Title :
Spectral characteristics of tapered LPG device as a sensing element for refractive index and temperature
Author :
Allsop, T. ; Floreani, F. ; Jedrzejewski, K.P. ; Marques, P. V S ; Romero, R. ; Webb, D.J. ; Bennion, I.
Author_Institution :
Photonics Res. Group, Aston Univ., Birmingham, UK
Abstract :
The fabrication and characterization of long-period gratings (LPGs) in fiber tapers is presented alongside supporting theory. The devices possess a high sensitivity to the index of aqueous solutions due to an observed spectral bifurcation effect, yielding a limiting index resolution of ±8.5×10-5 for solutions with an index in the range 1.330-1.335.
Keywords :
bifurcation; diffraction gratings; fibre optic sensors; optical fibre fabrication; optical fibre testing; refractive index measurement; temperature measurement; temperature sensors; fiber tapers; long-period gratings; refractive-index measurement; spectral bifurcation effect; tapered LPG; temperature measurement; Chemical sensors; Fiber gratings; Optical coupling; Optical fiber devices; Optical fiber theory; Optical fibers; Optical refraction; Refractive index; Temperature measurement; Temperature sensors; Long-period fiber gratings; optical fiber devices; optical fiber tapers; refractive-index measurement; temperature measurement;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.862426
