Distributed temperature sensing based on slope-assisted Brillouin optical correlation-domain reflectometry with over 10 km measurement range

H. Lee, K. Noda, Y. Mizuno, K. Nakamura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The authors demonstrate distributed temperature sensing based on slope-assisted Brillouin optical correlation-domain reflectometry (BOCDR) with a long measurement range of >10 km. They find that to achieve such a long-range measurement, a delay line in a reference path needs to be at least four times longer than the sensing fibre. In addition, they show that the use of such a long delay line induces forward-propagating Brillouin-scattered light in the reference path, which deteriorates the signal-to-noise ratio (SNR) of the system and should be suppressed. Finally, by exploiting a beyond-nominal-resolution effect of the slope-assisted BOCDR, they detect a 3-m-long heated section in a 13-km-long silica fibre in a distributed manner; the reason for its low SNR is also discussed.

Original languageEnglish
Pages (from-to)276-278
Number of pages3
JournalElectronics Letters
Volume55
Issue number5
DOIs
Publication statusPublished - 2019 Mar 7
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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