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2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)最新文献

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A long period grating liquid level sensor 一种长周期光栅液位传感器
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000518
S. James, S. Khaliq, R. Tatam
{"title":"A long period grating liquid level sensor","authors":"S. James, S. Khaliq, R. Tatam","doi":"10.1109/OFS.2002.1000518","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000518","url":null,"abstract":"Liquid level sensing is a requirement in many applications in which knowledge of the volume of a liquid is necessary, for example, in fuel storage systems and chemical processing. A wide range of liquid level sensing techniques have been reported based around mechanical, electrical, and optical methods. Electrical liquid level sensors are widely employed, but their applicability is compromised if the liquid to be monitored is conductive or if the environment is potentially explosive. Optical fibre sensors offer well-established advantages under these conditions. The optical fibre is a dielectric, and thus is non-conducting, and the sensor may be configured such the light is confined within the fibre, reducing the likelihood of ignition of a flammable environment. In this paper a liquid level sensor is demonstrated by exploiting the refractive index sensitivity of long period gratings (LPGs) to measure the length of the fibre immersed in a liquid.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128281725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
The effects of thermal and polarization fluctuations on 3/spl times/3 coupler performance 热和极化波动对3/ sp1倍/3耦合器性能的影响
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000831
T. Wiener, F. Bucholtz, Michael D. Todd
{"title":"The effects of thermal and polarization fluctuations on 3/spl times/3 coupler performance","authors":"T. Wiener, F. Bucholtz, Michael D. Todd","doi":"10.1109/OFS.2002.1000831","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000831","url":null,"abstract":"For the Gould 3/spl times/3 coupler studied here, changes in input SOP produce measurable changes in the power transfer properties of the coupler while temperature-induced changes are almost negligible over the range 0-100/spl deg/C. When used for passive demodulation in interferometric systems, changes in SOP will cause noise and inaccuracies in the calculated phase, even in systems employing Faraday rotator mirrors to prevent fringe visibility fading. Hence, the effects of polarization must be controlled by, for example, using a depolarized source or by realtime monitoring of the coupler phase angles. Future studies will extend the investigation to a variety of coupler types and to an investigation of the dependence of the complex scattering matrix on wavelength.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134154379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Modelling strain dependence of fluorescence from doped optical fibres: application to neodymium 模拟来自掺杂光纤的荧光应变依赖性:在钕中的应用
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000686
S. Collins, P. Farrell, S. Wade, G. Baxter, D. Simpson, A. Stevenson, K. Grattan, D. Forsyth
{"title":"Modelling strain dependence of fluorescence from doped optical fibres: application to neodymium","authors":"S. Collins, P. Farrell, S. Wade, G. Baxter, D. Simpson, A. Stevenson, K. Grattan, D. Forsyth","doi":"10.1109/OFS.2002.1000686","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000686","url":null,"abstract":"At the present time there is much interest in sensors for the simultaneous measurement of temperature and strain. To engineer strain or temperature sensors, based on the fluorescence lifetime or fluorescence intensity ratio techniques, with desirable characteristics requires detailed understanding of the physical origin of the strain dependency of these fluorescence effects. It has been suggested that the cause is slight shifts in the energy levels, since some of the important levels in rare-earth-doped crystals shift when subjected to considerable pressure. However, recent theoretical work analysing the two techniques, and outlined in the next section, does not support this idea. Instead, in that work, it was proposed that this sensitivity is due to a volumetric distortion of the energy transfer rates between the dopant ions. In this model an applied strain results in a slight decrease in concentration. To explore this latter idea, strain and temperature dependencies of Nd/sup 3+/-doped optical fibres of various concentrations have been analysed using this model. Existing data have been supplemented by new measurements, giving the sensitivities for the two techniques at a number of dopant concentrations.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131063129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Electromagnetic field sensing using liquid crystal optical fibers 利用液晶光纤进行电磁场传感
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000648
Byoungho Lee, Y. Jeong, S. Baek, Hak‐Rin Kim, Y. Kim, Y. Lee, S. Lee
{"title":"Electromagnetic field sensing using liquid crystal optical fibers","authors":"Byoungho Lee, Y. Jeong, S. Baek, Hak‐Rin Kim, Y. Kim, Y. Lee, S. Lee","doi":"10.1109/OFS.2002.1000648","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000648","url":null,"abstract":"Liquid crystal optical fibers are tested for the use of electric voltage sensing. The transmission or reflection characteristics of the sensor heads depend on the environmental electromagnetic fields due to the directional change of the liquid crystal molecules. Not only the conventional nematic but also polymer-dispersed liquid crystals are tested.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115160105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Fibre optic LED-based correlation spectroscopy for O/sub 2/ detection 基于光纤led的相关光谱O/sub 2/检测
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1012110
J. Dakin, M. Gunning, P. Chambers, E. Austin
{"title":"Fibre optic LED-based correlation spectroscopy for O/sub 2/ detection","authors":"J. Dakin, M. Gunning, P. Chambers, E. Austin","doi":"10.1109/OFS.2002.1012110","DOIUrl":"https://doi.org/10.1109/OFS.2002.1012110","url":null,"abstract":"This paper describes the first detection of O/sub 2/ by complementary-source-modulation (CoSM) correlation spectroscopy over optical fibre with compact LED sources. Theoretical results for the selective of O/sub 2/ by the CoSM method are also presented, based on spectral absorption data from the Hitran database.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116120810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fiber optic gyro technology trends - a Honeywell perspective 光纤陀螺技术的发展趋势-霍尼韦尔的观点
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000487
S. Sanders, L. Strandjord, D. Mead
{"title":"Fiber optic gyro technology trends - a Honeywell perspective","authors":"S. Sanders, L. Strandjord, D. Mead","doi":"10.1109/OFS.2002.1000487","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000487","url":null,"abstract":"This paper presents the evolution of FOG development and performance capabilities at Honeywell. A timeline of key milestones is given, and the technology developments and resulting performance improvements are outlined. Data from Honeywell's strategic-grade, high-precision FOGs (HPFOG) is included. Their applications include navigation and attitude reference, predominantly in the commercial aircraft industry.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125985785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 38
Optical current sensor application in the harsh environment of a 120 MVA power generator 光学电流传感器在120mva发电机恶劣环境下的应用
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000653
M. Willsch, T. Bosselmann
{"title":"Optical current sensor application in the harsh environment of a 120 MVA power generator","authors":"M. Willsch, T. Bosselmann","doi":"10.1109/OFS.2002.1000653","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000653","url":null,"abstract":"The demonstration of three optical current sensors inside a power generator under the influence of high temperature, vibrations and current up to 120 kA opens new ways of generator design.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128411620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Differential current relaying system with optical phase detection using flint glass fiber type optical current transformers 采用火石玻璃纤维型光电流互感器的光学相位检测差动电流继电系统
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000781
K. Kurosawa, Y. Tashiro, K. Ohkawara, K. Sasald, K. Terai, S. Miura, M. Hori
{"title":"Differential current relaying system with optical phase detection using flint glass fiber type optical current transformers","authors":"K. Kurosawa, Y. Tashiro, K. Ohkawara, K. Sasald, K. Terai, S. Miura, M. Hori","doi":"10.1109/OFS.2002.1000781","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000781","url":null,"abstract":"A differential current relaying system in which several optical current transformers using the flint glass fiber were connected in series was proposed. We found that the system experimentally satisfied accuracy as a relaying system.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114690787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Transverse load, static strain, temperature and vibration measurement using a cascaded FBG/EFPI/LPFG sensor system 横向载荷，静态应变，温度和振动测量使用级联FBG/EFPI/LPFG传感器系统
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000536
X. Zeng, Y. Rao, Yiping Wang, Z. Ran, T. Zhu
{"title":"Transverse load, static strain, temperature and vibration measurement using a cascaded FBG/EFPI/LPFG sensor system","authors":"X. Zeng, Y. Rao, Yiping Wang, Z. Ran, T. Zhu","doi":"10.1109/OFS.2002.1000536","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000536","url":null,"abstract":"We have demonstrated a novel technique for simultaneous measurement of static strain, temperature, vibration and transverse load for structural health monitoring using an integrated FBG/EFPI/LPFG sensor. Preliminary results show that this technique combines the advantages of the FBG, LPFG and low-coherence-interferometry, such as immune to EMI, high accuracy and resolution, small and compact sensor head, corrosion resistance etc. This sensor system is well-suited to health monitoring of large engineering structures, such as highways, bridges, buildings and aircrafts.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114877235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Formulas describing error induced by fiber linear-birefringence in fiber-optic current sensors 描述光纤电流传感器中光纤线性双折射引起的误差的公式
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000797
K. Hotate, Y. Konishi
{"title":"Formulas describing error induced by fiber linear-birefringence in fiber-optic current sensors","authors":"K. Hotate, Y. Konishi","doi":"10.1109/OFS.2002.1000797","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000797","url":null,"abstract":"In this paper, we derive formulas which generally describe the mechanism of the error induced by the birefringence of the sensing fiber coil, both for Polarimetric OFCS and Sagnac-loop OFCS. The formulas are applied to analyses of the error induced by the current outside the sensing fiber coil. The results are good accordance with numerical simulations.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116680042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
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