Browsing by Author "Özdur, İbrahim"
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Item Open Access 94.8 km-range direct detection fiber optic distributed acoustic sensor(Optical Society of America(OSA), 2019) Uyar, Faruk; Uyar, Talha; Ünal, Canberk; Kartaloğlu, Tolga; Özdur, İbrahim; 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.Item Open Access The investigation of Rayleigh backscattered signal statistics in a φ-OTDR system incorporating optical pre-amplifier(IEEE, 2020) Uyar, Faruk; Kartaloğlu, Tolga; Özbay, Ekmel; Özdur, İbrahimWe theoretically model and experimentally demonstrate the photon statistics of Rayleigh backscattered signal in a ϕ-OTDR based distributed fiber optical sensor in the presence of amplified spontaneous emission noise caused by optical pre-amplifier.Item Open Access A Simple method for enhancing the SNR in direct detection φ-OTDR based distributed acoustic sensors(IEEE, 2020) Uyar, Faruk; Kartaloğlu, Tolga; Ünal, Canberk; Özbay, Ekmel; Özdur, İbrahimA simple and effective method for increasing the SNR and range in φ-OTDR based direct-detection distributed acoustic sensors is proposed and experimentally verified. The proposed method results in ~11 dB SNR improvement at 66 km.