Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/6268
Title: Analysis of Optical Fading In Phase-OTDR Distributed Acoustic Sensing Systems: The Effects of Fading in Threat Detection
Authors: Aktaş, Metin
Maral, Hakan
Akgün, Toygar
Keywords: OTDR
phase-OTDR
fading
extinction ratio
distributed acoustic sensing
Issue Date: 2018
Publisher: Spie-Int Soc Optical Engineering
Source: Conference on Environmental Effects on Light Propagation and Adaptive Systems -- SEP 12-13, 2018 -- Berlin, GERMANY
Series/Report no.: Proceedings of SPIE
Abstract: Signal fading is a widely observed phenomenon in communication and sensing applications that results in spatially and temporally varying degradations in the received signal power. Specifically, for distributed acoustic sensing (DAS) applications based on phase sensitive Optical Time Domain Reflectometry (phase-OTDR), it is reported that optical signal fading is observed as random dramatic signal power fluctuations, which in turn cause substantial variations in threat detection sensitivity. In this paper, we study optical signal fading in the context of phase-OTDR based DAS from a signal processing perspective and analyze the undesired effects of fading on threat detection performance. Using a detailed phase-OTDR signal model, we analyze the effects of internal system parameters and external vibration source characteristics on optical fading. Based on these analyses, we define the conditions under which optical fading can manifest itself as a dramatic variation in threat detection performance.
URI: https://doi.org/10.1117/12.2325641
https://hdl.handle.net/20.500.11851/6268
ISBN: 978-1-5106-2158-9
ISSN: 0277-786X
1996-756X
Appears in Collections:Bilgisayar Mühendisliği Bölümü / Department of Computer Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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