Characterization of Brillouin frequency shift in Brillouin Optical Time Domain Analysis (BOTDA)

Nageswara Lalam, Wai Pang Ng, Xuewu Dai, Hassan Al-Musawi

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

5 Citations (Scopus)

Abstract

In this paper, we have characterised Brillouin frequency shift (BFS) in single mode silica fibre. In particular, BFS was characterised in conventional Brillouin Optical Time Domain Analysis (BOTDA) at operating wavelength of 1550 nm by a pump-probe technique. In addition, we also presented Brillouin gain and Brillouin loss mechanism in BOTDA sensing system. The simulation results shows, BFS have strong linear relationship with acoustic velocity and applied strain along the sensing fibre. A frequency shift of 60 MHz was obtained for each 0.1% strain (1000 μ-strain) on fibre. From the measurement results, it was evident that the each μ-strain on the fibre the frequency shift was found as 0.06 MHz. Therefore, BOTDA sensing system based on BFS is a promoting technique for structural health monitoring.
Original languageEnglish
Title of host publicationProceedings of the 2015 20th European Conference on Networks and Optical Communications - (NOC)
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages1-4
Number of pages144
ISBN (Print)9781479987993
Publication statusPublished - 28 Jul 2015
Event20th IEEE European Conference on Network and Optical Communications (NOC) - London
Duration: 28 Jul 2015 → …

Conference

Conference20th IEEE European Conference on Network and Optical Communications (NOC)
Period28/07/15 → …

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