DocumentCode :
1026030
Title :
Strain and temperature characterisation of sensing head based on suspended-core fibre in Sagnac interferometer
Author :
Frazao, Orlando ; Baptista, Jose Manuel ; Santos, Jose Luis ; Kobelke, Jens ; Schuster, Kay
Author_Institution :
INESC Porto, Porto
Volume :
44
Issue :
25
fYear :
2008
Firstpage :
1455
Lastpage :
1456
Abstract :
The study of the strain and temperature characteristics of a sensing head based on a four-hole suspended-core fibre in a Sagnac interferometric configuration is reported. It is shown that, for the case of using an uncoated suspended-core fibre, a relatively large strain sensitivity is obtained (sime1.94 pm/muepsiv), while the temperature sensitivity is small (sime0.29 pm/degC), pointing to a temperature-independent strain sensor. When the fibre is coated, the strain sensitivity remains essentially the same, while the temperature sensitivity becomes much larger and with a value that changes with the localisation of the temperature variation range.
Keywords :
Sagnac interferometers; fibre optic sensors; optical fibre cladding; optical fibre testing; strain sensors; temperature sensors; Sagnac interferometer; strain sensitivity; strain sensor; suspended-core fibre; temperature sensitivity;
fLanguage :
English
Journal_Title :
Electronics Letters
Publisher :
iet
ISSN :
0013-5194
Type :
jour
DOI :
10.1049/el:20081431
Filename :
4703471
Link To Document :
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