Title :
Simultaneous measurement of temperature and strain distribution by optical time-domain analysis of Brillouin dynamic grating
Author :
Song, Kwang Yong ; Kim, Jae Hak ; Yoon, Hyuk Jin
Author_Institution :
Dept. of Phys., Chung-Ang Univ., Seoul, South Korea
Abstract :
Discriminative measurements of strain and temperature distribution are demonstrated based on optical time-domain analysis of Brillouin dynamic grating (BDG) in a polarization-maintaining fiber. The local information of the Brillouin frequency and the BDG frequency are acquired with a 1.2 m spatial resolution, and analyzed together to provide the distribution map of temperature and strain variation with the accuracies of ±1 K and ±20 μs, respectively.
Keywords :
Brillouin spectra; diffraction gratings; light polarisation; strain measurement; temperature distribution; temperature measurement; Brillouin dynamic grating; optical time-domain analysis; polarization-maintaining fiber; strain distribution; temperature measurement; Optical fiber sensors; Optical fibers; Optical variables measurement; Probes; Scattering; Strain;
Conference_Titel :
OptoElectronics and Communications Conference (OECC), 2010 15th
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-6785-3
