Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/395
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Conference Object Performance Analysis of Specialty Fiber Optic Cables for Distributed Acoustic Sensing(Optica Publishing Group (Formerly OSA), 2020) Uyar, Faruk; Kartaloǧlu, Tolga; Erol, Mustafa; Özbay, Ekmel; Ozdur, Ibrahim T.In this work, we present the signal-to-noise ratio comparison results of six different buried fiber optic cable for identical external perturbations using a home-made direct detection φ-OTDR system. © 2023 Elsevier B.V., All rights reserved.Conference Object Citation - WoS: 3Citation - Scopus: 5Field Test and Fading Measurement of a Distributed Acoustic Sensor System Over a 50 Km-Long Fiber(Spie-Int Soc Optical Engineering, 2018-05-14) Uyar, Faruk; Kartaloglu, Tolga; Ozdur, Ibrahim; Ozbay, EkmelIn this study, we present a direct detection distributed acoustic sensor based on phase-sensitive optical time domain reflectometer (phi-OTDR) with long sensing range and high signal-to-noise ratio (SNR), which is field-tested over a 50 km-long fiber. Due to the random nature of Rayleigh backscattered light and fading phenomena, it is hard to characterize the performance of the system. For this reason, the performance of our sensor is specified in a statistical manner in which the mean SNR is determined using the histograms of the SNR. The SNR values are measured for identical acoustic signals in five different days, total of 48 hours and the SNR histograms are obtained for fiber distances of 100 m, 12 km, 21 km, 30 km, 40 km and 50 km. The system is field-tested using external disturbances that are generated from a 50-Hz vibrator. The SNR values are extracted from the power spectral density (psd) of the collected data over the monitored fiber span. Our results show that the phi-OTDR system exhibits a mean SNR of 22.5 dB at 50 km distance.Conference Object Experimental Analysis of Non-Linear Phenomena due To Perturbation Amplitude in Φ-OTDR Based Fiber Optic Distributed Vibration Sensor(Optica Publishing Group (Formerly OSA), 2020) Uyar, Faruk; Kartaloǧlu, Tolga; Özbay, Ekmel; Ozdur, Ibrahim T.We experimentally analyze the non-linearity effect due to the perturbation amplitude in the φ-OTDR based fiber optic distributed vibration sensor by investigating the effects of large disturbance signal. © 2023 Elsevier B.V., All rights reserved.Conference Object Citation - WoS: 2Citation - Scopus: 394.8 Km-Range Direct Detection Fiber Optic Distributed Acoustic Sensor(Institute of Electrical and Electronics Engineers Inc., 2019) Uyar, Faruk; Onat, Talha; Unal, Canberk; Kartaloǧlu, Tolga; Ozdur, Ibrahim T.; Özbay, EkmelThis work demonstrates an ultra-long range direct detection fiber optic distributed acoustic sensor which can detect vibrations at a distance of 94.8 km with 10 m resolution along the sensing fiber. © 2019 Elsevier B.V., All rights reserved.