DocumentCode
1417190
Title
A variable-loop Sagnac interferometer for distributed impact sensing
Author
Fang, Xiaojun
Author_Institution
Telecommun. & Inf. Sci. Lab., Kansas Univ., Lawrence, KS, USA
Volume
14
Issue
10
fYear
1996
fDate
10/1/1996 12:00:00 AM
Firstpage
2250
Lastpage
2254
Abstract
A variable-loop fiber optic Sagnac interferometer is designed to locate a time-varying disturbance. Phase perturbation on a Sagnac loop produces a nonreciprocal phase signal which contains information of the perturbation location. Both location and amplitude of the perturbation can be determined by combining two phase signals from the variable-loop Sagnac interferometer. Spatial resolution better than 1 m has been demonstrated in a 180 m prototype system
Keywords
fibre optic sensors; impact (mechanical); light interferometers; mechanical variables measurement; optical signal detection; 180 m; distributed impact sensing; fiber optic Sagnac interferometer; nonreciprocal phase signal; perturbation location; phase perturbation; spatial resolution; time-varying disturbance; variable-loop Sagnac interferometer; High speed optical techniques; Light scattering; Optical interferometry; Optical pumping; Optical receivers; Optical scattering; Optical sensors; Optical signal processing; Phase modulation; Sagnac interferometers;
fLanguage
English
Journal_Title
Lightwave Technology, Journal of
Publisher
ieee
ISSN
0733-8724
Type
jour
DOI
10.1109/50.541215
Filename
541215
Link To Document