title: Long-range vibration sensor based on correlation analysis of optical frequency-domain reflectometry signals.
abstract: We present a novel method to achieve a space-resolved long- range vibration detection system based on the correlation analysis of the optical frequency-domain reflectometry (OFDR) signals. By performing two separate measurements of the vibrated and non-vibrated states on a test fiber, the vibration frequency and position of a vibration event can be obtained by analyzing the cross-correlation between beat signals of the vibrated and non-vibrated states in a spatial domain, where the beat signals are generated from interferences between local Rayleigh backscattering signals of the test fiber and local light oscillator. Using the proposed technique, we constructed a standard single-mode fiber based vibration sensor that can have a dynamic range of 12 km and a measurable vibration frequency up to 2 kHz with a spatial resolution of 5 m. Moreover, preliminarily investigation results of two vibration events located at different positions along the test fiber are also reported.
authors.affiliation: College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, 300072, China.
authors.forename: Zhenyang
authors.initials: Z
authors.lastname: Ding
authors.forename: X Steve
authors.initials: XS
authors.lastname: Yao
authors.forename: Tiegen
authors.initials: T
authors.lastname: Liu
authors.forename: Yang
authors.initials: Y
authors.lastname: Du
authors.forename: Kun
authors.initials: K
authors.lastname: Liu
authors.forename: Qun
authors.initials: Q
authors.lastname: Han
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Meng
authors.forename: Hongxin
authors.initials: H
authors.lastname: Chen
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D010783:Photometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers; D014732:Vibration