Fast Brillouin optical time-domain reflectometry using the optical chirp chain reference wave

Dexin Ba, Benzhang Wang, Tianfu Li, Yijia Li, Dengwang Zhou, Yongkang Dong

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A new technique for the fast implementation of Brillouin optical time-domain reflectometry has been proposed and demonstrated with the optical chirp chain (OCC) reference wave. By using the fixed bandpass filter and envelope detection, the spontaneous Brillouin spectrum can be online demodulated in the time domain for truly distributed, one-end access and fast measurement. The measurement time is only limited by the pulse repetition rate and averaging times. For a 400 m single-mode fiber, a 31.58 Hz strain vibration on a 2 m fiber segment is measured for a wide dynamic range (∼3200 µε) with an equivalent sampling rate of 200 Hz when 200 times of averaging is performed. Furthermore, the performance on the measurement accuracy is investigated with different OCC frequency spans and durations.

Original languageEnglish
Pages (from-to)5460-5463
Number of pages4
JournalOptics Letters
Volume45
Issue number19
DOIs
StatePublished - 1 Oct 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Optical Society of America

Funding

Funding. National Key Scientific Instrument and Equipment Development Projects of China (2017YFF0108700); National Natural Science Foundation of China (61975045); Natural Science Foundation of Heilongjiang Province (LH2020F014).

FundersFunder number
National Natural Science Foundation of China61975045
Natural Science Foundation of Heilongjiang ProvinceLH2020F014
National Key Scientific Instrument and Equipment Development Projects of China2017YFF0108700

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