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

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FBG hydrophone: Theory and experiment 光纤光栅水听器:理论与实验
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226324
Wentao Zhang, Fang Li, Yuliang Liu, Hao Xiao
{"title":"FBG hydrophone: Theory and experiment","authors":"Wentao Zhang, Fang Li, Yuliang Liu, Hao Xiao","doi":"10.1109/APOS.2008.5226324","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226324","url":null,"abstract":"A fiber Bragg grating (FBG) hydrophone with enhanced sensitivity is demonstrated. A novel piston-like diaphragm with a hard core fixed at the center is used as the sensing element. Theoretical analysis shows that the Young's modulus of the diaphragm and the radius of the hard core have significant effect on the pressure sensitivity. Experiments are carried out to test this effect and the performance of the hydrophone. The static measurement result is in good agreement with the theoretical result and an acoustic sensitivity of 7 nm/MPa has been achieved.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"75 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":"127235993","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
Research on measurement of frequency shift characteristics based on LiNbO3 waveguide electro-optic intensity modulator 基于LiNbO3波导电光强度调制器的频移特性测量研究
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226311
Huijuan Zhou, Z. Meng, Qiong Yao, Y. Liao
{"title":"Research on measurement of frequency shift characteristics based on LiNbO3 waveguide electro-optic intensity modulator","authors":"Huijuan Zhou, Z. Meng, Qiong Yao, Y. Liao","doi":"10.1109/APOS.2008.5226311","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226311","url":null,"abstract":"High-speed and wide-band LiNbO3 waveguide electro-optic intensity modulator has drawn great attention in the field of optical fiber communication and sensor. This paper reports the research results on the measurement of frequency shift characteristics of Mach-Zehnder electro-optic intensity modulator. Two measurement methods of frequency shift characteristics for high and low frequency modulations lead to different results, which are studied in theory and experiment. The realization of a multi-wavelength optical source based on Mach-Zehnder electro-optic intensity modulator has been introduced. The technique to reach the maximum intensity for interesting shift frequency, particularly for heterodyne detection of Brillouin distributed optical fiber sensing, has been given.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"78 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":"133457670","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
A passive optical fiber current sensor based on YIG 一种基于YIG的无源光纤电流传感器
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226321
Jing Shao, Wen Liu, Cuiqing Liu, Duan Xu
{"title":"A passive optical fiber current sensor based on YIG","authors":"Jing Shao, Wen Liu, Cuiqing Liu, Duan Xu","doi":"10.1109/APOS.2008.5226321","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226321","url":null,"abstract":"This paper presents a research on passive optical fiber current sensor based on magneto-optical crystal. It proposes a new design of light path of the sensor head. Both methods of dual-channel optical detection of the polarization state of the output light and signal processing are proposed. Signal processing can obtain the linearly output of the current measured of the wire more conveniently. Theoretically analysis on the magneto-optical fiber current sensor is given, followed by experiments to compare. After that, further analysis is made according to the results, which leads to clarify the exiting problems and their placements. These works may provide possible application of passive optical fiber current sensor in the near future.","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":"117240789","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
Intra-cavity absorption gas sensors using wavelength modulation and wavelength sweep 腔内吸收气体传感器使用波长调制和波长扫描
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226291
Kun Liu, Wencai Jing, G. Peng, Jianzhong Zhang, Yan Wang, Tiegen Liu, Dagong Jia, Hongxia Zhang, Yimo Zhang
{"title":"Intra-cavity absorption gas sensors using wavelength modulation and wavelength sweep","authors":"Kun Liu, Wencai Jing, G. Peng, Jianzhong Zhang, Yan Wang, Tiegen Liu, Dagong Jia, Hongxia Zhang, Yimo Zhang","doi":"10.1109/APOS.2008.5226291","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226291","url":null,"abstract":"Wavelength modulation technique (WMT) and wavelength sweep technique (WST) are introduced into intra-cavity absorption gas sensors (ICAGS) for low concentration gas detection. The optimized parameters of the system maximizing the signal-to-noise ratio (SNR) are found. Calibration of acetylene concentration and gas recognition are both realized.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"16 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":"125200280","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
Fiber optic Fourier transform white-light interferometry 光纤傅立叶变换白光干涉测量
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226314
Cai-jie Tang, Yi Jiang
{"title":"Fiber optic Fourier transform white-light interferometry","authors":"Cai-jie Tang, Yi Jiang","doi":"10.1109/APOS.2008.5226314","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226314","url":null,"abstract":"Fiber optic Fourier transform white-light interferometry is presented to interrogate the absolute optical path difference of an Mach-Zehnder interferometer. The phase change of the interferometer caused by scanning wavelength can be calculated by a Fourier transform-based phase demodulation technique. A linear output is achieved.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"90 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":"121690985","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
Experiment study of fiber optic sensing in railway security monitoring 光纤传感在铁路安全监控中的实验研究
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226310
D. Fan, De-Sheng Jiang, Weilai Li
{"title":"Experiment study of fiber optic sensing in railway security monitoring","authors":"D. Fan, De-Sheng Jiang, Weilai Li","doi":"10.1109/APOS.2008.5226310","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226310","url":null,"abstract":"Aiming at some security problem in railway running and the application condition of existing technology, this paper studies some issues of using fiber optic sensing technology in railway security monitoring. Through field experiment measuring the strain of the rail and analyzing the experiment data, the method of diagnosing the health condition of rail and wheel is investigated and the application in train WIM and imbalanced load detection are probed.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"491 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":"133339298","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
Fabry-Perot temperature sensor for quasi-distributed measurement utilizing OTDR 基于OTDR的准分布式测量法布里-珀罗温度传感器
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226297
Ping Xu, F. Pang, Na Chen, Zhenyi Chen, Tingyun Wang
{"title":"Fabry-Perot temperature sensor for quasi-distributed measurement utilizing OTDR","authors":"Ping Xu, F. Pang, Na Chen, Zhenyi Chen, Tingyun Wang","doi":"10.1109/APOS.2008.5226297","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226297","url":null,"abstract":"This paper presents a quasi-distributed Fabry-Perot fiber optic temperature sensor array using Optical Time Domain Reflectometry (OTDR) technique. The F-P sensor was made by two face to face single-mode optical fibers and their surfaces have been polished. Due to the low reflectivity of the fiber surfaces, the sensor was described as low Fresnel FPI. The working principle was analyzed using two-beam optical interference approximation. To measure the temperature, a certain temperature sensitive material was filled in the cavity. The slight changes of the reflective intensity which induced by the refractive index of the material was caught by OTDR. The length of the cavity was obtained by monitor the interference spectrum which is used for the setting of the sensor static characteristics within the quasi-linear range. Based on our design, a three point sensor array were fabricated and characterized. The experimental results show that with the temperature increasing from -30°C to 80°C, the reflectivity increased in a good linear manner. The sensitivity was approximate 0.074 dB/ °C. For the low transmission loss, more sensors can be integrated.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"31 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":"133695037","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
External optical feedback induced noise in DFB fiber laser sensor system DFB光纤激光传感器系统中的外光反馈诱导噪声
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226299
Yue Wu, Fang Li, Tuanwei Xu, Yuliang Liu
{"title":"External optical feedback induced noise in DFB fiber laser sensor system","authors":"Yue Wu, Fang Li, Tuanwei Xu, Yuliang Liu","doi":"10.1109/APOS.2008.5226299","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226299","url":null,"abstract":"External optical feedback effects due to reflection, Rayleigh backscattering and coherent Rayleigh backscattering in DFB fiber laser sensor system has been investigated. If the feedback intensity exceeds critical amount, excess noise would be induced in the demodulator. The maximum tolerable intensity back-reflection coefficient Rc and backscattering coefficient Sc into a fiber distributed feedback (DFB) laser with lead fiber length from 1 m~37.5 km before the onset of instabilities were shown. Rc was found to decrease with increasing lead fiber length while Sc was relatively invariable with varying fiber length. The coherent Rayleigh backscattering (CRBS) would induce neglectable noise with a lead fiber exceeding 13.5 km. To eliminate these noises, one or two isolators should be incorporated in the system.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"32 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":"114349633","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
Birefringent Bragg gratings in highly-nonlinear photonic crystal fibre 高非线性光子晶体光纤中的双折射布拉格光栅
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226306
J. Canning, K. Cook, J. Holdsworth
{"title":"Birefringent Bragg gratings in highly-nonlinear photonic crystal fibre","authors":"J. Canning, K. Cook, J. Holdsworth","doi":"10.1109/APOS.2008.5226306","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226306","url":null,"abstract":"Efficient writing of Bragg gratings in 12-ring highly-nonlinear photonic crystal fibres is described. We perform experimental and numerical investigations to reveal the optimum angle for coupling UV writing light to the core, furthermore, we show that the formation of a strongly briefringent grating at a particular angle of orientation.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"71 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131922502","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
Highly birefringent air-core photonic band-gap fiber free of surface modes 无表面模的高双折射空芯光子带隙光纤
2008 1st Asia-Pacific Optical Fiber Sensors Conference Pub Date : 2008-08-01 DOI: 10.1109/APOS.2008.5226317
Xiujuan Yu, M. Zhang, Y. Liao
{"title":"Highly birefringent air-core photonic band-gap fiber free of surface modes","authors":"Xiujuan Yu, M. Zhang, Y. Liao","doi":"10.1109/APOS.2008.5226317","DOIUrl":"https://doi.org/10.1109/APOS.2008.5226317","url":null,"abstract":"A new type of highly birefringent(HB) air-core photonic band-gap fiber free of surface modes is theoretical investigated by using the full-vector finite element method(FEM). From the simulation result and thorough analysis on the guided mode field distribution, the proposed HB hollow-core photonic band-gap(PBG) fiber is free of surface modes in wider wavelength. The phase-index and group-index birefringence of the HB fiber are studied, which have the value in the order of 10-4 and 10-3, respectively.","PeriodicalId":154236,"journal":{"name":"2008 1st Asia-Pacific Optical Fiber Sensors Conference","volume":"13 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":"123947088","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
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