Title :
Highly Sensitive Liquid-Level Sensor Based on Etched Fiber Bragg Grating
Author :
Binfeng Yun ; Na Chen ; Yiping Cui
Author_Institution :
Adv. Photonics Center, Southeast Univ., Nanjing, China
Abstract :
A highly sensitive liquid-level sensor based on etched fiber Bragg grating (FBG) is proposed and demonstrated. The transmission dips of FBG spectra are affected by the fraction of the length of the etched FBG that is surrounded by the liquid. The experiments show that for a liquid-level variation of 24 mm, the transmission dip difference changes about 32 dB. Also in the linear region, a high sensitivity of 2.56 dB/mm is achieved.
Keywords :
Bragg gratings; fibre optic sensors; level measurement; fiber Bragg grating; linear region; liquid-level sensor; transmission dip difference; Bragg gratings; Chemical processes; Chemical sensors; Couplings; Etching; Fiber gratings; Mechanical sensors; Optical fiber sensors; Refractive index; Temperature sensors; Etch; fiber Bragg grating (FBG); liquid-level sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.905093
