FIBER-OPTIC DISTRIBUTED SENSOR BASED ON A SAGNAC INTERFEROMETER WITH A TIME DELAY LOOP FOR DETECTING TIME-VARYING DISTURBANCE

被引：10

作者：

Xu, Wenyuan ^{[1
]}

Zhang, Chunxi ^{[1
]}

Liang, Sheng ^{[1
]}

Li, Lijing ^{[1
]}

Lin, Wentai ^{[1
]}

Yang, Yusheng ^{[1
]}

机构：

[1] Beihang Univ, Sch Instrument Sci & Optoelect Engn, Beijing 100192, Peoples R China

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2009年 / 51卷 / 11期

关键词：

fiber optic distributed sensor; Sagnac interferometer; disturbances sensor; time delay loop; time-division multiplexing (TDM); IMPACT SENSOR; LOCATION; LOCALIZATION; ZEHNDER; SYSTEM;

D O I：

10.1002/mop.24672

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A fiber optic distributed sensor, based on a Sagnac interferometer for determining the location of time-varying disturbance, is presented in this paper. The proposed distributed sensor constitutes a Sagnac interferometer with an additional time delay fiber loop. Due to the time-division multiplexing technique, by employing the light pulse, there are actually two Sagnac interferometers utilized for distributed sensing, and the amplitudes of the time-division multiplexed signals are distinguished and converted to location information. Experimental results obtained with a 10 kin long sensing fiber are discussed. The proposed distributed sensor has the advantages of capability of real time sensing, low cost and simple configuration. (C) 2009 Wiley Periodicals. Inc. Microwave Opt Technol Lett 51: 2564-2567, 2009 Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24672

引用

页码：2564 / 2567

页数：4

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