Xizi Sun

TL;DR: A technique is proposed, encoding the interrogating light signal by a single-sequence aperiodic code and spatially resolving the fibre information through a fast post-processing, enabling a performance enhancement using an unmodified conventional configuration for the sensor.

TL;DR: It is demonstrated that BFS error around hotspot is greatly reduced compare to the conventional Lorentzian fitting and dual LorentZian fitting schemes.

TL;DR: The experimental results indicate that the error of BFS extracted by the proposed algorithm is the same as that of the other schemes when no hotspot is presented and the error is smaller in cross-correlation based schemes than that in Lorentzian fitting scheme around hotspot.

TL;DR: In this paper, noise models for both single-pulse and coded Brillouin optical time-domain analyzers (BOTDA) are established to quantify the actual signal-to-noise ratio (SNR) enhancement provided by pulse coding at any fiber position and in any operating condition.

TL;DR: In this paper , a Brillouin optical time-domain analysis (BOTDA) scheme based on hybrid amplification, consisting of distributed Raman amplification and lumped amplification provided by remotely pumped Erbium-doped fibers, is proposed and thorougly studied, enabling longest sensing distance among existing repeaterless techniques.