Title :
Athermal fibre cavity etalon for ultra-high-sensitivity strain sensing
Author :
Patrick, H.J. ; Wright, B.M. ; Friebele, E.J.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
fDate :
5/27/1999 12:00:00 AM
Abstract :
An ultra-high sensitivity static strain sensor with 300 nε/°C thermal apparent strain has been fabricated by constructing a fibre etalon cavity of concatenated fluoride and silica fibre sections bonded to a low thermal expansion coefficient graphite composite strut tube. The athermal cavity is 30 times less temperature-sensitive than a simple fluoride or silica cavity, while retaining the same response to physical strain.
Keywords :
fibre optic sensors; athermal cavity; athermal fibre cavity etalon; concatenated fluoride; low thermal expansion coefficient graphite composite strut tube; physical strain; silica cavity; silica fibre sections; temperature-sensitive; thermal apparent strain; ultra-high sensitivity static strain sensor; ultra-high-sensitivity strain sensing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990622
