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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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Macrobend loss reduction of a fiber interferometer using graded-index multimode fiber 用梯度折射率多模光纤降低光纤干涉仪的大弯曲损耗
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000760
B. Ludington, R. Weis
{"title":"Macrobend loss reduction of a fiber interferometer using graded-index multimode fiber","authors":"B. Ludington, R. Weis","doi":"10.1109/OFS.2002.1000760","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000760","url":null,"abstract":"An optical fiber interferometer can be used to measure the pressure change between adjacent locations along a capillary tube without disturbing the fluid flow within the tube. The current work demonstrates that a novel configuration of a concatenated SM-MM-SM fiber structure, named SMS, can be used to minimize the macrobend loss of an interferometer that senses pressure changes in small capillary tubes.","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":"123850513","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: 0
A high sensitivity long period grating Mach-Zehnder refractometer 高灵敏度长周期光栅马赫-曾德尔折光计
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000517
T. Allsop, D. Webb, I. Bennion
{"title":"A high sensitivity long period grating Mach-Zehnder refractometer","authors":"T. Allsop, D. Webb, I. Bennion","doi":"10.1109/OFS.2002.1000517","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000517","url":null,"abstract":"A refractive index sensing system has been demonstrated, which is based upon an in-line fibre long period grating Mach-Zehnder interferometer with a heterodyne interrogation technique. This sensing system has comparable accuracy to laboratory-based techniques used in industry such as high performance liquid chromatography and UV spectroscopy. The advantage of this system is that measurements can be made in-situ for applications in continuous process control. Compared to other refractive index sensing schemes using LPGs, this approach has two main advantages. Firstly, the system relies on a simple optical interrogation system and therefore has the real potential for being low cost, and secondly, so far as we are aware it provides the highest refractive index resolution reported for any fibre LPG device.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"100 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":"127675924","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
High pressure sensing using fiber Bragg gratings written in birefringent side hole fiber 用双折射侧孔光纤写入的光纤布拉格光栅进行高压传感
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000576
S. Kreger, S. Calvert, E. Udd
{"title":"High pressure sensing using fiber Bragg gratings written in birefringent side hole fiber","authors":"S. Kreger, S. Calvert, E. Udd","doi":"10.1109/OFS.2002.1000576","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000576","url":null,"abstract":"Pressure measurements are made by measuring Bragg grating peak splitting caused by transverse strain differences in the core of a single mode side hole fiber. The side holes and not the fiber exterior are pressurized, demonstrating the ability to use the side holes as a pressure conduit so that pressure measurements can be made in a thermally and mechanically stable environment. Geometrical and residual stress-based birefringence stemming from partial side hole collapse during the drawing process allows measurements to be made near atmospheric pressures. Peak fitting techniques are used to determine peak separation to sub-pm levels despite substantial peak overlap.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"41 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":"130466834","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: 25
Frequency noise reduction in erbium doped fibre Bragg grating lasers using active electronic feedback 利用有源电子反馈降低掺铒光纤光栅激光器的频率噪声
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000560
G. A. Cranch
{"title":"Frequency noise reduction in erbium doped fibre Bragg grating lasers using active electronic feedback","authors":"G. A. Cranch","doi":"10.1109/OFS.2002.1000560","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000560","url":null,"abstract":"We present an erbium doped fibre laser (EDFL) in a MOPA (master oscillator power amplifier) configuration with intensity and frequency noise reduction using electronic feedback techniques. The intensity noise is suppressed using feedback to the pump diode current and the frequency noise is suppressed by locking the laser emission to a fibre interferometer and applying a feedback signal through laser cavity strain using a piezo-electric element.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"18 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":"134174951","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
Departure from linearity of fibre Bragg grating temperature coefficients 光纤光栅温度系数偏离线性
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000505
G. Flockhart, W. Macpherson, J. Barton, J. Jones, L. Zhang, I. Bennion
{"title":"Departure from linearity of fibre Bragg grating temperature coefficients","authors":"G. Flockhart, W. Macpherson, J. Barton, J. Jones, L. Zhang, I. Bennion","doi":"10.1109/OFS.2002.1000505","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000505","url":null,"abstract":"We have measured the Bragg wavelength shift of three gratings from -30/spl deg/C to +80/spl deg/C. The observed deviation from linearity is a quadratic function of temperature, arising from the non-linear thermo-optic coefficient of silica glass.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"16 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":"133197061","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: 21
Background-noise reduction in the infrared fiber optic thermometry 红外光纤测温中的背景噪声抑制
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000738
M. Saito, T. Nishikawa, M. Shishido
{"title":"Background-noise reduction in the infrared fiber optic thermometry","authors":"M. Saito, T. Nishikawa, M. Shishido","doi":"10.1109/OFS.2002.1000738","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000738","url":null,"abstract":"Infrared optical fibers have been desired in the remote sensing fields to extend the measurement spectral range. Thermometry is one of those fields in which the use of infrared fibers has been studied most keenly. Although many papers on the fiber optic thermometers have been published, only a few sensors are actually used in industrial or medical measurements. One reason for their low popularity is the measurement error that is caused, for example, by fiber bending or by surrounding temperature change. In particular, thermal emission by the fiber affects the measurement accuracy, since the fiber probe is usually inserted into a warm or hot environment. The change in fiber temperature causes a change in the background thermal emission, leading to sensor signal drift. The drift can be reduced in high-temperature measurements (>200/spl deg/C), since the short-wavelength radiation of the high-temperature object can be separated from the long-wavelength radiation of the low-temperature fiber. However, the surrounding temperature yields a serious effect on the low-temperature measurement (<200/spl deg/C) in which radiation around 10 /spl mu/m wavelength has to be measured. In this work, we used a small, rugged, and heat-resistant infrared modulator to conduct drift-free fiber optic thermometry.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"47 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":"126582307","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
Voltage presence indicator using ZnS:Mn AC thin film electroluminescent device 使用 ZnS:Mn 交流薄膜电致发光器件的电压存在指示器
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000663
A. Arnaud, V. Minier
{"title":"Voltage presence indicator using ZnS:Mn AC thin film electroluminescent device","authors":"A. Arnaud, V. Minier","doi":"10.1109/OFS.2002.1000663","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000663","url":null,"abstract":"We describe a new type of voltage presence sensor using thin film electroluminescent devices. The optical device is capacitively coupled between a conductor of an AC power distribution system and the ground.","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":"127054529","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
A microphone array using fiber Bragg gratings 使用光纤布拉格光栅的麦克风阵列
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000546
T. Iida, K. Nakamura, S. Ueha
{"title":"A microphone array using fiber Bragg gratings","authors":"T. Iida, K. Nakamura, S. Ueha","doi":"10.1109/OFS.2002.1000546","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000546","url":null,"abstract":"We proposed an optical microphone array using fiber Bragg gratings (FBGs). Deformation of the diaphragm was transformed to the modulation in the center wavelength of the FBG. We demonstrated, the WDM operation of a four-element array microphone as well as the performances of the element microphone such as frequency response, linearity and sensitivity. To realize a simultaneous measurement for a large number of elements, the development of a special WDM detection system is required.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"136 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":"125816165","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: 17
A novel fiber-optic torsion sensor based on a CO/sub 2/-laser-induced long-period fiber grating 一种基于CO/sub / 2 -激光诱导长周期光纤光栅的新型光纤扭转传感器
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000523
Y.P. Wang, Y. Rao, A. Hu, X.K. Zeng, Z. Ran, T. Zhu
{"title":"A novel fiber-optic torsion sensor based on a CO/sub 2/-laser-induced long-period fiber grating","authors":"Y.P. Wang, Y. Rao, A. Hu, X.K. Zeng, Z. Ran, T. Zhu","doi":"10.1109/OFS.2002.1000523","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000523","url":null,"abstract":"In this letter, we propose and demonstrate a fiber-optic torsion sensor based on a novel long period fiber grating (LPFG) written by high-frequency CO/sub 2/ laser pulses. Such a sensor can be easily embedded into a structure and can determine both the twist rate and the twist direction simultaneously.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"36 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":"124834298","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
Vehicle weigh-in-motion using multiplexed interferometric sensors 使用多路干涉传感器的车辆运动称重
2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533) Pub Date : 2002-05-10 DOI: 10.1109/OFS.2002.1000625
D. Hill, P. J. Nash, N. Sanders
{"title":"Vehicle weigh-in-motion using multiplexed interferometric sensors","authors":"D. Hill, P. J. Nash, N. Sanders","doi":"10.1109/OFS.2002.1000625","DOIUrl":"https://doi.org/10.1109/OFS.2002.1000625","url":null,"abstract":"The work reported here has indicated that interferometric fibre optic sensors are ideally suited when large numbers of in road sensors are required. We have demonstrated for the first time the in-road deployment of a multiplexed weigh-in-motion sensor array. Multiplexing studies using similar architectures have shown that by using a combination of spatial, time and wavelength division multiplexing it is possible to interrogate several hundred sensors on a single fibre. We also demonstrated that the feasibility of using the standard telecom fibre, within existing national highways communication system cables, to interrogate sensors over large distances, is viable.","PeriodicalId":147710,"journal":{"name":"2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)","volume":"44 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":"127214119","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: 12
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