Title :
Simultaneous Measurement of Refractive Index and Temperature by Using Dual Long-Period Gratings With an Etching Process
Author :
Yan, Jinhua ; Zhang, A. Ping ; Shao, Li-Yang ; Ding, Jin-Fei ; He, Sailing
Author_Institution :
Zhejiang Univ. of Technol., Hangzhou
Abstract :
A new structure of long-period grating (LPG) sensor is introduced for simultaneous measurement of the refractive index (RI) and temperature. This type of grating device consists of two LPG sections, one of which is post etched by hydrofluoric acid (HF) solution and, therefore, has an improved RI sensitivity (the demonstrated improvement of sensitivity is 3.6 times). The experimental results show that this LPG sensor has a good performance in terms of linearity and sensitivity.
Keywords :
Bragg gratings; etching; fibre optic sensors; refractive index measurement; temperature measurement; dual long-period gratings; etching process; grating device; hydrofluoric acid solution; refractive index; temperature measurement; Biosensors; Bragg gratings; Chemical and biological sensors; Chemical sensors; Etching; Fiber gratings; Helium; Optical fiber sensors; Refractive index; Temperature sensors; Long-period grating (LPG); optical fiber sensor; refractive index (RI) measurement;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2007.905037
