Title :
Fiber Cavity Ring-Down Refractive Index Sensor
Author :
Ni, N. ; Chan, C.C. ; Xia, L. ; Shum, P.
Author_Institution :
Sch. of Chem. & Biomed. Eng., Nanyang Technol. Univ., Singapore
Abstract :
An exploratory study on a novel fiber long-period grating (LPG) cavity ring-down refractive index sensor is conducted. By detecting the ring-down curves at different ambient refractive index levels, the performances of the LPG sensor are investigated. The experimental results demonstrate by using this sensing setup the change of the refractive index in 1.35-1.43 region could be effectively detected.
Keywords :
diffraction gratings; erbium; fibre optic sensors; laser cavity resonators; measurement by laser beam; optical fibre amplifiers; optical fibre couplers; refractive index measurement; EDFA; JkJk:Er; cavity ring-down sensor; erbium doped fiber amplifier; fiber long-period grating sensor; optical fiber couplers; refractive index measurement; refractive index sensor; ring-down curves; Biomedical measurements; Chemical technology; Fiber gratings; Optical attenuators; Optical fiber couplers; Optical fiber losses; Optical fiber sensors; Propagation losses; Refractive index; Resonance; Cavity ring-down (CRD); long-period grating (LPG); refractive index sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.926866
