Work

Distributed vibration sensing with time-resolved optical frequency-domain reflectometry

Year: 2012

Type: article

Abstract: The distributed vibration or dynamic strain information can be obtained using time-resolved optical frequency-domain reflectometry. Time-domain information is resolved by measuring Rayleigh backscatter spectrum in different wavelength ranges which fall in successive time sequence due to the linear wavelength sweep of the tunable laser source with a constant sweeping rate. The local Rayleigh backscatter spectrum shift of the vibrated state with respect to that of the non-vibrated state in time sequence can be used to determine dynamic strain information at a specific position along the fiber length. Standard single-mode fibers can be used as sensing head, while the measurable frequency range of 0-32 Hz with the spatial resolution of 10 cm can be achieved up to the total length of 17 m.

Source: Optics Express

DOI: 10.1364/oe.20.013138

Authors: Da-Peng Zhou, Zengguang Qin, Wenhai Li, Liang Chen, Xiaoyi Bao

Institution: University of Ottawa

Language: English

Topic: Advanced Fiber Optic Sensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Natural Sciences and Engineering Research Council of Canada