Open AccessSingle-shot distributed Brillouin optical time domain analyzer
Author(s) -
Jian Fang,
Pengbai Xu,
Yongkang Dong,
William Shieh
Publication year - 2017
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.25.015188
Subject(s) - optics , spectrum analyzer , brillouin scattering , brillouin zone , distributed acoustic sensing , multiplexing , time domain , optical fiber , polarization (electrochemistry) , heterodyne detection , fiber optic sensor , physics , materials science , computer science , laser , telecommunications , chemistry , computer vision
We demonstrate a novel single-shot distributed Brillouin optical time domain analyzer (SS-BOTDA). In our method, dual-polarization probe with orthogonal frequency-division multiplexing (OFDM) modulation is used to acquire the distributed Brillouin gain spectra, and coherent detection is used to enhance the signal-to-noise ratio (SNR) drastically. Distributed temperature sensing is demonstrated over a 1.08 km standard single-mode fiber (SSMF) with 20.48 m spatial resolution and 0.59 °C temperature accuracy. Neither frequency scanning, nor polarization scrambling, nor averaging is required in our scheme. All the data are obtained through only one-shot measurement, indicating that the sensing speed is only limited by the length of fiber.