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Title: Averaging-free vector Brillouin optical time domain analyzer assisted by reference probe lightwave
Authors: Guo, N 
Zhang, XT 
Jin, C 
Zhao, ZY 
Wang, L
Tam, HY 
Lu, C 
Issue Date: 2018
Publisher: Optical Society of America
Source: Optics express, 24 Dec. 2018, v. 26, no. 26, p. 33993-34001 How to cite?
Journal: Optics express 
Abstract: We propose and experimentally demonstrate a vector Brillouin optical time domain analyzer (BOTDA) system, which enables both distributed Brillouin gain spectrum (BGS) and Brillouin phase-shift spectrum (BPS) measurements without trace averaging. The proposed scheme generates and launches a reference light into the fiber under test (FUT), together with the Stokes probe light to indicate the phase noise and distortion in the probe. The commercial integrated coherent receiver at the detection end, using a local oscillator (LO) generated with single sideband (SSB) modulation, on the one hand, improves the signal-to-noise ratio (SNR) to avoid tlx need of trace averaging for the signal acquisition. On the other hand, by processing and analyzing the receiver outputs at specific intermediate frequencies (IF), the amplitude and phase signals carried by the Stokes probe and the reference light can be resolved at once. In this way, both Brillouin gain and Brillouin phase-shift signals can be obtained simultaneously. By scanning the the Stokes probe light frequency and recording the Brillouin response at each scanning frequency, both distributions of Brillouin gain spectrum and phase-shift spectrum have been acquired. The configuration is approved by experiments carried out over an 18.2 km FUT with the spatial resolution of 2 m.
EISSN: 1094-4087
DOI: 10.1364/OE.26.033993
Rights: © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
© 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Journal © 2018
The following publication Guo, N., Zhang, X. T., Jin, C., Zhao, Z. Y., Wang, L., Tam, H. Y., & Lu, C. (2018). Averaging-free vector Brillouin optical time domain analyzer assisted by reference probe lightwave. Optics Express, 26(26), 33993-34001 is available at
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