DocumentCode
1282043
Title
Passive, light intensity-independent interferometric method for fibre Bragg grating interrogation
Author
Todd, M.D. ; Johnson, G.A. ; Chang, C.C.
Author_Institution
Naval Res. Lab., Washington, DC, USA
Volume
35
Issue
22
fYear
1999
fDate
10/28/1999 12:00:00 AM
Firstpage
1970
Lastpage
1971
Abstract
The authors describe a passive technique for sensing the strain-induced wavelength shift of a fibre Bragg grating (FBG) using a Mach-Zehnder interferometer that utilises a 3×3 coupler. Laboratory data show that a resolution of ~10 nε/√(Hz) RMS is achievable with inherent insensitivity to source intensity variations
Keywords
Bragg gratings; Mach-Zehnder interferometers; fibre optic sensors; optical fibre testing; strain sensors; Mach-Zehnder interferometer; coupler; fibre Bragg grating; fibre optic strain sensor; light intensity dependence; passive measurement; strain-induced wavelength shift;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19991328
Filename
811098
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