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ORIGINAL RESEARCH article

Adv. Opt. Technol.
Sec. Optical Manufacturing and Design
Volume 13 - 2024 | doi: 10.3389/aot.2024.1494705
This article is part of the Research Topic Optoelectronics, Ultrafast Optics, and Terahertz Radiations for Advanced Device Applications View all 3 articles

Rotational motion investigation in seismologyremote sensing by an optical fiber seismograph

Provisionally accepted
Anna T. Kurzych Anna T. Kurzych 1,2*Leszek R. Jaroszewicz Leszek R. Jaroszewicz 1,2Michał Dudek Michał Dudek 1,2
  • 1 Military University of Technology in Warsaw, Warsaw, Poland
  • 2 Elproma Elektronika Ltd., Czosnow, Poland

The final, formatted version of the article will be published soon.

    This paper aims to present data recorded by a three-axial Fiber-Optic Rotational Seismograph (FORS). The laboratory and field tests showed a high correlation coefficient above 99% between two seismographs signals during the external disturbance, with an amplitude ranging from 0.5 mrad/s to 1.2 rad/s. This is achieved by ensuring a 100 ns time synchronization in the systems. At the same time, the Allan Variance analysis was applied to determine the basic parameters of random errors of the presented seismographs. The performed analysis indicates the angular random walk of 35-45 nrad/s/√Hz and a bias instability below 50 nrad/s. FORS offers the widest dynamic range available, at 170 dB, which is crucial during rotational seismology exploration due to its wide range of interest from seismology to engineering applications. Finally, a field research is also presented during an explosion in a closed limestone quarry in the border area.

    Keywords: detection, Rotational seismology, Sagnac effect, rotational seismograph, Interferometer

    Received: 11 Sep 2024; Accepted: 28 Oct 2024.

    Copyright: © 2024 Kurzych, Jaroszewicz and Dudek. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Anna T. Kurzych, Military University of Technology in Warsaw, Warsaw, Poland

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