Normalized differential method for improving the signal-to-noise ratio of a distributed acoustic sensor

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

doi:10.1364/ao.58.004933

Normalized differential method for improving the signal-to-noise ratio of a distributed acoustic sensor

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

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

We 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.

Original language	English (US)
Pages (from-to)	4933
Journal	Applied Optics
Volume	58
Issue number	18
DOIs	https://doi.org/10.1364/ao.58.004933
State	Published - Jun 14 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1614-01-01, GEN/1/6607-01-01, KCR/1/2081-01-01
Acknowledgements: Saudi 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).

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10.1364/ao.58.004933

https://repository.kaust.edu.sa/bitstream/10754/656085/1/Normalized%20differential%20method%20for%20improving%20the%20signal-to-noise%20ratio%20of%20distributed%20acoustic%20sensor.pdf

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title = "Normalized differential method for improving the signal-to-noise ratio of a distributed acoustic sensor",

abstract = "We 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.",

author = "Islam Ashry and Yuan Mao and Alias, {Mohd Sharizal} and Ng, {Tien Khee} and Frode Hveding and Muhammad Arsalan and Ooi, {Boon S.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): BAS/1/1614-01-01, GEN/1/6607-01-01, KCR/1/2081-01-01 Acknowledgements: Saudi 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).",

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doi = "10.1364/ao.58.004933",

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AU - Ashry, Islam

AU - Mao, Yuan

AU - Alias, Mohd Sharizal

AU - Ng, Tien Khee

AU - Hveding, Frode

AU - Arsalan, Muhammad

AU - Ooi, Boon S.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): BAS/1/1614-01-01, GEN/1/6607-01-01, KCR/1/2081-01-01 Acknowledgements: Saudi 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).

PY - 2019/6/14

Y1 - 2019/6/14

N2 - We 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.

AB - We 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.

UR - http://hdl.handle.net/10754/656085

UR - https://www.osapublishing.org/abstract.cfm?URI=ao-58-18-4933

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SP - 4933

JO - Applied Optics

JF - Applied Optics

IS - 18

ER -

Normalized differential method for improving the signal-to-noise ratio of a distributed acoustic sensor

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