Interferogram Reconstruction of Cascaded Coaxial Cable Fabry-Perot Interferometers for Distributed Sensing Application


This paper describes a distributed sensing concept using coaxial cable-based Fabry-Perot interferometers (CCFPIs). Multiple reflectors are implemented along a coaxial cable, where every two consecutive reflectors can be considered as a low finesse CCFPI, which has a relatively weak reflection coefficient and insertion loss. The interferogram in a frequency domain of each individual CCFPI could be reconstructed through the proposed signal processing method, so that the phase detection could be applied to any CCFPIs on one cable to achieve high measurement accuracy. A large capacity sensor network with a relatively high measurement accuracy can be implemented simultaneously. The concept takes advantage of the time-domain multiplexing method and the pure frequency domain measurement, which is herein called a joint-time-frequency demodulation technique. Due to its effectiveness and robustness, the device is especially attractive for structural, downhole, or underwater applications.


Electrical and Computer Engineering

Research Center/Lab(s)

Center for High Performance Computing Research


United States. Department of Energy
National Energy Technology Laboratory (U.S.)
National Science Foundation (U.S.)
Natural Science Foundation of China


This work was supported in part by the U.S. Department of Energy/National Energy Technology Laboratory under Grant DE-FE0009843, in part by the National Science Foundation within the Division of Civil, Mechanical and Manufacturing Innovation under Grant CMMI-1100185, and in part by the National Natural Science Foundation of China under Grant 61328501.

Keywords and Phrases

Cables; Coaxial cables; Frequency domain analysis; Interferometers; Interferometry; Reflection; Sensor networks; Signal processing; Time domain analysis; Capacity sensors; Coaxial cable sensors; Distributed sensing; Frequency domain measurement; Frequency domains; Interferograms; Measurement accuracy; Underwater application; Fabry-Perot interferometers; Coaxial cable sensor; Distributed sensing

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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© 2016 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jun 2016