Open AccessBOTDA using channel estimation with direct-detection optical OFDM technique
Author(s) -
Can Zhao,
Ming Tang,
Liang Wang,
Hao Wu,
Zhiyong Zhao,
Yunli Dang,
Jiang Wu,
Songnian Fu,
Deming Liu,
Perry Ping Shum
Publication year - 2017
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.25.012698
Subject(s) - optics , orthogonal frequency division multiplexing , brillouin zone , brillouin scattering , optical power , channel (broadcasting) , signal (programming language) , time domain , sweep frequency response analysis , materials science , single mode optical fiber , physics , optical fiber , telecommunications , acoustics , computer science , laser , computer vision , programming language
A novel Brillouin optical time-domain analysis (BOTDA) system without frequency sweep operation is proposed using intensity-modulated direct detection optical orthogonal frequency division multiplexing (IM-DD-OOFDM) probe signal. The influence of peak to average power ratio (PAPR) of OFDM probe signal on the recovery of Brillouin gain spectrum (BGS) is analyzed in theory and experiment. The complex BGS is reconstructed by channel estimation algorithm and Brillouin frequency shift (BFS) is located by curve fitting of intensity spectrum. The IM-DD-OOFDM BOTDA is demonstrated experimentally with 25 m spatial resolution over 10 km standard single mode fibers within much less measurement time.