Open AccessInfluence of optical simple pulse coding on the Brillouin optical time domain analyzer based on bi-directional Raman amplification
Author(s) -
Chao Zhang,
Yunjiang Rao,
Xin-Hong Jia,
Kuan Deng,
Liang Chang,
Zengling Ran
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.104211
Subject(s) - spectrum analyzer , optics , brillouin zone , raman amplification , materials science , brillouin scattering , time domain , distributed acoustic sensing , optical time domain reflectometer , signal (programming language) , raman spectroscopy , optical fiber , optical power , image resolution , fiber optic sensor , raman scattering , polarization maintaining optical fiber , physics , laser , computer science , computer vision , programming language
We report the influence of optical simple pulse coding on the Brillouin optical time domain analyzer (BOTDA) based on bi-directional Raman amplification. This method is proposed to reduce the frequency uncertainty in long-distance BOTDA under higher spatial resolution. The experimental characterization of 49.6 km temperature sensing with a measurement accuracy of ~1 ℃ under ~2.5 m spatial resolution over the whole length of sensing fiber is demonstrated. The signal-to-noise ratio (SNR) and the optical signal power distribution characteristics of the system are studied experimentally in this paper.