Title :
Temperature independent strain measurement with a fiber grating tapered cavity sensor
Author :
Weichong Du ; Xiaoming Tao ; Hwa-Yaw Tam
Author_Institution :
Hong Kong Polytech., Kowloon, Hong Kong
fDate :
5/1/1999 12:00:00 AM
Abstract :
A novel fiber grating tapered cavity sensor used for encoding strain into its spectral profile independently and its experimental demonstration are presented. The sensor possesses two spectral peaks within its main reflection band and the normalized power difference between the two peaks changes linearly with applied strain while it is independent of temperature variation. The accuracy of this particular sensor in measuring strain is estimated to be /spl plusmn/29 μ/spl epsi/ in a range of 1200 μ/spl epsi/.
Keywords :
Bragg gratings; encoding; fibre optic sensors; measurement errors; strain measurement; applied strain; fiber grating tapered cavity sensor; main reflection band; normalized power difference; spectral peaks; spectral profile; strain encoding; strain measurement accuracy; temperature independent strain measurement; temperature variation; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber polarization; Optical fiber sensors; Optical reflection; Strain measurement; Temperature measurement; Temperature sensors; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
