Normalized differential method for improving the signal-to-noise ratio of a distributed acoustic sensor
Alias, Mohd Sharizal
Ng, Tien Khee
Ooi, Boon S.
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Online Publication Date2019-06-14
Print Publication Date2019-06-20
Embargo End Date2020-06-14
Permanent link to this recordhttp://hdl.handle.net/10754/656085
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AbstractWe experimentally introduce a normalized differential method to enhance the time domain signal-to-noise ratio (SNR) of an optical fiber distributed acoustic sensor (DAS). The reported method is calibrated against the typical differential method in noisy DAS systems, including those utilizing a relatively wide linewidth laser or few-mode fiber. In these two systems, the normalized differential method respectively identifies the position information of various vibration events with 1.7 dB and 0.53 dB SNR improvement. We further demonstrate the ability to locate positions along a fiber that are subjected to vibrations of frequencies higher than the theoretical maximum, but without determining these frequencies.
SponsorsSaudi Aramco (RGC/3/3138-01); King Abdullah University of Science and Technology (KAUST) (BAS/1/1614-01-01, GEN/1/6607-01-01, KCR/1/2081-01-01).
PublisherThe Optical Society