Abstract

This paper reports a distributed fiber optic sensing technique through microwave assisted separation and reconstruction of optical interferograms in spectrum domain. The approach involves sending a microwave-modulated optical signal through cascaded fiber optic interferometers. The microwave signal was used to resolve the position and reflectivity of each sensor along the optical fiber. By sweeping the optical wavelength and detecting the modulation signal, the optical spectrum of each sensor can be reconstructed. Three cascaded fiber optic extrinsic Fabry-Perot interferometric sensors were used to prove the concept. Their microwave-reconstructed interferogram matched well with those recorded individually using an optical spectrum analyzer. The application in distributed strain measurement has also been demonstrated.

Department(s)

Electrical and Computer Engineering

Sponsor(s)

National Science Foundation (U.S.)

Comments

The research work was supported by the National Science Foundation under the contract CMMI-1200787.

Keywords and Phrases

Distributed strain measurement; Extrinsic Fabry-Perot interferometric sensor; Fiber-optic interferometers; Fiber-optic sensing; Modulation signals; Optical interferograms; Optical spectrum analyzer; Optical wavelength; Fiber optics; Interferometry; Microwaves; Optical fibers; Spectrum analyzers; Microwave sensors; article; Computer aided design; Equipment; Equipment design; Equipment failure; Fiber optics; Interferometry; Microwave radiation; Refractometry; Transducer; Device failure analysis; Devices; Fiber optics; Interferometry; Refractometry; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Fiber Optic Technology; Interferometry; Microwaves; Refractometry; Transducers; Equipment Design; Equipment Failure Analysis; Fiber Optic Technology; Interferometry; Microwaves; Refractometry; Transducers

International Standard Serial Number (ISSN)

1094-4087

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2013 Optical Society of America, All rights reserved.

Publication Date

01 Jul 2013

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