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2008 1st Asia-Pacific Optical Fiber Sensors Conference最新文献

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Performance analysis of temperature and strain simultaneous measurement system based on heterodyne detection of Brillouin scattering 基于布里渊散射外差检测的温度应变同步测量系统性能分析
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1117/12.828617
Ji-sheng Zhang, Yong-qian Li, Shuo Zhang
{"title":"Performance analysis of temperature and strain simultaneous measurement system based on heterodyne detection of Brillouin scattering","authors":"Ji-sheng Zhang, Yong-qian Li, Shuo Zhang","doi":"10.1117/12.828617","DOIUrl":"https://doi.org/10.1117/12.828617","url":null,"abstract":"Microwave heterodyne detection can be used to measure the temperature and strain distribution along a fiber with high accuracy in a Brillouin optical time domain reflectometry (BOTDR) system. This method involves simultaneous measurement of Brillouin scattering and Rayleigh scattering in fiber, and scanning of Brillouin spectrum to obtain the desired information. This paper has presented a simultaneous measurement system of temperature and strain based on microwave detection and analyzed the system performances such as measurement accuracy, dynamic range, and spatial resolution theoretically. The analysis shows that the system can achieve a temperature resolution of 1°C and a strain resolution of 100 ¿¿.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129026791","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
The Amplification Effect on Rayleigh Scattering and SBS in 25Km distributed fiber Raman Amplifier 25Km分布式光纤拉曼放大器中瑞利散射和SBS的放大效应
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226284
H. Gong, Zai-xuan Zhang
{"title":"The Amplification Effect on Rayleigh Scattering and SBS in 25Km distributed fiber Raman Amplifier","authors":"H. Gong, Zai-xuan Zhang","doi":"10.1109/APOS.2008.5226284","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226284","url":null,"abstract":"The Amplification Effect on SBS and Rayleigh Scattering in the backward pumped G652 Fibers Raman Amplifier have been researched, pumped by the tunable power 1427.2nm fiber Raman laser and signal source is a tunable narrow spectral bandwidth (<;10MHz) ECL. The Rayleigh scattering lines are amplified by fiber Raman amplifier, and Stokes stimulated Brillouin scattering lines are amplified by fiber Raman amplifier and fiber Brillouin amplifier. The SBS lines total gain GA is production of the gain of Raman GR and the gain of Brillouin amplifier GB GA = GR · GB . In experiment, the gain of SBS is about 42dB and the saturation gain of 25km G652 backward FRA is about 25dB, so the gain of fiber Brillouin amplifier is about 17dB.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123930295","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
Optic fiber-based dynamic pressure sensor 光纤动态压力传感器
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226318
R. Qu, J. Geng, J. Gan, Z. Fang, Z. Pan, H. Cai
{"title":"Optic fiber-based dynamic pressure sensor","authors":"R. Qu, J. Geng, J. Gan, Z. Fang, Z. Pan, H. Cai","doi":"10.1109/APOS.2008.5226318","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226318","url":null,"abstract":"This paper shows the way to turn birefringence of single-mode fiber into a prime quality for a powerful and reliable sensor. This paper presents preliminary results for the development of a weigh-in-motion (WIM) technique based on sagnac-loop sensor. After a brief description of the sensor and its principle of operation, the theoretical model is developed.Then, a full characterization made in static conditions is presented.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126211965","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
Landslide monitoring based on high-resolution distributed fiber optic stress sensor 基于高分辨率分布式光纤应力传感器的滑坡监测
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226289
Zhi-yong Dai, Y. Liu, Lixun Zhang, Zhonghua Ou, Ce Zhou, Yong-zhi Liu
{"title":"Landslide monitoring based on high-resolution distributed fiber optic stress sensor","authors":"Zhi-yong Dai, Y. Liu, Lixun Zhang, Zhonghua Ou, Ce Zhou, Yong-zhi Liu","doi":"10.1109/APOS.2008.5226289","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226289","url":null,"abstract":"We present a landslide monitoring application using a high-resolution distributed fiber optic stress sensor. The sensor is used to monitor the intra-stress distribution and variations in landslide bodies, and can be used for the early warning of the occurrence of the landslides. The principle of distributed fiber optic stress sensing and the intra-stress monitoring method for landslides were described in detail in this paper. By measuring the distributed polarization mode coupling in the polarization-maintaining fiber, the distributed fiber stress sensor with stress measuring range 0-15 Mpa, spatial resolution 10 cm and measuring range 0.5 km, was designed. The warning system was also investigated experimentally in the field trial.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123970891","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: 13
A novel temperature-compensated, intensity-modulated fiber Bragg grating sensor system 一种新型的温度补偿、强度调制光纤光栅传感器系统
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226305
H. Tam, Xinyong Dong
{"title":"A novel temperature-compensated, intensity-modulated fiber Bragg grating sensor system","authors":"H. Tam, Xinyong Dong","doi":"10.1109/APOS.2008.5226305","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226305","url":null,"abstract":"An intensity-modulated, fiber Bragg grating (FBG) sensor system based on radio-frequency (RF) signal measurement is presented. The RF signal is generated at a photodetector by two modulated optical signals reflected from the sensing FBG and a reference one. Bragg wavelength shift of the sensing FBG changes intensity of the RF signal by changing phase difference between the two optical signals, with temperature effect being compensated automatically by the reference FBG. Strain measurement with a maximum sensitivity of -0.34 ¿V/¿¿ has been achieved.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115543440","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
Fiber methane gas sensor and its application in methane outburst prediction in coal mine 光纤甲烷气体传感器及其在煤矿瓦斯突出预测中的应用
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226294
J. Ni, Jun Chang, Tong-yu Liu, Yanfang Li, Yanjie Zhao, Qian Wang
{"title":"Fiber methane gas sensor and its application in methane outburst prediction in coal mine","authors":"J. Ni, Jun Chang, Tong-yu Liu, Yanfang Li, Yanjie Zhao, Qian Wang","doi":"10.1109/APOS.2008.5226294","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226294","url":null,"abstract":"Fiber optic methane gas detecting system based on distributed feedback (DFB) laser wavelength scanning technique is demonstrated. Wavelength scan of methane absorption peak at 1665.9 nm is realized by saw tooth modulation of current which is injected to DFB laser. A reference methane gas cell is used to find the methane absorption peak around 1666 nm, and normalization is used to reduce the outside affection such as power drift, fiber loss. Concentration is got by arithmetic processing absorption coefficient of the methane gas. In-situ test is carried out in coalmine and long time precision of 0.05% is achieved. Some spot data of coal mine is introduced. By the system, methane outburst can be measured.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126898434","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: 27
Ultra-high temperature (UHT) gratings 超高温(UHT)光栅
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226307
J. Canning, S. Bandyopadhyay, M. Stevenson, K. Cook
{"title":"Ultra-high temperature (UHT) gratings","authors":"J. Canning, S. Bandyopadhyay, M. Stevenson, K. Cook","doi":"10.1109/APOS.2008.5226307","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226307","url":null,"abstract":"Regenerated gratings seeded by type I gratings withstand temperatures beyond 1000°C. A new approach to increasing temperature resistance of ultra high T stable gratings is presented.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128928212","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
A nonlinear mirror structure to increase the performance of the distributed fiber temperature sensor based on Raman backscattering 基于拉曼后向散射的分布式光纤温度传感器采用非线性反射镜结构，提高了传感器的性能
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226301
Yang Chen, Lixun Zhang, Yong-zhi Liu, Xiaoli Zhou, Yong Liu, Zhi-yong Dai
{"title":"A nonlinear mirror structure to increase the performance of the distributed fiber temperature sensor based on Raman backscattering","authors":"Yang Chen, Lixun Zhang, Yong-zhi Liu, Xiaoli Zhou, Yong Liu, Zhi-yong Dai","doi":"10.1109/APOS.2008.5226301","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226301","url":null,"abstract":"We propose a novel nonlinear mirror structure that can increase the optical signal-to-noise ratio of a distributed fiber Raman temperature sensor. The nonlinear mirror is constructed by a four-port 3 dB coupler, which links two sensing optical fibers. The two sensing fibers make a bunch, and sense the same circumstance. When the quasi-continuous wave optical light is injected, the 3 dB coupler forms a backscattering nonlinear mirror, and reflects the whole scattering signals from the two sensing fibers into the receiver. Due to the constructive inference of the nonlinear mirror, the signal received by the detector is as four times higher as the case that uses a single sensing optical fiber. Thus, 6 dB improvement of the optical signal-to-noise ratio is obtained. The theoretical analysis and the experimental data are presented, which shows an agreement between each other. With the assistance of the nonlinear mirror, we demonstrate the spatial resolution of the sensor is improved from 3 meter to 1 meter, and the temperature accuracy is improved from plusmn0.6degC to plusmn0.2degC. The proposed nonlinear mirror structure can be extended to employ more sensing fibers, which can further improve the system performance.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130124487","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
Polymer single-nanowire for optical humidity sensing 用于光学湿度传感的聚合物单纳米线
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226286
Fubiao Gu, L. Tong
{"title":"Polymer single-nanowire for optical humidity sensing","authors":"Fubiao Gu, L. Tong","doi":"10.1109/APOS.2008.5226286","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226286","url":null,"abstract":"We report a general route to optical sensing with waveguiding polymer single nanowires. Functionalized polymer single nanowires, drawn from solvated polymers, are evanescently coupled to nanoscale fiber tapers for optical launching and signal collection. Based on pronounced changes in waveguiding behavior of the nanowire when exposed to specimens, polymer single-nanowire optical sensors for humidity detection is demonstrated with high sensitivity and fast response.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132127684","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: 2
Intra-cavity absorption sensors for gas detection using wavelength sweep technique 用波长扫描技术检测气体的腔内吸收传感器
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226292
Kun Liu, Wencai Jing, G. Peng, Jianzhong Zhang, Yan Wang, Tiegen Liu, Dagong Jia, Hongxia Zhang, Yimo Zhang
{"title":"Intra-cavity absorption sensors for gas detection using wavelength sweep technique","authors":"Kun Liu, Wencai Jing, G. Peng, Jianzhong Zhang, Yan Wang, Tiegen Liu, Dagong Jia, Hongxia Zhang, Yimo Zhang","doi":"10.1109/APOS.2008.5226292","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226292","url":null,"abstract":"Wavelength sweep technique (WST) is introduced into intra-cavity fiber laser (ICFL) for low concentration gas detection. The limitation induced by noise can be eliminated using this method, and the performance of the system is improved. The sensitivity of the system is reduced to less than 300 ppm. With WST, sweeping characteristic of the ICFL can be described according to known gas absorption spectra.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123264727","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
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