Abstract
A sensing system is proposed for quantitative and large-range measurement of dynamic nano-strain based on phase-sensitive optical time domain reflectometer (Φ-OTDR). The coherent detection and IQ demodulation methods are employed into the Φ-OTDR system to demodulate the phase of Rayleigh scattering light in real-time. By measuring phase differences between two adjacent sections, the nano-strain of quantitative and large strain measurement range is for the first time realized. The strain sensing range is 10-1000 nε, the strain resolution is 1 nε, the spatial resolution is 5 m, the strain parameter of phase is measured to be 0.04357 rad/nε, the strain-parameter of refractive index k is measured to be −0.3751 ε−1 and the frequency response is 185 Hz.
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.
