Title :
Simple Fresnel Reflection-Based Optical Fiber Sensor for Multipoint Refractive Index Measurement Using an AWG
Author :
Chun-Liu Zhao ; Jihui Li ; Shuqin Zhang ; Zaixuan Zhang ; Shangzhong Jin
Author_Institution :
Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China
Abstract :
A simple Fresnel reflection-based optical fiber refractometer for simultaneous multipoint measurement based on an arrayed-waveguide grating (AWG) is proposed. The AWG is used as a demultiplexing unit and different channel fibers of the AWG work as different sensor heads. Every channel light divided by the AWG is marked with a different central wavelength, and its reflection from its fiber-solution interface is used to measure the RI of the inserted solution. By using the AWG unit, a simple and compact structure sensor for multipoint sensing is achieved. Experiment results show that the sensor works well and the average sensitivity is ~ 01.9 dB/RIU for refractive indices, in the range of 1.33-1.42.
Keywords :
arrayed waveguide gratings; fibre optic sensors; refractive index measurement; refractometers; AWG; Fresnel reflection-based optical fiber refractometer; Fresnel reflection-based optical fiber sensor; arrayed-waveguide grating; channel fibers; multipoint measurement; multipoint refractive index measurement; multipoint sensing; Arrayed waveguide gratings; Optical fiber sensors; Optical fibers; Optical variables measurement; Reflection; Arrayed-waveguide grating (AWG); fresnel reflection; multipoint measurement; optic-fiber sensor; refractive index sensing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2243833
