Performance analysis of polymer optical fibre based Fabry-Perot sensor formed by two uniform Bragg gratings

A. Pospori, D.J. Webb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The stress sensitivity of polymer optical fibre (POF) based Fabry-Perot sensors formed by two uniform Bragg gratings with finite dimensions is investigated. POF has received high interest in recent years due to its different material properties compared to its silica counterpart. Biocompatibility, a higher failure strain and the highly elastic nature of POF are some of the main advantages. The much lower Young’s modulus of polymer materials compared to silica offers enhanced stress sensitivity to POF based sensors which renders them great candidates for acoustic wave receivers and any kind of force detection. The main drawback in POF technology is perhaps the high fibre loss. In a lossless fibre the sensitivity of an interferometer is proportional to its cavity length. However, the presence of the attenuation along the optical path can significantly reduce the finesse of the Fabry-Perot interferometer and it can negatively affect its sensitivity at some point. The reflectivity of the two gratings used to form the interferometer can be also reduced as the fibre loss increases. In this work, a numerical model is developed to study the performance of POF based Fabry-Perot sensors formed by two uniform Bragg gratings with finite dimensions. Various optical and physical properties are considered such as grating physical length, grating effective length which indicates the point where the light is effectively reflected, refractive index modulation of the grating, cavity length of the interferometer, attenuation and operating wavelength. Using this model, we are able to identify the regimes in which the PMMA based sensor offer enhanced stress sensitivity compared to silica based one.
Original languageEnglish
Title of host publicationMicro-Structured and Specialty Optical Fibres
EditorsKyriacos Kalli, Alexis Mendez
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages10
DOIs
Publication statusPublished - 3 Apr 2016
EventMicro-Structured and Specialty Optical Fibres IV - SQUARE Brussels Meeting Centre, Brussels, Belgium
Duration: 4 Apr 20166 Apr 2016

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume9886
ISSN (Print)0277-786X

Conference

ConferenceMicro-Structured and Specialty Optical Fibres IV
CountryBelgium
CityBrussels
Period4/04/166/04/16

Bibliographical note

-Andreas Pospori, David J. Webb, " Performance analysis of polymer optical fibre based Fabry-Perot sensor formed by two uniform Bragg gratings ", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98861F (April 27, 2016).

Copyright 2016 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

DOI: http://dx.doi.org/10.1117/12.2227481

Funding: People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-2013/ under REA grant agreement No. 60838

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  • Research Output

    • 1 Conference contribution

    Annealing effects on strain and stress sensitivity of polymer optical fibre based sensors

    Pospori, A., Marques, C. A. F., Zubel, M. G., Sáez-Rodríguez, D., Nielsen, K., Bang, O. & Webb, D. J., 27 Apr 2016, Micro-Structured and Specialty Optical Fibres. Kalli, K. & Mendez, A. (eds.). Bellingham, WA (US): SPIE, 7 p. 98860V. (SPIE Proceedings; vol. 9886).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    Pospori, A., & Webb, D. J. (2016). Performance analysis of polymer optical fibre based Fabry-Perot sensor formed by two uniform Bragg gratings. In K. Kalli, & A. Mendez (Eds.), Micro-Structured and Specialty Optical Fibres [98861F] (SPIE Proceedings; Vol. 9886). SPIE. https://doi.org/10.1117/12.2227481