Reflectometric frequency-modulation continuous-wave distributed fiber-optic stress sensor with forward coupled beams

被引：24

作者：

Zheng, G

Campbell, M

Wallace, P

机构：

[1] Department of Physical Sciences, Glasgow Caledonian University, Glasgow, G4 OBA, Cowcadden Road

来源：

APPLIED OPTICS | 1996年 / 35卷 / 28期

关键词：

optical-fiber sensor; distributed sensor; frequency modulation continuous wave; stress measurement;

D O I：

10.1364/AO.35.005722

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A distributed optical-fiber stress sensor whose principle of operation is based on the frequency-modulation continuous-wave technique is reported. The sensor consists of a length of birefringent fiber with a mirror attached to one end, a diode laser, and a p-i-n photodiode detector. The intensity and the location of an applied stress are determined simultaneously by detecting the amplitude and the frequency of the beat signal, which is produced by two forward-coupled mode beams. The system was found to have a reasonable spatial resolution of 0.85 m (rms error) in a sensing range of 100 m. The advantages and limitations of the sensor are also discussed. (C) 1996 Optical Society of America

引用

页码：5722 / 5726

页数：5

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