Open AccessDistributed measurement of hydrostatic pressure based on Brillouin dynamic grating in polarization maintaining fibers
Author(s) -
Yong Hyun Kim,
Hong Kwon,
Jeongjun Kim,
Kwang Yong Song
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.021399
Subject(s) - optics , brillouin scattering , materials science , hydrostatic pressure , brillouin zone , grating , photonic crystal fiber , optical fiber , polarization (electrochemistry) , bar (unit) , pressure measurement , fiber bragg grating , optoelectronics , physics , chemistry , meteorology , thermodynamics
High-sensitivity distributed measurement of hydrostatic pressure is experimentally demonstrated by optical time-domain analysis of Brillouin dynamic grating (BDG) in polarization maintaining fibers (PMF's). The spectral shift of the BDG in four different types of PMF's are investigated under hydrostatic pressure variation from 14.5 psi (1 bar) to 884.7 psi (61 bar) with less than 2 m spatial resolution. The pressure sensitivity of BDG frequency is measured to be ‒1.69, + 0.65, + 0.78, and + 0.85 MHz/psi for a PM photonic crystal fiber (PM-PCF), two Bow-tie fibers, and a PANDA fiber, respectively, which is about 65 to 169 times larger than that of Brillouin frequency-based pressure sensing.