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Design of a Surface-Plasmon-Resonance Sensor Based on a Microstructured Optical Fiber with Annular-Shaped Holes
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作者 祝远锋 陈明阳 +2 位作者 王华 张永康 杨继昌 《Plasma Science and Technology》 SCIE EI CAS CSCD 2014年第9期867-872,共6页
A novel design is proposed for highly sensitive surface-plasmon-resonance sensors. The sensor is based on a microstructured optical fiber with two layers of annular-shaped holes. A gold layer is deposited on the inner... A novel design is proposed for highly sensitive surface-plasmon-resonance sensors. The sensor is based on a microstructured optical fiber with two layers of annular-shaped holes. A gold layer is deposited on the inner surface of the second hole-layer, in which the holes have several micrometers thickness in size, facilitating analyte infiltration and metal layer deposition. In the first layer of holes, the sector-ring^shaped arms, used as supporting strips, are utilized to tune the resonance depth of the sensor. Numerical results indicate that the sensor operation wavelength can be tuned across the C+L-band. The spectral sensitivity of 1.0.104 nm. RIU-1 order of magnitude and a detection limit of 1.0.10-4 RIU order are demonstrated over a wide range of analyte refractive index from 1.320 to 1.335. 展开更多
关键词 microstructured optical fiber surface-plasmon-resonance spectral sensitivity
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Effect of structure random disturbances on characterizations of microstructured optical fibres
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作者 陆洋 张冶金 +3 位作者 杨四刚 彭小舟 陈向飞 谢世钟 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第11期2235-2240,共6页
A method is presented to analyse the effect of structure random disturbances on the confinement loss and the chromatic dispersion characterizations of microstructured optical fibres, which combines multipole methods w... A method is presented to analyse the effect of structure random disturbances on the confinement loss and the chromatic dispersion characterizations of microstructured optical fibres, which combines multipole methods with the random statistics process. Some useful results to the fabrication of microstructured optical fibres have been obtained. 展开更多
关键词 microstructured optical fibres (mofs DISPERSION LOSS multipole methods
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Microstructured Cantilever Probe on Optical Fiber Tip for Microforce Sensor
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作者 Famei WANG Changrui LIAO +4 位作者 Mengqiang ZOU Dejun LIU Haoqiang HUANG Chao LIU Yiping WANG 《Photonic Sensors》 SCIE EI CSCD 2024年第2期89-99,共11页
Benefiting from the great advances of the femtosecond laser two-photon polymerization(TPP)technology,customized microcantilever probes can be accurately 3-dimensional(3D)manufactured at the nanoscale size and thus hav... Benefiting from the great advances of the femtosecond laser two-photon polymerization(TPP)technology,customized microcantilever probes can be accurately 3-dimensional(3D)manufactured at the nanoscale size and thus have exhibited considerable potentials in the fields of microforce,micro-vibration,and microforce sensors.In this work,a controllable microstructured cantilever probe on an optical fiber tip for microforce detection is demonstrated both theoretically and experimentally.The static performances of the probe are firstly investigated based on the finite element method(FEM),which provides the basis for the structural design.The proposed cantilever probe is then 3D printed by means of the TPP technology.The experimental results show that the elastic constant k of the proposed cantilever probe can be actively tuned from 2.46N/m to 62.35N/m.The force sensitivity is 2.5nm/μN,the Q-factor is 368.93,and the detection limit is 57.43nN.Moreover,the mechanical properties of the cantilever probe can be flexibly adjusted by the geometric configuration of the cantilever.Thus,it has an enormous potential for matching the mechanical properties of biological samples in the direct contact mode. 展开更多
关键词 optical fiber sensor microforce sensing microstructured cantilever two-photon polymerization
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Optical properties and local structure of Dy^(3+)-doped chalcogenide and chalcohalide glasses 被引量:4
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作者 唐高 杨志勇 +1 位作者 罗澜 陈玮 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第6期889-894,共6页
Dy^3+-doped Ge-Ga-Se chalcogenide glasses and GeSe2-Ga2Se3-CsI chalcohalide glasses were prepared. The absorption, emission properties, and local structure of the glasses were investigated. When excited at 808 nm dio... Dy^3+-doped Ge-Ga-Se chalcogenide glasses and GeSe2-Ga2Se3-CsI chalcohalide glasses were prepared. The absorption, emission properties, and local structure of the glasses were investigated. When excited at 808 nm diode laser, intense 1.32 and 1.55 μm near-infrared luminescence were observed with full width at half maximum (FWHM) of about 90 and 50 nm, respectively. The lifetime of the 1.32 μm emission varied due to changes in the local structure surrounding Dy^3+ ions. The longest lifetime was over 2.5 ms, and the value was significantly higher than that in other Dy^3+-doped glasses. Some other spectroscopic parameters were calculated by using Judd-Ofelt theory. Meanwhile, Ge-Ga-Se and GeSe2-Ga2Se3-CsI glasses showed good infrared transmittance. As a result, Dy^3+-doped Ge-Ga-Se and GeSe2-Ga2Se3-CsI glasses were believed to be useful hosts for 1.3 μm optical fiber amplifier. 展开更多
关键词 chalcogenide glass chalcohalide glass optical properties microstructurE 1.3 μm optical fiber amplifier rare earths
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Ultraflat, broadband, and highly coherent supercontinuum generation in all-solid microstructured optical fibers with all-normal dispersion 被引量:4
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作者 CHUNLEI HUANG MEISONG LIAO +8 位作者 WANJUN BI XIA LI LILI HU LONG ZHANG LONGFEI WANG GUANSHI QIN TIANFENG XUE DANPING CHEN WEIQING GAO 《Photonics Research》 SCIE EI 2018年第6期601-608,共8页
High flatness, wide bandwidth, and high-coherence properties of supercontinuum(SC) generation in fibers are crucial in many applications. It is challenging to achieve SC spectra in a combination of the properties, sin... High flatness, wide bandwidth, and high-coherence properties of supercontinuum(SC) generation in fibers are crucial in many applications. It is challenging to achieve SC spectra in a combination of the properties, since special dispersion profiles are required, especially when pump pulses with duration over 100 fs are employed. We propose an all-solid microstructured fiber composed only of hexagonal glass elements. The optimized fiber possesses an ultraflat all-normal dispersion profile, covering a wide wavelength interval of approximately 1.55 μm. An SC spectrum spanning from approximately 1030 to 2030 nm(corresponding to nearly one octave) with flatness<3 dB is numerically generated in the fiber with 200 fs pump pulses at 1.55 μm. The results indicate that the broadband ultraflat SC sources can be all-fiber and miniaturized due to commercially achievable 200-fs fiber lasers. Moreover, the SC pulses feature high coherence and a single pulse in the time domain, which can be compressed to 13.9-fs pulses with high quality even for simple linear chirp compensation. The Fourier-limited pulse duration of the spectrum is 3.19 fs, corresponding to only 0.62 optical cycles. 展开更多
关键词 fiber design and fabrication Photonic crystal fibers Nonlinear optics fibers Pulse compression Femtosecond phenomena Supercontinuum generation
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Reseach Progress of Photonic Crystal Fibers in China
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作者 Li Jinyan, Chen Wei Optical Fiber R&D Department of Fiberhome Telecommunication Technologies Co. Ltd,Wuhan, Hubei, China, 430074 《China Communications》 SCIE CSCD 2008年第1期28-38,共11页
Photonic Crystal Fibers have attracted worldwideinterest within the last decade due to their uniqueoptical properties and because they exhibit a muchhigher degree of design freedom compared to conventionaloptical fibe... Photonic Crystal Fibers have attracted worldwideinterest within the last decade due to their uniqueoptical properties and because they exhibit a muchhigher degree of design freedom compared to conventionaloptical fibers.In this article, the fabricationtechnologies of photonic crystal fibers and theirapplications at home and abroad were formulated atlength, especially in the following fields, such aslarge mode area active photonic crystal fibers andfiber lasers, birefringence fibers and sensors, highnonlinear photonic crystal fibers and frequencytransformation, dispersion compensation PCFs anddispersion compensation for telecommunicationsystems, and photonic band-gap fibers. Finally, accordingto the above analysis, the prospects anddeveloping trends of photonic crystal fibers in thefuture were presented. 展开更多
关键词 PHOTONIC CRYSTAL fiber microstructure optical fiber fabrication application fiber laser RARE EARTH device
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大孔柚子型微结构光纤探针的表面增强拉曼散射性能研究
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作者 李佳轩 付子珍 +5 位作者 曹茜清 胡志国 付兴虎 付广伟 金娃 毕卫红 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2024年第2期527-533,共7页
随着光纤制备工艺以及纳米材料制备技术的发展,光纤探针已成为一种新型的表面增强拉曼散射(SERS)基底,通过在普通单模光纤或多模光纤上制备不同的结构并修饰相应的纳米材料,可以得到多种类型的光纤表面增强拉曼散射探针,并实现较好的检... 随着光纤制备工艺以及纳米材料制备技术的发展,光纤探针已成为一种新型的表面增强拉曼散射(SERS)基底,通过在普通单模光纤或多模光纤上制备不同的结构并修饰相应的纳米材料,可以得到多种类型的光纤表面增强拉曼散射探针,并实现较好的检测效果。但受限于光纤本身的结构,普通光纤仅能利用端面或侧表面提供拉曼检测的“热点”区域,限制了其SERS性能的进一步提高。因此制备了大孔柚子型微结构光纤(MSF)表面增强拉曼散射(SERS)探针,其中大孔柚子型MSF SERS探针结构通过一段阶跃多模光纤与柚子型微结构光纤熔接制得。实验分别对自制的纳米银溶胶基底以及大孔柚子型MSF SERS探针的SERS性能进行检测。采用溶胶自组装法制备负载银纳米颗粒的MSF SERS探针,通过控制自组装时间制备不同光纤SERS探针(Ag/MSF-x,其中x为自组装时间,分别为15、30、45、60 min)。采用溶液检测方法,利用Ag/MSF-x探针对10^(-3) mol·L^(-1)的亚甲基蓝(MB)探针分子进行检测,通过比较相同条件下的增强效果筛选得到Ag/MSF-45探针。为进一步检测Ag/MSF-45探针的SERS性能,制备不同浓度的MB溶液,分别利用纳米银溶胶基底和Ag/MSF-45探针对其进行检测。实验结果表明,纳米银溶胶基底对MB的检测限(LOD)为10^(-6) mol·L^(-1),Ag/MSF-45探针对MB的检测限(LOD)为10^(-7) mol·L^(-1);拉曼信号的再现性结果表明纳米银溶胶基底以及Ag/MSF-45探针在各个特征峰处的RSD值均在合理范围内;在1619 cm^(-1)拉曼位移处对纳米银溶胶基底以及Ag/MSF-45探针检测MB的拉曼强度和浓度进行对数转换拟合,纳米银溶胶基底的拟合优度R2达0.91628,Ag/MSF-45探针的拟合优度R2达0.98848;纳米银溶胶基底和Ag/MSF-45探针的再现性结果表明,其在各个特征峰处的RSD值均处于合理范围,但Ag/MSF-45探针的各特征峰RSD值均小于纳米银溶胶基底,最大为13.89%;利用10^(-6) mol·L^(-1)的MB对Ag/MSF-45探针的增强因子(AEF)进行计算,Ag/MSF-45探针的AEF达到6.09×10^(6),表现出良好的增强效果。因此,基于大孔柚子型MSF SERS探针凭借独特的空气孔结构使其具有较高的灵敏度以及良好的再现性,且其SERS性能均优于纳米银溶胶基底,在农业、化学分析、生物检测等领域及大分子物质检测等方面应用前景广泛。 展开更多
关键词 表面增强拉曼散射 柚子型微结构光纤 光纤探针 纳米银溶胶 亚甲基蓝
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孔助光纤(Hole-assisted lightguide fiber)色散和双折射特性的研究 被引量:1
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作者 栗岩锋 王清月 +1 位作者 刘博文 胡明列 《光子学报》 EI CAS CSCD 北大核心 2004年第11期1313-1316,共4页
通过改变包层中空气孔的参数,孔助光纤(holeassistedlightguidefiber)具有比传统光纤更容易调节的色散和双折射特性.采用有限差分法研究了包层空气孔数目、大小和位置等参数对孔助光纤色散和双折射特性的影响.数值计算结果表明增加空气... 通过改变包层中空气孔的参数,孔助光纤(holeassistedlightguidefiber)具有比传统光纤更容易调节的色散和双折射特性.采用有限差分法研究了包层空气孔数目、大小和位置等参数对孔助光纤色散和双折射特性的影响.数值计算结果表明增加空气孔的数目和尺寸以及减小空气孔到纤芯的距离都能够使得零色散向短波长方向移动,减小空气孔与纤芯的距离有助于获得更大的双折射. 展开更多
关键词 孔助光纤(hole—assisted lightguide fiber) 微结构光纤 有限差分法 色散 双折射
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Grating Writing in Structured Optical Fibers
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作者 John CANNING Nathaniel GROOTHOFF +4 位作者 Kevin COOK Michael STEVENSON John HOLDSWORTH Matthieu LANCRY Bertrand POUMELLEC 《Photonic Sensors》 SCIE EI CAS 2011年第3期199-203,共5页
Grating writing in structured optical fibers is reviewed. Various laser sources have been used including UV and near IR nanosecond and femtosecond lasers, each enabling different material processing regimes. The issue... Grating writing in structured optical fibers is reviewed. Various laser sources have been used including UV and near IR nanosecond and femtosecond lasers, each enabling different material processing regimes. The issue of scattering is modeled through simulation and compared with experiment. Good agreement has been established. 展开更多
关键词 GRATINGS structured optical fibers Fresnel fibers photonic crystal fibers microstructured optical fibers sensors
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Characteristics of Bragg Gratings in All-Solid Photonic Bandgap Fiber
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作者 Bai-Ou Guan Zhi Wang +1 位作者 Yang Zhang Da Chen 《Journal of Electronic Science and Technology of China》 2008年第4期438-441,共4页
We report on fiber Bragg gratings in all-solid photonie bandgap fiber that was composed of a triangular array of high-index Ge-doped rods in pure silica background with fluorine-doped index-depressed layer surrounding... We report on fiber Bragg gratings in all-solid photonie bandgap fiber that was composed of a triangular array of high-index Ge-doped rods in pure silica background with fluorine-doped index-depressed layer surrounding the Ge-doped rod. Fiber Bragg gratings were photowritten with 193 nm ArF excimer laser and characterized for their response to strain, temperature, bending, and torsion. These gratings couple light from the forward core mode to not only backward core mode but also backward rod modes. This results in multiple resonance peaks in the reflection spectrum. All resonance wavelengths exhibited the same temperature and strain response with coefficient similar to that of Bragg gratings in standard single-mode fiber. The strength of the resonance peaks corresponding to the backward rod modes showed high sensitivity to bending and torsion. 展开更多
关键词 fiber Bragg gratings fiber optic sensors microstructured optic fibers photonic bandgap fibers.
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用于裂隙光源的侧面发光塑料光纤散射点设计
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作者 龚冬梅 庄秀秀 +1 位作者 洪雪梅 庄凤江 《华侨大学学报(自然科学版)》 CAS 2023年第2期250-256,共7页
设计一种侧面发光塑料光纤表面正四棱锥形微结构散射点,使侧面发光塑料光纤可用作裂隙灯显微镜的裂隙光源,以减小裂隙光源的体积.采用光学仿真软件分析光纤上表面(有散射点)和光纤下表面(无散射点)的散射率,当塑料光纤直径为1 mm时,得... 设计一种侧面发光塑料光纤表面正四棱锥形微结构散射点,使侧面发光塑料光纤可用作裂隙灯显微镜的裂隙光源,以减小裂隙光源的体积.采用光学仿真软件分析光纤上表面(有散射点)和光纤下表面(无散射点)的散射率,当塑料光纤直径为1 mm时,得到优化后的正四棱锥散射点的底边宽度和深度均为80μm.仿真结果表明,光纤下表面散射光的光束发散角在垂直于光纤方向约为40°,在平行于光纤方向约为110°,经过焦距为50 mm的投射镜会聚后的光带宽度约为0.3 mm,可以满足裂隙灯显微镜的要求. 展开更多
关键词 裂隙光源 塑料光纤 微结构散射点 侧面发光塑料光纤
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Lab-on-Fiber Technology: a New Avenue for Optical Nanosensors 被引量:7
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作者 Marco CONSALES Marco PISCO Andrea CUSANO 《Photonic Sensors》 SCIE EI CAS 2012年第4期289-314,共26页
The "lab-on-fiber" concept envisions novel and highly functionalized technological platforms completely integrated in a single optical fiber that would allow the development of advanced devices, components and sub-s... The "lab-on-fiber" concept envisions novel and highly functionalized technological platforms completely integrated in a single optical fiber that would allow the development of advanced devices, components and sub-systems to be incorporated in modem optical systems for communication and sensing applications. The realization of integrated optical fiber devices requires that several structures and materials at nano- and micro-scale are constructed, embedded and connected all together to provide the necessary physical connections and light-matter interactions. This paper reviews the strategies, the main achievements and related devices in the lab-on-fiber roadmap discussing perspectives and challenges that lie ahead. 展开更多
关键词 Lab-on-fiber all-in-fiber devices optical fiber sensors and devices microstructured fiber Bragg gratings microstructured optical fibers multimaterial and multifunctional fibers
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Deep-learning cell imaging through Anderson localizing optical fiber 被引量:4
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作者 Jian Zhao Yangyang Sun +5 位作者 Hongbo Zhu Zheyuan Zhu Jose E.Antonio-Lopez Rodrigo Amezcua Correa Shuo Pang Axel Schulzgen 《Advanced Photonics》 EI CSCD 2019年第6期7-18,共12页
We demonstrate a deep-learning-based fiber imaging system that can transfer real-time artifact-free cell images through a meter-long Anderson localizing optical fiber.The cell samples are illuminated by an incoherent ... We demonstrate a deep-learning-based fiber imaging system that can transfer real-time artifact-free cell images through a meter-long Anderson localizing optical fiber.The cell samples are illuminated by an incoherent LED light source.A deep convolutional neural network is applied to the image reconstruction process.The network training uses data generated by a setup with straight fiber at room temperature(∼20°C)but can be utilized directly for high-fidelity reconstruction of cell images that are transported through fiber with a few degrees bend or fiber with segments heated up to 50°C.In addition,cell images located several millimeters away from the bare fiber end can be transported and recovered successfully without the assistance of distal optics.We provide evidence that the trained neural network is able to transfer its learning to recover images of cells featuring very different morphologies and classes that are never“seen”during the training process. 展开更多
关键词 fiber imaging cell imaging deep learning microstructured optical fiber transverse Anderson localization.
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Numerical Investigation Into a Surface Plasmon Resonance Sensor Based on Optical Fiber Microring
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作者 Chunliu ZHAO Yanru WANG +1 位作者 Dongning WANG Zhewen DING 《Photonic Sensors》 SCIE EI CAS CSCD 2017年第2期105-112,共8页
A reflective surface plasmon resonance (SPR) sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fun... A reflective surface plasmon resonance (SPR) sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fundamental mode of a thin-core fiber (TCF). The refractive index (RI) sensing can be achieved as the surface plasmons are sensitive to changes in the refrective index of the analyte. Numerical simulation results show that the resonance spectrum shifts toward the shorter wavelength gradually when the analyte refractive index increases from 1.0 to 1.33, whereas it shifts toward the longer wavelength gradually when the analyte refractive index increases from 1.33 to 1.43, and there is a turning point at the refractive index value of 1.33. The highest sensitivity achieved is up to 2.30×10^3nm/RIU near the refractive index value of 1.0. Such a compact sensor has potential for gaseous substance monitoring. 展开更多
关键词 fiber optics surface plasmons SENSORS microstructurE
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高保偏聚合物光子晶体光纤的化学制备技术研究 被引量:18
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作者 张亚妮 王丽莉 +3 位作者 王学忠 任立勇 赵卫 苗润才 《光子学报》 EI CAS CSCD 北大核心 2006年第9期1349-1353,共5页
研究了大尺寸高保偏聚合物光子晶体光纤(polymerPhotonicCrystalFibers,pPCFs)预制棒的化学原位制备技术.采用预聚物浇铸后加热聚合方法,成功制备了具有高保偏性能的光纤预制棒,给出了聚合反应的最佳条件.对此预制棒进行二次拉伸及光学... 研究了大尺寸高保偏聚合物光子晶体光纤(polymerPhotonicCrystalFibers,pPCFs)预制棒的化学原位制备技术.采用预聚物浇铸后加热聚合方法,成功制备了具有高保偏性能的光纤预制棒,给出了聚合反应的最佳条件.对此预制棒进行二次拉伸及光学和化学性质的测试表明,该方法得到的预制棒力学结构稳定、光学透明度高,且拉伸所得光纤微结构保持完好、微孔坍塌率低、非固有损耗小.若在聚合反应体系中加入适量的激光染料或其它稀土有机螯合物等物质,可得到具有荧光性的高保偏聚合物光子晶体光纤预制棒,为保偏型聚合物光子晶体光纤激光器的研制提供新材料. 展开更多
关键词 光纤与光通信 高保偏 光子晶体光纤 聚合物 化学制备 显微结构
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基于表面开孔光纤的集成式亚硝酸盐微流荧光传感器 被引量:8
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作者 赵恩铭 李恩涛 +4 位作者 滕平平 刘春兰 郭小慧 李松 杨兴华 《光学精密工程》 EI CAS CSCD 北大核心 2015年第8期2158-2163,共6页
利用中空悬挂芯光纤研制了一种将荧光猝灭反应区建立在空心光纤内部的光纤集成荧光在线微流传感器。利用CO2激光器在光纤表面刻蚀微孔,使得试剂可由微孔注入光纤内部并混合形成稳定的微流。在悬挂芯光纤纤芯倏逝场的激发下,指示剂分子... 利用中空悬挂芯光纤研制了一种将荧光猝灭反应区建立在空心光纤内部的光纤集成荧光在线微流传感器。利用CO2激光器在光纤表面刻蚀微孔,使得试剂可由微孔注入光纤内部并混合形成稳定的微流。在悬挂芯光纤纤芯倏逝场的激发下,指示剂分子产生荧光,所产生的荧光被耦合到纤芯内部并在出射端被检测。文中利用光纤内部的荧光猝灭反应实验确定了亚硝酸盐溶液的浓度。结果显示:微流可在短时间通过光纤,传感器能以较快的速度检测溶液浓度。另外,当亚硝酸盐溶液的浓度为0.1-2.6mmol/L时,荧光猝灭程度与溶液浓度呈较好的线性关系,结果证明了该集成式光纤内微流控传感器方案用于微量荧光检测的可行性。 展开更多
关键词 微结构光纤 光纤集成 光纤传感器 荧光传感器 微流传感器
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不同品种水泥的光纤导光混凝土抗侵蚀性能 被引量:8
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作者 王信刚 王凯 +1 位作者 陈方斌 叶栩娜 《江苏大学学报(自然科学版)》 EI CAS CSCD 北大核心 2014年第4期470-473,478,共5页
分别用普通硅酸盐(P·O)水泥和快硬硫铝酸盐(R·SAC)水泥作基体制备光纤导光混凝土,进行了抗硫酸盐侵蚀和抗碱溶液侵蚀试验,采用X射线衍射仪和环境扫描电镜,研究了不同品种水泥制备光纤导光混凝土的抗侵蚀性能和微观结构.结果表... 分别用普通硅酸盐(P·O)水泥和快硬硫铝酸盐(R·SAC)水泥作基体制备光纤导光混凝土,进行了抗硫酸盐侵蚀和抗碱溶液侵蚀试验,采用X射线衍射仪和环境扫描电镜,研究了不同品种水泥制备光纤导光混凝土的抗侵蚀性能和微观结构.结果表明:碱溶液养护对R·SAC水泥为基体的光纤导光混凝土的强度具有更为明显的破坏作用;R·SAC水泥为基体的光纤导光混凝土在碱溶液中养护后,其外观泛黄现象和腐蚀程度最为明显,且碱溶液对光纤导光混凝土的腐蚀程度远大于盐溶液;光纤导光混凝土在碱溶液中养护后,其光纤与基体间界面处结合不够紧密,出现较明显缝隙或微缺陷,可导致光纤导光混凝土力学性能下降;光纤导光混凝土水化产物中存在团絮状C-SH凝胶、针棒状钙矾石、柱状石膏、六方薄板状羟钙石和球状铝胶,它们相互交织,结合比较致密. 展开更多
关键词 导光混凝土 水泥 光纤 抗侵蚀 微观结构
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新型微结构光纤分布式声波传感技术及应用 被引量:12
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作者 刘德明 贺韬 +1 位作者 许志杰 孙琪真 《应用科学学报》 CAS CSCD 北大核心 2020年第2期296-309,共14页
介绍了一种新型分布式微结构光纤及微结构光纤分布式声波传感技术.通过在普通通信光纤的纤芯采用精密光刻技术连续制备纵向微结构散射单元,形成一种新型分布式微结构光纤(distributed microstructure optical fiber,DMOF).基于这种DMOF... 介绍了一种新型分布式微结构光纤及微结构光纤分布式声波传感技术.通过在普通通信光纤的纤芯采用精密光刻技术连续制备纵向微结构散射单元,形成一种新型分布式微结构光纤(distributed microstructure optical fiber,DMOF).基于这种DMOF研制的微结构光纤分布式声波传感系统(microstructure fiber distributed acoustic sensor,MF-DAS),采用微结构光散射增强,MF-DAS传感信号的信噪比得到大幅提升;通过微结构光纤链路均衡,大幅度降低MF-DAS近远端传感信号差值;提出微结构光时域反射(microstructure optical time domain reflection,M-OTDR)时隙分插复用扩频,显著增大了分布式声波探测频响带宽.这种新型的MF-DAS系统具备高灵敏、大尺度、宽频响等优越性能,在地下及水下声波信息获取、重大基础设施内部损伤探测与外部侵害安全监测等领域具有十分广阔的应用前景. 展开更多
关键词 分布式微结构 微结构光纤 光纤传感 分布式声波传感 微结构光时域反射
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光纤化学传感技术研究近况 被引量:3
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作者 汪舰 魏建平 +3 位作者 杨波 高志扬 张利伟 杨学峰 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2014年第8期2035-2039,共5页
光纤化学传感器作为传感器的一个重要分支,结合了化学和光学的相关技术,将化学制膜、光纤技术以及化学分析中的分光光度法、拉曼光谱、荧光光谱、折射率检测等方法相融合,以其微型化,抗电磁干扰,传输信息量大,拥有自身参比等特点不断向... 光纤化学传感器作为传感器的一个重要分支,结合了化学和光学的相关技术,将化学制膜、光纤技术以及化学分析中的分光光度法、拉曼光谱、荧光光谱、折射率检测等方法相融合,以其微型化,抗电磁干扰,传输信息量大,拥有自身参比等特点不断向前发展。简要综述了光纤化学传感技术研究近况和未来的发展趋势。重点对光纤pH化学传感器、光纤离子化学传感器和光纤气体化学传感器进行了介绍。简要分析了常见的敏感膜制备方法如化学键合法和溶胶凝胶(sol-gel)等方法。新型光纤——微结构光纤的出现为光纤化学传感器开辟了新的发展方向。由于其具有大的内表面积,结构设计灵活多样,光纤内部提供感应场所等特点,快速度成为光纤化学传感器的重要发展方向和研究热点。对微结构光纤衍生而来的新型光纤化学传感器进行了详细评述,最后对光纤化学传感器的未来进行展望。 展开更多
关键词 光纤化学传感 化学传感 微结构光纤
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微结构光纤表面等离子体共振传感器研究 被引量:2
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作者 闫培光 邢凤飞 +1 位作者 阮双琛 李乙钢 《深圳大学学报(理工版)》 EI CAS 北大核心 2009年第1期16-19,共4页
采用有限元法模拟微结构光纤表面等离子体共振传感器.计算其共振波长和强度,为证实表面等离子体共振的产生,对比不同位置处传导模的分布.环形大孔中液体样品的折射率提高后,共振波长向长波移动,且共振峰值强度增大.该微结构光纤表面等... 采用有限元法模拟微结构光纤表面等离子体共振传感器.计算其共振波长和强度,为证实表面等离子体共振的产生,对比不同位置处传导模的分布.环形大孔中液体样品的折射率提高后,共振波长向长波移动,且共振峰值强度增大.该微结构光纤表面等离子体传感器对折射率变化的灵敏度达到10-4. 展开更多
关键词 表面等离子体共振 微结构光纤 传感器 折射率 共振波长
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