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Regular | Open Access

Nanostrain Measurement Using Chirped Bragg Grating Fabry-Perot Interferometer

Ricardo M. SILVA, Marta S. FERREIRA, José L. SANTOS, Orlando FRAZÃO( )
INESC Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal and Faculty of Sciences of University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
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Abstract

A simple nanostrain direct current (DC) measurement system based on a chirped Bragg grating Fabry-Perot (FP) structure is presented. The FP cavity, formed between the chirped fiber Bragg grating (CFBG) and the fiber end face, presents an aperiodic behavior due to the CFBG. A laser located in the fringe pattern slope is used to interrogate the sensing head. The optical power parameter is analyzed when strain is applied, for long and short period fringe pattern wavelengths, and sensitivities of −2.87 μW/μɛ and −5.48 μW/μɛ are respectively obtained. This configuration presents a resolution of 70 nɛ.

Keywords

Optical fiber sensorFabry-Perot interferometerchirped fiber Bragg grating

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Photonic Sensors
Volume 2 Issue 1,
March 2012
Pages 77-80
DOI: 10.1007/s13320-011-0037-0

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SILVA RM, FERREIRA MS, SANTOS JL, et al. Nanostrain Measurement Using Chirped Bragg Grating Fabry-Perot Interferometer. Photonic Sensors, 2012, 2(1): 77-80. https://doi.org/10.1007/s13320-011-0037-0

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Received: 30 April 2011
Revised: 30 May 2011
Published: 18 August 2011
© The Author(s) 2011.

This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.