Abstract
In this paper, a simple and low-cost phase demodulation scheme for phase sensitive optical time domain reflectometer (φ-OTDR) sensing system is proposed and investigated. By utilizing simulated coherence between different back-scattering beat signals, digital phase demodulation for vibration detection can be achieved without employing hardware phase demodulation components. Experiments were conducted and the results demonstrated that the vibration induced phase change within different lengths of sensing optical fiber can be obtained sensitively by the proposed digital processing demodulation scheme that effectively avoid the noise caused by the hardware and reduce the complexity of the distributed optical fiber sensing system.
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.
