Title :
Distributed Sensing System of Optical Low-Coherence Reflectometry Using an Array of Identical Fiber Bragg Gratings
Author :
Liu, Weisheng ; Guan, Zu-Guang ; Liu, Guorong ; He, Sailing
Author_Institution :
Zhejiang Univ., Hangzhou
Abstract :
The optical low-coherent interferometric technology for Fiber Bragg grating (FBG) sensing array is described. The sensing array is formed by a series of identical FBGs with low reflectivity (5.25%), where the first FBG acts as a reference (shielded from the measurand), and the other FBGs work as sensors. Each sensing-FBG and the reference-FBG can form a Fabry-Perot (F-P) interferometer with a specific cavity length. By scanning a home-made optical low-coherence reflectometry (OLCR), the signals corresponding to different sensing-FBGs (F-P interferometers) can be obtained and well distinguished. A measurement of temperature is demonstrated and it shows good performance of the scheme.
Keywords :
Bragg gratings; Fabry-Perot interferometers; distributed sensors; reflectometry; sensor arrays; temperature measurement; Fabry-Perot interferometer; distributed sensing system; fiber Bragg grating; low reflectivity; optical low-coherence reflectometry; sensor array; temperature measurement; Bragg gratings; Fabry-Perot; Fiber gratings; Optical arrays; Optical interferometry; Optical sensors; Reflectivity; Reflectometry; Sensor arrays; Temperature measurement;
Conference_Titel :
Sensors, 2007 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1261-7
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2007.4388418
