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

Doppler difference velocimetry using a 2-core photonic crystal fibre 使用二芯光子晶体光纤的多普勒差分测速

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1012108

W. Macpherson, J. Jones, B. Mangan, J. Knight, P. Russell

引用次数: 1

Multiplexing of self-referenced fibre optic intensity sensors using fibre Bragg gratings and wavelength division couplers 使用光纤布拉格光栅和波分耦合器的自参考光纤强度传感器的多路复用

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000547

J. Baptista, S. Abad, G. Rego, L. Ferreira, F. Araujo, J.L. Santos, A. Lage

{"title":"Multiplexing of self-referenced fibre optic intensity sensors using fibre Bragg gratings and wavelength division couplers","authors":"J. Baptista, S. Abad, G. Rego, L. Ferreira, F. Araujo, J.L. Santos, A. Lage","doi":"10.1109/OFS.2002.1000547","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000547","url":null,"abstract":"In this work a wavelength multiplexing concept was demonstrated for frequency based self-referenced fibre optic intensity sensors relying on the utilisation of Bragg gratings and WDM couplers. The experimental results obtained showed a fairly good agreement with those predicted from the theory. It turned out that the system had negligible crosstalk between the two sensors. The resolution obtained for the sensors was found to be /spl ap/0.05 dB/spl radic/Hz. It should be emphasised, that the sensing concept described in this work is particularly favourable in terms of the minimisation of system noise. This happens because what is monitored is the amplitude of two sinewaves, i.e., the detection bandwidth can be made as narrow as practically feasible, with the consequent decrease of the system noise level. The power budget of the sensing network can be improved if shorter lengths of delay fibre are used, with the penalty, however, of working with higher frequencies. On the other hand, if the reflectivity of the FBGs is optimised, the power received by the detectors will increase correspondingly. Finally, a proper choice of the coupling coefficient of the couplers in the reflective ladder topology will have a strong impact on the optical power levels reaching the detector unit.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"8 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":"116665810","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: 3

Transversal force sensor using polarization-maintaining fiber independent of direction of applied force: proposal and experiment 不受施加力方向影响的保偏光纤横向力传感器:方案与实验

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000586

K. Hotate, S.O.S. Leng

引用次数: 6

The present and future of fiber optic sensors for the oilfield service industry: where is there a role? 光纤传感器在油田服务行业的现状和未来:有什么作用?

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000497

R. Schroeder

引用次数: 8

FBG-based smart composite bogies for railway applications 基于fbg的铁路智能复合转向架

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000509

L. Maurin, J. Boussoir, S. Rougeault, M. Bugaud, P. Ferdinand, A. Landrot, Y-H. Grunevald, T. Chauvin

引用次数: 45

A 3 sensor multipoint optical fibre water sensor utilising artificial neural network pattern recognition 一种利用人工神经网络模式识别的3传感器多点光纤水传感器

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000692

W. Lyons, D. King, C. Flanagan, E. Lewis, H. Ewald, S. Lochmann

{"title":"A 3 sensor multipoint optical fibre water sensor utilising artificial neural network pattern recognition","authors":"W. Lyons, D. King, C. Flanagan, E. Lewis, H. Ewald, S. Lochmann","doi":"10.1109/OFS.2002.1000692","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000692","url":null,"abstract":"A multipoint sensor on a 1 km continuous length of fibre has been investigated and proven to be capable of detecting the presence of air, ethanol and water at each of three independent sensing points using OTDR techniques. Artificial neural network signal processing techniques have allowed the resulting OTDR signals to be accurately determined using pattern recognition. Each of the U-bend evanescent wave absorption sensors were developed with 62.5 /spl mu/m polymer-clad silica fibre, which had its cladding removed in the sensing region. Although the length of the fibre used in this investigation was 1 km, longer or shorter lengths may be used as required. Earlier results from a single U-bend sensor have shown that a multilayer perceptron is required to adequately classify the data. Initial results have shown that it is possible to train a network to recognise trends such as ageing of the bare fibre when immersed in water, and therefore possible to separate out such effects from genuine changes in the measurand. It is envisaged that a more sophisticated multipoint U-bend evanescent wave sensor system will be developed, with the resulting complex signals being processed using Artificial neural network pattern recognition techniques. This will result in the development of a 'smart system', with the ability to interpret and separate relevant measurand data from the data received from cross coupling signals from external or interfering parameters as well as faults or defects detected in the fibre.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"92 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":"122115070","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: 9

Chirped fiber optic Bragg grating interrogator for a Bragg grating strain sensor 用于布拉格光栅应变传感器的啁啾光纤光栅查询器

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000543

A. Chtcherbakov, P. Swart

引用次数: 1

2-laser injection-locking configuration for Brillouin fibre sensors 布里渊光纤传感器的双激光注入锁定配置

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000566

M. Facchini, L. Thévenaz, J. Troger, P. Robert

引用次数: 3

Frequency modulation properties of erbium doped DFB fiber lasers using cavity strain 掺铒DFB光纤激光器的腔应变调频特性

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000747

G. A. Cranch

引用次数: 3

How to start a small high tech business in Troutdale, Oregon? 如何在俄勒冈州的特劳特代尔创办一家小型高科技企业?

2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000493

E. Udd

引用次数: 2