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Recent Advances in Phase-Sensitive Optical Time Domain Reflectometry (Ф-OTDR)

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Photonic Sensors 2021年第1期11卷 1-30页

作者： Yunjiang RAO Zinan WANG Huijuan WU zengling ran Bing HAN Fiber Optics Research Center(FORC) Key Lab of Optical Fiber Sensing&CommunicationsUniversity of Electronic Science&Technology of ChinaChengdu611731China Research Center for Optical Fiber Sensing Zhejiang LaboratoryHangzhou310000China PetroChina Optical Science&Technology(Chengdu)Ltd. Chengdu611731China

Phase-sensitive optical time domain reflectometry(Ф-OTDR)is an effective way to detect vibrations and acoustic waves with high sensitivity,by interrogating coherent Rayleigh backscattering light in sensing *** particular,fiber-optic distributed acoustic sensing(DAS)based on theФ-OTDR with phase demodulation has been extensively studied and widely used in intrusion detection,borehole seismic acquisition,structure health monitoring,etc.,in recent years,with superior advantages such as long sensing range,fast response speed,wide sensing bandwidth,low operation cost and long service *** advances in research and development(R&D)ofФ-OTDR have been made since *** this review,we present a historical review ofФ-OTDR and then summarize the recent progress ofФ-OTDR in the Fiber Optics Research Center(FORC)at University of Electronic Science and Technology of China(UESTC),which is the first group to carry out R&D ofФ-OTDR and invent ultra-sensitive DAS(uDAS)seismometer in China which is elected as one of the ten most significant technology advances of PetroChina in *** can be seen that theФ-OTDR/DAS technology is currently under its rapid development stage and would reach its climax in the next 5 years.

关键词： Distributed optical fiber sensing phase-sensitive optical time domain reflectometry Rayleigh backscattering optical phase demodulation distributed acoustic sensing long-distance sensing artificial intelligence

Fiber-Optic Microstructure Sensors:A Review

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Photonic Sensors 2021年第2期11卷 227-261页

作者： zengling ran Xiu HE Yunjiang RAO Dong SUN Xiaojuan QIN Debiao ZENG Wangwei CHU Xiankun LI Yabin WEI Fiber Optics Research Center(FORC) Key Laboratory of Optical Fiber Sensing&CommunicationsUniversity of Electronic Science and Technology of ChinaChengdu 611731China Chengdu Aircraft Industrial Group Co. Ltd.Chengdu 610092China

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)*** FOM sensor has been introduced in the terms of structure types,fabrication methods,and their sensing *** 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 *** also discuss the future development of FOM sensors.

关键词： Fiber-optic sensors Fabry-Perot,fiber Bragg grating long period grating Mach-Zehndcr interferometer Michelson interferometer Sagnac interferometer

Design of an All-Fiber Fabry-Perot Sensor for Strain Measurement in Radiative Environment

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Photonic Sensors 2022年第4期12卷 81-90页

作者： Tingting YANG zengling ran Xiu HE Lupeng GAN Zhengxi HE Jialiang ZHU Peng HE Zhuoyue LI Dong SUN Key Laboratory of Optical Fiber Sensing&Communications(Ministry of Education) University of Electronic Science and Technology of ChinaChengdu 611731China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

A length-matched micro Fabry-Perot(FP)interferometer is proposed for strain measurement under irradiation *** simulation shows that a well length-matched FP sensor can achieve a very low drift of the cavity length and strain sensitivity in irradiation *** experiment,such an FP cavity is realized by laser *** shows a low cavity length drift of−0.037μm and a strain sensitivity deviation of 0.52%,respectively,under gamma ***,the intensity of interference fringes is also *** a result,such a length-matched FP cavity is a very promising candidate for strain sensing in radiative environments.

关键词： Gamma radiation Fabry-Perot sensor radiation-induced compaction strain sensing

Study of the Sensing Characteristics of Irradiated Fiber Bragg Gratings and Fabry-Perot Interferometers Under Gamma Radiation

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Photonic Sensors 2022年第1期12卷 91-98页

作者： Zhuoyue LI zengling ran Xianguo QING Zhengxi HE Yaqin XIAO Tingting YANG Xiu HE Jialiang ZHU Peng HE Sijie XU Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China Key Laboratory of Optical Fiber Sensing&Communications(Ministry of Education) University of Electronic Science and Technology of ChinaChengdu 611731China China Aerodynamics Research and Development Center Mianyang 621000China

The sensing characteristics of irradiated fiber Bragg gratings(FBGs)and Fabry-Perot interferometers(FPIs)were investigated under a 2MGy dose of gamma *** study found that the pressure sensitivity of FP sensors after irradiation was stable,while the temperature sensitivity of FBG sensors was unstable,and both wavelengths displayed a *** findings offer the possibility for the application of FP pressure sensors in the gamma radiation environments,and FBG sensors require further research to be suitable for application in the nuclear radiation environments.

关键词： Fiber Bragg gratings Fabry-Perot interferometers gamma radiation

Fiber-Optic Raman Spectrum Sensor for Fast Diagnosis of Esophageal Cancer

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Photonic Sensors 2019年第1期9卷 53-59页

作者： Jianhua DAI Xiu HE Zhuoyue LI Kang LI Tingting YANG zengling ran Lijian YIN Yao CHEN Xiang ZOU Dianchun FANG Guiyong PENG Institute of Digestive Disease Southwest HospitalArmy Medical UniversityChongqing 40038China Fiber Optics Research Center Key Laboratory of Optical Fiber Sensing & Communications (Ministry of Education) University of Electronic Science and Technology of ChinaChengdu 611731China Zolix Instruments Co. Ltd.Beijing 101102China

A fiber-optic Raman spectrum sensor system is used for the fast diagnosis of esophageal cancer during clinical endoscopic *** system contains a 785nm exciting laser,a Raman fiber-optic probe with 7 large core fibers and a focus lens,and a highly sensitive spectrum *** Raman spectrum of the tissue could be obtained within 1 second by using such a system. A signal baseline removal and denoising technology is used to improve the signal quality.A novel signal feature extraction method for differentiating the normal and esophageal cancer tissues is proposed,based on the differences in half-height width(HHW)in 1200cm^-1 to 1400cm^-1 frequency band and the ratios of the spectral integral energy between 1600cm^-1-1700cm^-1 and 1500cm^-1- 1600cm^-1 *** shows a high specificity and effectivity for the diagnosis of esophageal cancer.

关键词： Fiber-optic Raman spectrum esophageal cancer

Kilometers Long Graphene-Coated Optical Fibers for Fast Thermal Sensing

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Research 2021年第1期2021卷 286-294页

作者： Yiyong Guo Bing Han Junting Du Shanshan Cao Hua Gao Ning An Yiwei Li Shujie An zengling ran Yue Lin Wencai Ren Yunjiang Rao Baicheng Yao Key Laboratory of Optical Fiber Sensing and Communications(Education Ministry of China) University of Electronic Science and Technology of ChinaChengdu 611731China Research Centre of Optical Fiber Sensing Zhejiang LaboratoryHangzhou 310000China Optical Fiber Co. Ltd.ZTT GroupNantong 226009China Carbonene Technology Co. LtdDeyang 618000China Optical Science and Technology Ltd. China National Petroleum CorporationChengdu 610041China Cavendish Laboratory University of CambridgeCB30HEUK Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The combination of optical fiber with graphene has greatly expanded the application regimes of fiber optics,from dynamic optical control and ultrafast pulse generation to high precision ***,limited by fabrication,previous graphene-fiber samples are typically limited in the micrometer to centimeter scale,which cannot take the inherent advantage of optical fibers—longdistance optical ***,we demonstrate kilometers long graphene-coated optical fiber(GCF)based on industrial graphene nanosheets and coating *** GCF shows unusually high thermal diffusivity of 24.99 mm^(2) s^(-1) in the axial direction,measured by a thermal imager *** enables rapid thermooptical response both in optical fiber Bragg grating sensors at one point(18-fold faster than conventional fiber)and in long-distance distributed fiber sensing systems based on backward Rayleigh scattering in optical fiber(15-fold faster than conventional fiber).This work realizes the industrial-level graphene-fiber production and provides a novel platform for two-dimensional material-based optical fiber sensing applications.

关键词： fiber scattering faster

基于光纤环形激光器和光放大的100km光纤布拉格光栅传感系统

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光学学报 2007年第8期27卷 1393-1396页

作者：罗小东饶云江冉曾令电子科技大学宽带光纤传输和通信网技术教育部重点实验室成都610054

在基于掺铒光纤-拉曼混合放大的可调光纤环形激光器的光纤布拉格光栅(FBG)传感系统结构基础上,提出了延长传感距离的新方法。该方法以环形掺铒光纤激光器作为光源,采用双波长拉曼放大的方法对信号进行低噪声的双向放大,系统中间的两段... 详细信息

在基于掺铒光纤-拉曼混合放大的可调光纤环形激光器的光纤布拉格光栅(FBG)传感系统结构基础上,提出了延长传感距离的新方法。该方法以环形掺铒光纤激光器作为光源,采用双波长拉曼放大的方法对信号进行低噪声的双向放大,系统中间的两段掺铒光纤再利用剩余的抽运功率产生自发辐射光和放大传感信号,使得整个系统能够在超长的传感距离上获得很高的信噪比。实验表明使用一只40 mW的掺铒光纤放大(EDFA)抽运源、一只170 mW的拉曼抽运源和一只2 W的拉曼抽运源,可以使整个系统的传感距离达到100km,并且传感系统的光纤布拉格光栅反射信号均能获得超过57 dB的优良信噪比,从而实现在超长距离上的光纤布拉格光栅传感。

关键词：光通信光纤传感器光纤布拉格光栅光纤激光器拉曼放大掺铒光纤放大

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长周期保偏光纤光栅的偏振特性研究

光子学报 2006年第12期35卷 1884-1887页

作者：莫秋菊饶云江冉曾令朱涛重庆大学光电工程学院重庆400030 成都电子科技大学通信与信息工程学院成都610015

用高频CO2激光脉冲写入法在熊猫保偏光纤上写入长周期光纤光栅,并对其偏振特性进行了全面的试验研究·试验结果表明,在输入椭圆偏振光偏振角度0到2π的变化范围内,高频CO2激光脉冲写入法在熊猫保偏光纤上写入的长周期光纤光栅谐振峰幅... 详细信息

用高频CO2激光脉冲写入法在熊猫保偏光纤上写入长周期光纤光栅,并对其偏振特性进行了全面的试验研究·试验结果表明,在输入椭圆偏振光偏振角度0到2π的变化范围内,高频CO2激光脉冲写入法在熊猫保偏光纤上写入的长周期光纤光栅谐振峰幅值会随着入射椭圆偏振光偏振角度的改变发生以π为周期的周期性变化,并且相邻两谐振峰幅值变化趋势相反,相位差为π.在相同偏振角度下将两谐振峰幅值相减,其差值呈近似于锯齿波的周期性变化,周期也为π·在没有发生模式干扰的情况下,谐振峰波长几乎没有发生漂移·基于模式耦合理论,文中还对所观察到的试验现象进行了定性的理论解释·

关键词：导波光纤光学光纤传感长周期光纤光栅保偏光纤光栅偏振特性

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新型高灵敏分布式光纤入侵监测系统

仪器仪表学报 2009年第6期30卷 1123-1128页

作者：罗俊饶云江岳剑锋冉曾令电子科技大学宽带光纤传输和通信网技术教育部重点实验室成都610054 重庆大学光电技术与系统教育部重点实验室重庆400044

首次提出了一种基于纤维增强塑料(FRP)传感光缆的新型高灵敏相位敏感光时域反射计(Φ-OTDR)分布式光纤入侵监测系统。该方案中传感系统光源采用价格比较便宜且使用比较广泛的窄线宽DFB激光器,并采用光纤饱和体吸收法来压窄激光器的线宽... 详细信息

首次提出了一种基于纤维增强塑料(FRP)传感光缆的新型高灵敏相位敏感光时域反射计(Φ-OTDR)分布式光纤入侵监测系统。该方案中传感系统光源采用价格比较便宜且使用比较广泛的窄线宽DFB激光器,并采用光纤饱和体吸收法来压窄激光器的线宽以增强后向瑞丽散射光的干涉效果;在传感光缆部分使用新型的FRP封装的特殊传感光缆,该光缆拥有比普通通信光缆高得多的应力敏感性;并且应用小波分析方法对得到的传感信号进行降噪处理,有效地提高了系统的信噪比。通过以上改进提高了系统对微扰远程定位检测的准确度和灵敏度。实验结果表明该传感系统在2km和6km处均能获得较高信噪比的扰动信号,能有效地预报和定位微扰的发生,由于该系统成本得到有效的控制,可能是目前国际上性价比最好的Φ-OTDR分布式光纤入侵监测系统,可望在入侵监测中获得广泛的应用。

关键词：分布式光纤传感器相位敏感光时域反射计光纤饱和体吸收法入侵监测小波分析