Open AccessDistributed measurement of Brillouin dynamic grating spectrum localized by an intensity- modulated correlation-domain technique
Author(s) -
Youhei Okawa,
Rodrigo Kendy Yamashita,
Masato Kishi,
Kazuo Hotate
Publication year - 2020
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.396811
Subject(s) - optics , brillouin scattering , grating , brillouin zone , polarization (electrochemistry) , materials science , intensity modulation , image resolution , fiber bragg grating , optical fiber , phase modulation , physics , chemistry , phase noise
Higher spatial resolution of the reflection spectrum measurement of Brillouin dynamic grating (BDG) was achieved by controlling phonon power distribution. We experimentally demonstrate the improvement effect of the light-source intensity-modulation method, proposed recently in a correlation-domain technique, and successfully detected an 8-cm cooled section in a 100-m-long polarization-maintaining fiber. Our method can improve the spatial resolution of BDG measurements, leading to high resolution discriminative and distributed fiber sensing of temperature and strain.