Investigating the Performance of a Few-Mode Fiber for Distributed Acoustic Sensing

Yuan Mao, Islam Ashry, Mohd Sharizal Alias, Tien Khee Ng, Frode Hveding, Muhammad Arsalan, Boon S. Ooi

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


We experimentally investigated the performance of a distributed acoustic sensor (DAS) designed using a few-mode fiber (FMF), when launching different spatial modes under intentional index perturbation within the fiber. Our demonstration showed that the quasi-single mode (QSM) operated FMF offers higher signal-to-noise ratio (SNR) for the DAS, compared with the case when launching other degenerate higher order modes. Additionally, we compared the behavior of the single-mode fiber (SMF)- and FMF-based DAS when using optical pulses of varying power levels. The FMF enables the realization of a DAS with longer sensing range and higher spatial resolution. The developed FMF-based DAS is further tested via sensing various vibration events produced by piezoelectric transducer (PZT) cylinder, pencil break, and loudspeaker.
Original languageEnglish (US)
Pages (from-to)1-10
Number of pages10
JournalIEEE Photonics Journal
Issue number5
StatePublished - Sep 17 2019


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