental study extinguishing fire oil pool with mist. results show has better atomization parameters. time maximum temperature are all decreased...
A polarization beam splitter (PBS) based on a magnetic fluid-filled dual-core photonic crystal fiber is characterized. This the first time that anisotropy of fluid applied to splitter. The designed device able separate x and y modes completely by applying an external field. When length 9.905 mm (or 16.795 mm), maximum bandwidth effective working wavelength 26 nm 70 nm) tunable field width approximately 5 Oe 165 Oe) corresponding range from 24 29 135 300 Oe). By tuning field, proposed may be...
为解决干涉型光纤应变传感器自由光谱范围较小或干涉条纹精细度较低等问题，提出了一种基于单拉锥光纤布拉格光栅的法布里-珀罗腔的应变传感结构及其改进方案。利用啁啾光纤布拉格光栅不同位置反射不同波长的特性，形成腔长随波长连续变化的法布里-珀罗腔，得到了无穷大的自由光谱范围且谐振谷精细度高。数值计算结果表明，应变传感灵敏度与拉锥光纤的腰区直径和栅区长度正相关。在0～300 με范围内，当腰区直径为光纤直径的3/25，栅区长度为30 mm时，应变传感灵敏度为7.05 pm/με。该结果对其他干涉型传感结构的设计具有一定的参考价值。
对同轴线-集中电容负载谐振腔, 采用传输测量使用的3dB 三频法决定有载Q<SUB>l</SUB>, 计及谐振频率下的插入损耗后获得无载Q<SUB>u</SUB>, 对同一腔体, 也用单端口反射测量技术的<EM>x</EM>d<EM>B</EM> 三频法, 并通过测量回程损耗在谐振点和xdB 点的输入反射系数振幅来获得无载Q<SUB>u</SUB>. 在500MHz 下40 个不同的耦合状况下, 两种方法得到无载Q<SUB>u</SUB>的算术平均值和标准差为2519±34. 这两种技术被用来调节和实现传输型谐振腔的输入、输出的等耦合和电介质测量, 本文从介质损耗测量的观点讨论了如何使用有载Q<SUB>l</SUB>和无载Q<SUB>u</SUB>.