Open AccessPolarization push-pull effect-based gain fluctuation elimination in Golay-BOTDA
Author(s) -
Yin Zhou,
Lianshan Yan,
Zonglei Li,
Xinpu Zhang,
Wei Pan,
Bin Luo
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.029439
Subject(s) - polarization (electrochemistry) , optics , physics , stokes parameters , binary golay code , brillouin zone , brillouin scattering , polarization mode dispersion , optical fiber , scattering , computer science , chemistry , algorithm
A Brillouin gain fluctuation elimination scheme based on a hybrid polarization pulling and pushing effect (HPPP) is proposed and experimentally demonstrated in a Golay-coded Brillouin optical time domain analysis (BOTDA) fiber sensor. The analysis reveals that, due to the non-negligible probe state of polarization (SOP) deviation caused by the polarization pulling or pushing effect, the effectiveness of eliminating Brillouin gain fluctuation by using polarization switch is significantly degraded. Nevertheless, when probe Stokes and anti-Stokes components separately interact with orthogonal polarization pumps, the SOP evolution of the probe Stokes component due to the polarization pulling is totally identical to the SOP evolution of the probe anti-Stokes component caused by the polarization pushing. Based on this characteristic of the SOP evolutions, a novel HPPP method is proposed to eliminate the gain fluctuation. Experimental results demonstrate that the gain fluctuation falls to one-eighth of that of the conventional gain-only scheme by using this proposed HPPP method.