Standard single-mode fiber and hollow-core fiber sensitivity to acoustic vibrations in audible spectrum

Petr Dejdar; Pavel Zaviska; Adrian Tomasov; Tomas Horvath; Petr Munster

doi:10.1117/12.3022465

20 June 2024 Standard single-mode fiber and hollow-core fiber sensitivity to acoustic vibrations in audible spectrum

Petr Dejdar, Pavel Zaviska, Adrian Tomasov, Tomas Horvath, Petr Munster

Proceedings Volume 12999, Optical Sensing and Detection VIII; 129992R (2024) https://doi.org/10.1117/12.3022465
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

Hollow-core fibers (HCF) are increasingly being studied and evaluated for telecommunication, as well as sensing application. They seem to have many advantages compare to standard single-mode fibers (SMF), especially in the area of the cyber-security of optical fiber infrastructures and also information they carrying. In our research we mainly focus on cyber-security issues, especially acoustic sensing. In the paper we evaluate sensitivity of negative curve HCF using a Mach–Zehnder interferometry (MZI). Results are compared with SMF (G.657 in this case). Both fibers were in primary coating with similar length. Sensitivity measurements were conducted within the controlled environment of an anechoic chamber. Results show that both fibers are sensitive to acoustic vibration and with post-processing method based on de-noising of the measured signal, the sensitivity can be improved. The clarity of the captured speech signal was assessed using the Speech Transmission Index for Public Address (STIPA).

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Petr Dejdar, Pavel Zaviska, Adrian Tomasov, Tomas Horvath, and Petr Munster "Standard single-mode fiber and hollow-core fiber sensitivity to acoustic vibrations in audible spectrum", Proc. SPIE 12999, Optical Sensing and Detection VIII, 129992R (20 June 2024); https://doi.org/10.1117/12.3022465

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