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Fibers 2014, 2(2), 142-149; doi:10.3390/fib2020142

Ultra-High Sensitive Strain Sensor Based on Post-Processed Optical Fiber Bragg Grating

1
INESC Porto, Rua do Campo Alegre, 687, Porto 4169-007, Portugal
2
Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, Porto 4169-007, Portugal
3
IPHT Jena, Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena 07745, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 28 December 2013 / Revised: 28 March 2014 / Accepted: 8 April 2014 / Published: 14 April 2014
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Abstract

An ultra-high sensitive strain sensor is proposed. The sensing head, based on the post-processing of a fiber Bragg grating, is used to perform passive and active strain measurements. Both wavelength and full width half maximum dependences with the applied strain are studied for the passive sensor, where maximum sensitivities of 104.1 pm/µε and 61.6 pm/µε are respectively obtained. When combining the high performance of this sensor with a ring laser cavity configuration, the Bragg grating will act as a filter and high resolution measurements can be performed. With the proposed sensor, a resolution of 700 nε is achieved. View Full-Text
Keywords: strain sensor; post-processing; fiber Bragg grating strain sensor; post-processing; fiber Bragg grating
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Ferreira, M.S.; Bierlich, J.; Becker, M.; Schuster, K.; Santos, J.L.; Frazão, O. Ultra-High Sensitive Strain Sensor Based on Post-Processed Optical Fiber Bragg Grating. Fibers 2014, 2, 142-149.

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