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Sensors 2017, 17(4), 859; doi:10.3390/s17040859

A Theoretical Study and Numerical Simulation of a Quasi-Distributed Sensor Based on the Low-Finesse Fabry-Perot Interferometer: Frequency-Division Multiplexing

1
Computing and Electronic Departments, Centro Universitario de Ciencias Exactas e Ingenierías (CUCEI), University of Guadalajara, Blvd. M. García Barragán 1421, 44410 Guadalajara, Jalisco, Mexico
2
Mathematic Department, Centro Universitario de Ciencias Exactas e Ingenierías (CUCEI), University of Guadalajara, Blvd. M. García Barragán 1421, 44410 Guadalajara, Jalisco, Mexico
3
Departamento de Ciencias Computacionales, Centro Universitario de los Valles, Universidad de Guadalajara, Ameca Km 45.5, C.P. 46600 Ameca, Jalisco, Mexico
4
Materials Science Graduate School, Centro Universitario de Ciencias Exactas e Ingenierías (CUCEI), University of Guadalajara, Blvd. M. GarcíaBarragán 1421, 44410 Guadalajara, Jalisco, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: Yuh-Shyan Chen
Received: 17 February 2017 / Revised: 11 April 2017 / Accepted: 12 April 2017 / Published: 14 April 2017
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [1604 KB, uploaded 14 April 2017]   |  

Abstract

The application of the sensor optical fibers in the areas of scientific instrumentation and industrial instrumentation is very attractive due to its numerous advantages. In the industry of civil engineering for example, quasi-distributed sensors made with optical fiber are used for reliable strain and temperature measurements. Here, a quasi-distributed sensor in the frequency domain is discussed. The sensor consists of a series of low-finesse Fabry-Perot interferometers where each Fabry-Perot interferometer acts as a local sensor. Fabry-Perot interferometers are formed by pairs of identical low reflective Bragg gratings imprinted in a single mode fiber. All interferometer sensors have different cavity length, provoking frequency-domain multiplexing. The optical signal represents the superposition of all interference patterns which can be decomposed using the Fourier transform. The frequency spectrum was analyzed and sensor’s properties were defined. Following that, a quasi-distributed sensor was numerically simulated. Our sensor simulation considers sensor properties, signal processing, noise system, and instrumentation. The numerical results show the behavior of resolution vs. signal-to-noise ratio. From our results, the Fabry-Perot sensor has high resolution and low resolution. Both resolutions are conceivable because the Fourier Domain Phase Analysis (FDPA) algorithm elaborates two evaluations of Bragg wavelength shift. View Full-Text
Keywords: quasi-distributed sensor; low-finesse Fabry-Perot interferometer; sensor simulation; frequency-domain multiplexing and resolution vs. signal-to-noise ratio quasi-distributed sensor; low-finesse Fabry-Perot interferometer; sensor simulation; frequency-domain multiplexing and resolution vs. signal-to-noise ratio
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Guillen Bonilla, J.T.; Guillen Bonilla, A.; Rodríguez Betancourtt, V.M.; Guillen Bonilla, H.; Casillas Zamora, A. A Theoretical Study and Numerical Simulation of a Quasi-Distributed Sensor Based on the Low-Finesse Fabry-Perot Interferometer: Frequency-Division Multiplexing. Sensors 2017, 17, 859.

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