Open AccessBrillouin optical time domain collider for fast dynamic sensing
Author(s) -
Yin Zhou,
Lianshan Yan,
Haijie He,
Zonglei Li,
Peng Jiang,
Xinpu Zhang,
Wei Pan,
Bin Luo
Publication year - 2020
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.385248
Subject(s) - optics , brillouin scattering , brillouin zone , time domain , optical fiber , physics , frequency domain , computer science , computer vision
The dynamic sampling rate of Brillouin optical time domain analysis (BOTDA) is limited by fiber length. For breaking through this limit, a Brillouin optical time domain collider (BOTDC) is proposed and experimentally demonstrated. In this BOTDC, by employing frequency-hopping pump and probe waves, sensing information-crosstalk between adjacent pump pulses is avoided even though the pump pulse interval is shorter than the round-trip time of flight in the fiber. In the experiment, periodic mechanical vibrations with a 19.75 Hz fundamental frequency and a 39.49 Hz harmonic frequency are measured by a 10-frequency BOTDC with a sampling rate of 49 kHz which is 10 times higher than that in the BOTDA.