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A Fresnel Reflection-Based optical fiber sensor System for Remote Refractive Index Measurement Using an OTDR

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Photonic sensors 2014年第1期4卷 48-52页

作者： Jianying Yuan Chunliu Zhao Manping Ye Juan Kang Zaixuan Zhang Shangzhong Jin Institute of Optoelectronic Technology China Jiliang UniversityHangzhou310018China

In this paper, we propose a Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using the optical time domain reflectometry technique as an interrogation method. The surrounding refractive index from a long distance away can be measured easily by using this sensor system, which operates based on testing the Fresnel reflection intensity from the fiber-sample interface. This system is a simple configuration, which is easy to handle. Experimental results showed that the range of this measurement could reach about 100.8km, and the refractive index sensitivities were from 38.71 dB/RIU to 304.89 dB/RIU in the refractive index （RI） range from 1.3486 to 1.4525.

关键词： Fresnel reflection optical fiber sensor remote measurement OTDR

Review of optical fiber sensor Network Technology Based on White Light Interferometry

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Photonic sensors 2021年第1期11卷 31-44页

作者： Wenchao LI Yonggui YUAN Jun YANG Libo YUAN The Key Lab of In-fiber Integrated Optics Ministry Education of ChinaHarbin Engineering UniversityHarbin150001China Photonics Research Center School of Electronic Engineering and AutomationGuilin University of Electronics TechnologyGuilin541004China

optical fiber sensor networks(OFSNs)provide powerful tools for large-scale buildings or long-distance sensing,and they can realize distributed or quasi-distributed measurement of temperature,strain,and other physical *** article provides some optical fiber sensor network technologies based on the white light interference *** discuss the key issues in the fiber white light interference network,including the topology structure of white light interferometric fiber sensor network,the node connection components,and evaluation of the maximum number of sensors in the network.A final comment about further development prospects of fiber sensor network is presented.

关键词： optical fiber sensor white light interference optical fiber sensor network(OFSN) multiplexed sensing system

Numerical Investigation of a Refractive Index SPR D-Type optical fiber sensor Using COMSOL Multiphysics

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Photonic sensors 2013年第1期3卷 61-66页

作者： D. F. SANTOS A. GUERREIRO J. M. BAPTISTA Centro de Ciēncias Exatas e da Engenharia Universidade da Madeira Funchal Portugal Faculdade de Ciēncias da Universidade do Porto Portugal INESC TEC Porto Portugal

Recently, many programs have been developed for simulation or analysis of the different parameters of light propagation in optical fibers, either for sensing or for communication purposes. In this paper, it is shown the COMSOL Multiphysics as a fairly robust and simple program, due to the existence of a graphical environment, to perform simulations with good accuracy. Results are compared with other simulation analysis, focusing on the surface plasmon resonance （SPR） phenomena for refractive index sensing in a D-type optical fiber, where the characteristics of the material layers, in terms of the type and thickness, and the residual fiber cladding thickness are optimized.

关键词： Refractive index sensor optical fiber sensor surface plasmon resonance light propagation simulation COMSOL Multiphysics graphical environment

Complete Phase-strain Model for Interferometric optical fiber sensor

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Semiconductor Photonics and Technology 1996年第3期2卷 189-193页

作者： YANG Jianliang XIANG Qing HUANG Dexiu(Huazhoug University of Science and Technology, Wuhan 430074. CHN)

The complete phase-strain model for arbitrarily configured singe-mode optical fiber in an arbitrary three-demensional strain field is derived. It includes all factors having influence on the optical phase such as the change in length, dispersion and birefringence. When simplified, our analysis is respectively consistent with the model of Sirkis and Haslach, Butter and Hocker.

关键词： optical fiber sensor Strain Dispersion

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An optical fiber sensor for Simultaneous Measurement of pO₂ and pH

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Open Journal of Applied Sciences 2023年第4期13卷 579-590页

作者： Baorong Fu Xianwen Zhang Huimin Cao Zhushanying Zhang Wuhan Great Sea Hi-Tech Co. Ltd Wuhan China Linyi Grepo Garden Machinery CO. LTD Linyi China College of Biomedical Engineering South-Central MinZu University Wuhan China

Whether in the monitoring of critically ill patients such as shock, respiratory failure, brain injury, or in major anesthesia surgeries, it is necessary to evaluate the patient’s pO2 and pH. An optical fiber sensor presented is capable of monitoring the presence of oxygen partial pressure (pO2) and pH in the real-time. The sensor is based on fluorescence sensing of polymer immobilized in the oxygen/pH-sensitive membranes and covalently attached to the optical fiber probe. The design of this sensor uses LED as light source, which is an excitation light source, inducing specific wavelengths of fluorescence on the oxygen/pH-sensitive membrane. The intensity and lifetime of fluorescence are related to the pO2 and pH. So the pO2 and pH can be measured by the relationship between the pO2/pH values and the intensity and lifetime of fluorescence. The signal conditioning system based on DSP and STM32 was used to store and process data, and display test values. The response of the sensor for pO2 and pH monitoring with nitrogen (N2) as a balancing gas in the laboratory was performed. Finally, the oxygen/pH sensing scheme presented in this work is intended for using in biological, medical and environmental applications.

关键词： optical fiber sensor Oxygen pH Fluorescence

Measurement of Solid-gas Two-phase Flow using optical fiber sensor

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Chinese Journal of Lasers 1997年第3期 56-61页

作者： FAN Hua CHEN Yuandi TAN Yushan( Institute of Laser & Infrared Applications inXian Jiaotong University, Xian 710049, China)

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关键词： optical fiber sensor solidgas twophase flow velocity and particle concentration measurement

Compensation of the optical fiber sensor based on the Surface Quality Detection for Steel Balls

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Compensation of the Optical Fiber Sensor based on the Surfac...

NOVEL SPECTRUM ABSORPTION optical fiber METHANE sensor

2011 Chinese Control and Decision Conference（CCDC）

作者： Ma Yu-zhen is with School of Mechanical Engineering,University of Jinan,Jinan 250022,China.Li Guo-ping is with School of Mechanical Engineering,University of Jinan,Jinan 250022,China.Liu Hua-guan is with School of Mechanical Engineering,University of Jinan.Zhang Yong-kui is with School of Mechanical Engineering,University of Jinan

This paper introduces the domestic and international steel ball surface defect detection status,a fiber optic sensor with multi-ring receiving fibers was used for the detection of surface defects on steel *** to the different mechanism of defects,the different mathematical models were adopted to compensate the displacement-related defects and roughness-related defects on steel ball,so as to achieve the purposes of accurate judgments and distinguish defects.

关键词： Steel ball optical fiber sensor Displacement Surface defects Roughness

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Chinese Journal of Mechanical Engineering 2005年第2期18卷 312-313页

作者： WangShutao CheRensheng SchoolofElectricalEngineenngandAutomation HarbinInstituteofTechnologyHarbin150001.China

Based on spectrum principle and analyzing the infrared absorption spectrum ofmethane, a kind of optical fiber methane gas sensor and its system are developed. DFBLD(Distributedfeedback laser diode) in 1 300 nm waveband is used as illuminant and phase-detecting technology isused to carry out harmonic wave detecting the concentration of methane. The sensitivity can arriveat 10^(-5). Experiments results show that the performance targets of the sensor such as sensitivitycan basically satisfy the requests of methane detection.

关键词： Methane Gas detecting optical fiber sensor Harmonic wave detecting

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Distributed optical fiber acoustic sensor for in situ monitoring of marine natural gas hydrates production for the first time in the Shenhu Area,China

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China Geology 2022年第2期5卷 322-329页

作者： Xiang-ge He Xue-min Wu Lei Wang Qian-yong Liang Li-juan Gu Fei Liu Hai-long Lu Yi Zhang Min Zhang Beijing International Center for Gas Hydrate Peking UniversityBeijing 100871China Guangzhou Marine Geological Survey China Geological SurveyMinistry of Natural ResourcesGuangzhou 510075China School of Earth and Space Sciences Peking UniversityBeijing 100871China Dongguan Institute of Optics and Electronics Peking UniversityDongguan 523000China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China SinoProbe Center Chinese Academy of Geological Sciences and China Geological SurveyMinistry of Natural ResourcesBeijing 100037China

The distributed acoustic sensor(DAS)uses a single optical cable as the sensing unit,which can capture the acoustic and vibration signals along the optical cable in *** it is suitable for monitoring downhole production activities in the process of oil and gas *** authors applied the DAS system in a gas production well in the South China Sea for in situ monitoring of the whole wellbore for the first time and obtained the distributed acoustic signals along the whole *** signals can clearly distinguish the vertical section,curve section,and horizontal production *** collected acoustic signal with the frequency of approximately 50 Hz caused by the electric submersible pump exhibit a signal-to-noise ratio higher than 27 *** analyzing the acoustic signals in the production section,it can be located the layers with high gas production *** an accurate physical model is built in the future,the gas production profile will be *** addition,the DAS system can track the trajectory of downhole tools in the wellbore to guide the *** the velocity analysis of the typical signals,the type of fluids in the wellbore can be *** successful application of the system provides a promising whole wellbore acoustic monitoring tool for the production of marine gas hydrate,with a good application prospect.

关键词： Gas hydrate production monitoring optical fiber sensor Distributed acoustic sensor In situ monitoring Fluid type NGHs exploration trial engineering Oil and gas exploration engineering Shenhu Area South China Sea

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