Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications

A. Pospori, C.A.F. Marques, D. Sáez-Rodríguez, K. Nielsen, O. Bang, D.J. Webb

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

Abstract

Thermal annealing can be used to induce a permanent negative Bragg wavelength shift for polymer fibre grating sensors and it was originally used for multiplexing purposes. Recently, researchers showed that annealing can also provide additional benefits, such as strain and humidity sensitivity enhancement and augmented temperature operational range. The annealing process can change both the optical and mechanical properties of the fibre. In this paper, the annealing effects on the stress and force sensitivities of PMMA fibre Bragg grating sensors are investigated. The incentive for that investigation was an unexpected behaviour observed in an array of sensors which were used for liquid level monitoring. One sensor exhibited much lower pressure sensitivity and that was the only one that was not annealed. To further investigate the phenomenon, additional sensors were photo-inscribed and characterised with regard their stress and force sensitivities. Then, the fibres were annealed by placing them in hot water, controlling with that way the humidity factor. After annealing, stress and force sensitivities were measured again. The results show that the annealing can improve the stress and force sensitivity of the devices. This can provide better performing sensors for use in stress, force and pressure sensing applications.
Original languageEnglish
Title of host publicationSixth European Workshop on Optical Fibre Sensors
EditorsElfed Lewis
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages4
ISBN (Print)978-1-51060219-9
DOIs
Publication statusPublished - 30 May 2016
Event6th European Workshop on Optical Fibre Sensors - Ireland, Limerick, Ireland
Duration: 31 May 20163 Jun 2016

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume9916
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045

Conference

Conference6th European Workshop on Optical Fibre Sensors
Abbreviated titleEWOFS 2016
CountryIreland
CityLimerick
Period31/05/163/06/16

Fingerprint

Plastic optical fibers
Annealing
Sensors
Fibers
Atmospheric humidity
Fiber Bragg gratings
Multiplexing
Optical properties
Wavelength
Mechanical properties
Monitoring
Liquids
Polymers
Water

Bibliographical note

A. Pospori ; C. A. F. Marques ; D. Sáez-Rodríguez ; K. Nielsen ; O. Bang and D. J. Webb, "Sensitivity enhancement using annealed polymer optical-fibre-based sensors for pressure sensing applications", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160E (May 30, 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/10.1117/12.2236877

Funding: EU 7FP (FP7/2007-2013, REA grant agreement No. 608382) People Programme (Marie Curie Actions); and EU 7FP (projects PIEF-GA-2013-628604 and PIEF-GA-2011-302919) Marie Curie Intra European Fellowships.

Cite this

Pospori, A., Marques, C. A. F., Sáez-Rodríguez, D., Nielsen, K., Bang, O., & Webb, D. J. (2016). Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications. In E. Lewis (Ed.), Sixth European Workshop on Optical Fibre Sensors [99160E] (SPIE Proceedings; Vol. 9916). Bellingham, WA (US): SPIE. https://doi.org/10.1117/12.2236877
Pospori, A. ; Marques, C.A.F. ; Sáez-Rodríguez, D. ; Nielsen, K. ; Bang, O. ; Webb, D.J. / Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications. Sixth European Workshop on Optical Fibre Sensors. editor / Elfed Lewis. Bellingham, WA (US) : SPIE, 2016. (SPIE Proceedings).
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abstract = "Thermal annealing can be used to induce a permanent negative Bragg wavelength shift for polymer fibre grating sensors and it was originally used for multiplexing purposes. Recently, researchers showed that annealing can also provide additional benefits, such as strain and humidity sensitivity enhancement and augmented temperature operational range. The annealing process can change both the optical and mechanical properties of the fibre. In this paper, the annealing effects on the stress and force sensitivities of PMMA fibre Bragg grating sensors are investigated. The incentive for that investigation was an unexpected behaviour observed in an array of sensors which were used for liquid level monitoring. One sensor exhibited much lower pressure sensitivity and that was the only one that was not annealed. To further investigate the phenomenon, additional sensors were photo-inscribed and characterised with regard their stress and force sensitivities. Then, the fibres were annealed by placing them in hot water, controlling with that way the humidity factor. After annealing, stress and force sensitivities were measured again. The results show that the annealing can improve the stress and force sensitivity of the devices. This can provide better performing sensors for use in stress, force and pressure sensing applications.",
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Pospori, A, Marques, CAF, Sáez-Rodríguez, D, Nielsen, K, Bang, O & Webb, DJ 2016, Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications. in E Lewis (ed.), Sixth European Workshop on Optical Fibre Sensors., 99160E, SPIE Proceedings, vol. 9916, SPIE, Bellingham, WA (US), 6th European Workshop on Optical Fibre Sensors, Limerick, Ireland, 31/05/16. https://doi.org/10.1117/12.2236877

Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications. / Pospori, A.; Marques, C.A.F.; Sáez-Rodríguez, D.; Nielsen, K.; Bang, O.; Webb, D.J.

Sixth European Workshop on Optical Fibre Sensors. ed. / Elfed Lewis. Bellingham, WA (US) : SPIE, 2016. 99160E (SPIE Proceedings; Vol. 9916).

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

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T1 - Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications

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N1 - A. Pospori ; C. A. F. Marques ; D. Sáez-Rodríguez ; K. Nielsen ; O. Bang and D. J. Webb, "Sensitivity enhancement using annealed polymer optical-fibre-based sensors for pressure sensing applications", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160E (May 30, 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/10.1117/12.2236877 Funding: EU 7FP (FP7/2007-2013, REA grant agreement No. 608382) People Programme (Marie Curie Actions); and EU 7FP (projects PIEF-GA-2013-628604 and PIEF-GA-2011-302919) Marie Curie Intra European Fellowships.

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N2 - Thermal annealing can be used to induce a permanent negative Bragg wavelength shift for polymer fibre grating sensors and it was originally used for multiplexing purposes. Recently, researchers showed that annealing can also provide additional benefits, such as strain and humidity sensitivity enhancement and augmented temperature operational range. The annealing process can change both the optical and mechanical properties of the fibre. In this paper, the annealing effects on the stress and force sensitivities of PMMA fibre Bragg grating sensors are investigated. The incentive for that investigation was an unexpected behaviour observed in an array of sensors which were used for liquid level monitoring. One sensor exhibited much lower pressure sensitivity and that was the only one that was not annealed. To further investigate the phenomenon, additional sensors were photo-inscribed and characterised with regard their stress and force sensitivities. Then, the fibres were annealed by placing them in hot water, controlling with that way the humidity factor. After annealing, stress and force sensitivities were measured again. The results show that the annealing can improve the stress and force sensitivity of the devices. This can provide better performing sensors for use in stress, force and pressure sensing applications.

AB - Thermal annealing can be used to induce a permanent negative Bragg wavelength shift for polymer fibre grating sensors and it was originally used for multiplexing purposes. Recently, researchers showed that annealing can also provide additional benefits, such as strain and humidity sensitivity enhancement and augmented temperature operational range. The annealing process can change both the optical and mechanical properties of the fibre. In this paper, the annealing effects on the stress and force sensitivities of PMMA fibre Bragg grating sensors are investigated. The incentive for that investigation was an unexpected behaviour observed in an array of sensors which were used for liquid level monitoring. One sensor exhibited much lower pressure sensitivity and that was the only one that was not annealed. To further investigate the phenomenon, additional sensors were photo-inscribed and characterised with regard their stress and force sensitivities. Then, the fibres were annealed by placing them in hot water, controlling with that way the humidity factor. After annealing, stress and force sensitivities were measured again. The results show that the annealing can improve the stress and force sensitivity of the devices. This can provide better performing sensors for use in stress, force and pressure sensing applications.

U2 - 10.1117/12.2236877

DO - 10.1117/12.2236877

M3 - Conference contribution

SN - 978-1-51060219-9

T3 - SPIE Proceedings

BT - Sixth European Workshop on Optical Fibre Sensors

A2 - Lewis, Elfed

PB - SPIE

CY - Bellingham, WA (US)

ER -

Pospori A, Marques CAF, Sáez-Rodríguez D, Nielsen K, Bang O, Webb DJ. Sensitivity enhancement using annealed polymer optical fibre based sensors for pressure sensing applications. In Lewis E, editor, Sixth European Workshop on Optical Fibre Sensors. Bellingham, WA (US): SPIE. 2016. 99160E. (SPIE Proceedings). https://doi.org/10.1117/12.2236877