Photonic Sensors

, Volume 7, Issue 3, pp 193–198 | Cite as

Distributed acoustic sensing with Michelson interferometer demodulation

  • Xiaohui Liu
  • Chen Wang
  • Ying Shang
  • Chang Wang
  • Wenan Zhao
  • Gangding Peng
  • Hongzhong Wang
Open Access


The distributed acoustic sensing (DAS) has been extensively studied and widely used. A distributed acoustic sensing system based on the unbalanced Michelson interferometer with phase generated carrier (PGC) demodulation was designed and tested. The system could directly obtain the phase, amplitude, frequency response, and location information of sound wave at the same time and measurement at all points along the sensing fiber simultaneously. Experiments showed that the system successfully measured the acoustic signals with a phase-pressure sensitivity about–148 dB (re rad/μPa) and frequency response ripple less than 1.5 dB. The further field experiment showed that the system could measure signals at all points along the sensing fiber simultaneously.


Distributed acoustic sensing phase generated carrier interferometer frequency response 



This work was supported by two Science and Technology Development Projects (2014GGX103019 and 2015GSF120001) of Shandong Province, and Independent Innovation Major Project (2014ZZCX04206) of Shandong Province.


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Copyright information

© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Xiaohui Liu
    • 1
  • Chen Wang
    • 1
  • Ying Shang
    • 1
  • Chang Wang
    • 1
  • Wenan Zhao
    • 1
  • Gangding Peng
    • 1
    • 2
  • Hongzhong Wang
    • 3
  1. 1.Shandong Key Laboratory of Optical Fiber Sensing TechnologiesLaser Institute of Shandong Academy of SciencesJinan, ShandongChina
  2. 2.School of Electrical Engineering & Telecommunicationsthe University of New South WalesSydneyAustralia
  3. 3.Shengli Oilfield Xinsheng Geophysical Technology Co. Ltd.Dongying, ShandongChina

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