Abstract
We have demonstrated a long distance distributed vibration fiber-optic sensing system based on phase-sensitive optical time-domain reflectometer (φ-OTDR). Without any additional components, vibration detection utilizing heterodyne detection and digital coherent detection is successfully demonstrated over a 50-km-long optical fiber and the external disturbance signal simulated by PZT is well restored with signal-to-noise ratio (SNR) of ∼32.8 dB through phase difference method. For the first time, the distributed vibration sensing based on phase-extraction is realized in optical fiber over such a long distance. This measuring technique is ideal for applications in fields of oil and gas pipeline monitoring, national borders and can be further optimized to realize the longer sensing distance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
