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Experimental Measurements of the Sensitivity of Fiber-optic Bragg Grating Sensors with a Soft Polymeric Coating under Mechanical Loading,Thermal and Magnetic under Cryogenic Conditions 被引量:2
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作者 关明智 王省哲 +2 位作者 辛灿杰 周又和 马力祯 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第1期140-144,共5页
The strain and temperature sensing performance of fiber-optic Bragg gratings (FBGs) with soft polymeric coating, which can be used to sense internal strain in superconducting coils, are evaluated under variable cryo... The strain and temperature sensing performance of fiber-optic Bragg gratings (FBGs) with soft polymeric coating, which can be used to sense internal strain in superconducting coils, are evaluated under variable cryogenic field and magnetic field. The response to a temperature and strain change of coated-soft polymeric FBGs is tested by comparing with those of coated-metal FBGs. The results indicate that the coated-soft polymeric FBGs can freely detect temperature and thermal strain, their At variable magnetic field, the tested results indicate accuracy and repeatability are also discussed in detail. that the cross-coupling effects of FBGs with different matrixes are not negligible to measure electromagnetic strain during fast excitation. The present results are expected to be able to provide basis measurements on the strain of pulsed superconducting magnet/cable (cable- around-conduit conductors, cable-in-conduit conductors), independently or utilized together with other strain measurement methods. 展开更多
关键词 FBG net Experimental Measurements of the Sensitivity of fiber-optic Bragg grating Sensors with a Soft Polymeric Coating under Mechanical Loading Thermal and Magnetic under Cryogenic Conditions
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Recent Progress in Multiparameter Measurement Based on Extrinsic Fiber-Optic Fabry-Perot Interferometers and Fiber Gratings
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作者 Yun Jiang Rao Department of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期837-838,共2页
This paper presents a review of recent progress in simultaneous measurement of multiparameters including strain, temperature, vibration, transverse load, based on the combinations of extrinsic fiber-optic Fabry-Perot ... This paper presents a review of recent progress in simultaneous measurement of multiparameters including strain, temperature, vibration, transverse load, based on the combinations of extrinsic fiber-optic Fabry-Perot interferometers and fiber gratings. 展开更多
关键词 EFPI AS FBG Recent Progress in Multiparameter Measurement Based on Extrinsic fiber-optic Fabry-Perot Interferometers and Fiber gratings in on
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传感用光纤光栅写入技术的研究和发展 被引量:4
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作者 张向东 李育林 +3 位作者 王卫平 洪新华 彭文达 武翠琴 《激光技术》 CAS CSCD 北大核心 2004年第5期506-509,520,共5页
为克服目前传感应用领域借用传感性能并不优异的通信用光纤光栅的不足 ,在总结传感用光纤光栅制作技术的特点和要求基础上 ,对近年来传感用光纤光栅的制作技术进行了系统回顾 ,具体分析了耐高温、高机械强度、增敏 /去敏等常见传感用布... 为克服目前传感应用领域借用传感性能并不优异的通信用光纤光栅的不足 ,在总结传感用光纤光栅制作技术的特点和要求基础上 ,对近年来传感用光纤光栅的制作技术进行了系统回顾 ,具体分析了耐高温、高机械强度、增敏 /去敏等常见传感用布喇格光纤光栅的写入技术以及紫外曝光、机械变形、红外激光逐点写入等传感用长周期光纤光栅的制作方法 ,最后对传感用光纤光栅制作技术的发展方向进行了预测。 展开更多
关键词 光纤光栅 布喇格光纤光栅 长周期光纤光栅 制作技术 传感器
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Fiber-Optic Microstructure Sensors:A Review 被引量:3
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作者 Zengling RAN Xiu HE +6 位作者 Yunjiang RAO Dong SUN Xiaojuan QIN Debiao ZENG Wangwei CHU Xiankun LI Yabin WEI 《Photonic Sensors》 SCIE EI CSCD 2021年第2期227-261,共35页
This paper reviews a wide variety of fiber-optic microstructure(FOM)sensors,such as fiber Bragg grating(FBG)sensors,long-period fiber grating(LPFG)sensors,Fabry-Perot interferometer(FPI)sensors,Mach-Zchnder interferom... This paper reviews a wide variety of fiber-optic microstructure(FOM)sensors,such as fiber Bragg grating(FBG)sensors,long-period fiber grating(LPFG)sensors,Fabry-Perot interferometer(FPI)sensors,Mach-Zchnder interferometer(MZI)sensors,Michelson interferometer(MI)sensors,and Sagnac interferometer(SI)sensors.Each FOM sensor has been introduced in the terms of structure types,fabrication methods,and their sensing applications.In addition,the sensing characteristics of different structures under the same type of FOM sensor are compared,and the sensing characteristics of the all FOM sensors,including advantages,disadvantages,and main sensing parameters,are summarized.We also discuss the future development of FOM sensors. 展开更多
关键词 fiber-optic sensors Fabry-Perot fiber Bragg grating long period grating Mach-Zehndcr interferometer Michelson interferometer Sagnac interferometer
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Low cost, practical, all-digital open-loop fiber-optic gyroscope 被引量:2
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作者 杨远洪 张惟叙 +1 位作者 马静 陈新军 《Chinese Optics Letters》 SCIE EI CAS CSCD 2003年第10期567-569,共3页
A novel all-digital scheme for open-loop fiber-optic gyroscope (POG), where only two key points of output wave were digitized directly, has been proposed. A control equation, with which the modulation depth of PZT mod... A novel all-digital scheme for open-loop fiber-optic gyroscope (POG), where only two key points of output wave were digitized directly, has been proposed. A control equation, with which the modulation depth of PZT modulator is stable when setting the modulation depth as 4.35 and a calculation equation, with which the Sagnac phase can be worked out, are derived. A modulation depth control and an automatic correlation sampling and a gain control technology were induced. A photo-type FOG was made and tested. The good performance was achieved. 展开更多
关键词 fog in OPEN it Low cost all-digital open-loop fiber-optic gyroscope PRACTICAL BE of
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Robust Fiber-Optic Sensor Networks 被引量:1
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作者 Rosa Ana PEREZ-HERRERA Montserrat FERNANDEZ-VALLEJO Manuel LOPEZ-AMO 《Photonic Sensors》 SCIE EI CAS 2012年第4期366-380,共15页
The ability to operate despite failure will become increasingly important as the use of optical sensor networks grows, and the amount of sensing information to be handled by a sensor network is increasing, especially ... The ability to operate despite failure will become increasingly important as the use of optical sensor networks grows, and the amount of sensing information to be handled by a sensor network is increasing, especially for safety and security applications. In this review, the four categories of protection to allow service to be reestablished after a failure (dedicated/shared and line/path) are thoroughly discussed. This paper also presents an overview of the most representative robust fiber-optic sensor systems, discussing their schemes, pros and cons. 展开更多
关键词 SELF-HEALING robust RESILIENCE fiber-optic sensor multiplexing fiber Bragg gratings (FBGs) fiber-optic networks
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A novel temperature-compensation method based on correlation analysis for multi-FOG INS 被引量:1
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作者 Longjie TIAN Yanxiong NIU +3 位作者 Chenwei HUANG Haoyang LI Yang PANG Yanqiang YANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第6期279-287,共9页
Aimed at improving the bias stability of Fiber-Optic Gyroscope(FOG)-based inertial navigation systems in environments of various ambient temperatures,a novel temperaturecompensation method based on a correlation analy... Aimed at improving the bias stability of Fiber-Optic Gyroscope(FOG)-based inertial navigation systems in environments of various ambient temperatures,a novel temperaturecompensation method based on a correlation analysis of the same batch of FOGs is proposed.The empirical mode decomposition method was employed to filter the high-frequency noises of the FOGs.Then,the correlation information of the multiple FOGs was used to analyze the feasibility of the method.Eventually,the same residual error of the FOGs was compensated via the simple piecewise linear models.The experimental results indicate that excellent compensation effects for both high-and low-accuracy FOGs are achieved using the proposed method.Specifically,the accuracies of high-accuracy FOGs are improved by approximately 33.9%,20%,and 31.2%,while those of low-accuracy FOGs are improved by approximately 39.1%,20.8%,and 26.1%.The method exhibits the merits of simplicity,validity,and stability,and thus is expected to be widely used in engineering applications. 展开更多
关键词 Correlation methods Empirical mode decomposition Inertial navigation systems TEMPERATURE fiber-optic Gyroscope(fog)
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Crack monitoring using multiple smart materials;fiber-optic sensors&piezo sensors
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作者 Muneesh Maheshwari Venu G.M.Annamdas +2 位作者 John H.L.Pang Anand Asundi Swee C.Tjin 《International Journal of Smart and Nano Materials》 SCIE EI 2017年第1期41-55,共15页
This article focuses on health monitoring of structures using multiple smart materials.In this research,two fiber-optic sensors,namely fiber Bragg grating(FBG)and fiber-optic polarimetric sensor(FOPS),are investigated... This article focuses on health monitoring of structures using multiple smart materials.In this research,two fiber-optic sensors,namely fiber Bragg grating(FBG)and fiber-optic polarimetric sensor(FOPS),are investigated for damage detection in the beam specimen.FBG is used for local strain measurement while FOPS is used for global strain measurement.Both FBG and FOPS show significant changes in the strain due to damages in the specimen.Also,at the center of the specimen,piezoelectric wafer active sensor(PWAS)is attached.The electromechanical admittance(EMA)signature of the specimen beam is recorded by PWAS.The changes in the amplitudes of the peaks obtained at various frequencies in this EMA signature are analyzed,and it is shown that the peak amplitudes respond differently to damages and to change in loading.Thus,multiple smart materials(FBG,FOPS,and PWAS)are used to get improved information on the health of the beam. 展开更多
关键词 fiber-optic polarimetric sensor(FOPS) fiber Bragg grating(FBG) piezoelectric wafer active sensor(PWAS) crack/damage monitoring
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Efficiently Writing Bragg Grating in High-Birefringence Elliptical Microfiber for Label-Free Immunosensing with Temperature Compensation 被引量:1
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作者 Peng Xiao Zhiyuan Xu +5 位作者 Deming Hu Lili Liang Lipeng Sun Jie Li Yang Ran Bai‑Ou Guan 《Advanced Fiber Materials》 CAS 2021年第5期321-330,共10页
Immunosensor is a powerful tool in healthcare and clinic,food and drug industry,and environmental protection.Label-free fiber-optic immunosensors have shown a myriad of advantages,such as high sensitivity,anti-electro... Immunosensor is a powerful tool in healthcare and clinic,food and drug industry,and environmental protection.Label-free fiber-optic immunosensors have shown a myriad of advantages,such as high sensitivity,anti-electromagnetic interference,and afield measurement via the fiber network.However,the fiber-optic based sensor may bear the temperature cross-talk,especially under the warming condition for bio-activating the immune molecules.In this study,we proposed a highly birefringent microfiber Bragg grating for immunosensing with the temperature-compensation.The birefringent microfiber was drawn from the elliptical cladding multimode fiber that was ablated by the CO2 laser.The considerably large energy overlap region offered by the original multimode fiber favored the efficient inscription of FBG with high reflectivity.The dual reso-nances derived by the orthogonal polarization states presented similar temperature responsivities but significantly different ambient refractive index sensitivities,allowing the temperature-compensational RI sensing.The human immunoglobulin G(IgG)molecules were anchored on the surface of the microfiber grating probe by the covalent functionalization technique to enable the specific detection of the anti-IgG molecule.The proposed method promises a high-efficiency and low-cost design for the microfiber Bragg grating-based biosensor without being subjected to the temperature cross-sensitivity. 展开更多
关键词 fiber-optic biosensors MICROFIBER Fiber Bragg grating BIREFRINGENCE Temperature compensation IMMUNOSENSING
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Dynamic Gratings in Optical Fibers: Synthesis and Sensing Applications
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作者 Zuyuan HE Kazuo HOTATE 《Photonic Sensors》 SCIE EI CAS 2012年第1期60-64,共5页
We proposed two schemes of generating and localizing dynamic gratings in optical fibers: one is based on the gain saturation in erbium-doped fiber; the other is based on Brillouin scattering in the fiber. By using th... We proposed two schemes of generating and localizing dynamic gratings in optical fibers: one is based on the gain saturation in erbium-doped fiber; the other is based on Brillouin scattering in the fiber. By using these dynamic gratings, fully distributed strain/temperature sensors have been demonstrated. In this presentation, we review the principles, basic schemes, and experimental demonstrations of the novel dynamic grating techniques. 展开更多
关键词 Dynamic grating fiber-optic sensor DISTRIBUTED strain sensor temperature sensor
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Strain Sensor Based on Embedded Fiber Bragg Grating in Thermoplastic Polyurethane Using the 3D Printing Technology for Improved Sensitivity
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作者 Harith AHMAD Mohamad Ashraff ALIAS +6 位作者 Mohammad Faizal ISMAIL Nor Najwa ISMAIL Muhammad Khairol Annuar ZAINI Kok Sing LIM Gilberto BRAMBILLA Kenneth T.V.GRATTAN B.MAzizur RAHMAN 《Photonic Sensors》 SCIE EI CSCD 2022年第3期68-78,共11页
A new and easy-to-fabricate strain sensor has been developed,based on fiber Bragg grating(FBG)technology embedded into a thermoplastic polyurethane filament using a 3-dimensional(3D)printer.Taking advantage of the fle... A new and easy-to-fabricate strain sensor has been developed,based on fiber Bragg grating(FBG)technology embedded into a thermoplastic polyurethane filament using a 3-dimensional(3D)printer.Taking advantage of the flexibility and elastic properties of the thermoplastic polyurethane material,the embedding of the FBG provides durable protection with enhanced flexibility and sensitivity,as compared to the use of a bare FBG.Results of an evaluation of its performance have shown that the FBG sensors embedded in this way can be applied effectively in the measurement of strain,with an average wavelength responsivity of 0.0135 nm/cm of displacement for tensile strain and -0.0142 nm/cm for compressive strain,both showing a linearity value of up to 99%.Furthermore,such an embedded FBG-based strain sensor has a sensitivity of~1.74 times greater than that of a bare FBG used for strain measurement and is well protected and suitable for in-the-field use.It is also observed that the thermoplastic polyurethane based(TPU-based)FBG strain sensor carries a sensitivity value of~2.05 times higher than that of the polylactic acid based(PLA-based)FBG strain sensor proving that TPU material can be made as the material of choice as a“sensing”pad for the FBG. 展开更多
关键词 fiber-optic sensors fiber Bragg grating 3D printing technology multiple-point strain measurement
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光纤光栅在微波光子滤波器中的应用
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作者 祁春慧 裴丽 +2 位作者 郭兰 吴树强 赵瑞峰 《光纤与电缆及其应用技术》 2009年第2期1-3,14,共4页
近年来,光纤光栅以其波长选择性好等特性得到了广泛的应用,随着人们对宽带通信的不断需求,微波光子学也在不断发展,微波光子滤波器更是成为该领域的热点之一,不断有利用光纤光栅构成微波光子滤波器的报道。综合评述了几种典型光纤光栅... 近年来,光纤光栅以其波长选择性好等特性得到了广泛的应用,随着人们对宽带通信的不断需求,微波光子学也在不断发展,微波光子滤波器更是成为该领域的热点之一,不断有利用光纤光栅构成微波光子滤波器的报道。综合评述了几种典型光纤光栅构成微波光子滤波器的结构,并分析比较了各自的功能特点和不足。 展开更多
关键词 光纤光栅 滤波器 微波光子滤波器
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