Title :
Long-period fibre grating bend sensor based on measurement of resonance mode splitting
Author :
Liu, Y. ; Zhang, L. ; Williams, J.A.R. ; Bennion, I.
Author_Institution :
Dept. of Electron. Eng. & Appl. Sci., Aston Univ., Birmingham, UK
Abstract :
Summary form only given. Photoinduced long-period fiber gratings (LPGs) have been demonstrated as bend sensors measuring curvature by detecting the bending-induced wavelength shift. We report the realisation of an optical bend sensor based on the measurement of bending-induced resonance mode splitting of the LPG. This is a new approach to fibre optic bend sensing which exhibits a significantly higher sensitivity than the wavelength-shift detection method. We have also investigated the effect of the initial mode coupling strength on the spectral response of the sensor under bending yielding practical design information.
Keywords :
bending; curvature measurement; diffraction gratings; fibre optic sensors; optical fibre losses; optical fibre testing; sensitivity; bend sensors; bending; bending-induced resonance mode splitting; bending-induced wavelength shift; curvature; fibre optic bend sensing; initial mode coupling strength; long-period fibre grating bend sensor; optical bend sensor; photoinduced long-period fiber gratings; practical design information; resonance mode splitting; sensitivity; spectral response; wavelength-shift detection method; Capacitive sensors; Fiber gratings; Linearity; Optical fiber sensors; Optical sensors; Resonance;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.907046
