Temperature and strain discriminating sensor based on the monitoring of cladding modes of a single femtosecond inscribed grating

Nemanja Jovanovic*, Robert J. Williams, Jens Thomas, M. J. Steel, Graham D. Marshall, Alexander Fuerbach, Stefan Nolte, Andreas Tünnermann, Michael J. Withford

*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

In this paper we demonstrate a simple temperature and strain discriminating sensor based on a single fibre Bragg grating inscribed by a femtosecond laser via the point-by-point technique. These gratings exhibit strong and extensive cladding mode structures and by simultaneously monitoring both the Bragg wavelength and a cladding mode spaced by ∼ 40 nm from the Bragg peak, as a function of both temperature and strain, it is possible to distinguish between the two effects and potentially obtain and increased sensitivity over prior reports for similar systems. In preliminary experiments the two parameters were determined with an accuracy of 1°C and 40 με respectively. Due to the close spectral separation of the two peaks that were monitored, quick and simultaneously measurements of the two parameters was possible, allowing for real time measurements of the temperature and strain and making the device practical for use in various applications.

Original languageEnglish
Title of host publication20th International Conference on Optical Fibre Sensors
Place of PublicationWashington, USA
PublisherSPIE
Number of pages4
VolumePart One
ISBN (Print)9780819478146
DOIs
Publication statusPublished - 2009
Event20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom
Duration: 5 Oct 20099 Oct 2009

Publication series

NameProceedings of SPIE
Volume7503
ISSN (Electronic)0277-786X

Other

Other20th International Conference on Optical Fibre Sensors
CountryUnited Kingdom
CityEdinburgh
Period5/10/099/10/09

    Fingerprint

Cite this

Jovanovic, N., Williams, R. J., Thomas, J., Steel, M. J., Marshall, G. D., Fuerbach, A., ... Withford, M. J. (2009). Temperature and strain discriminating sensor based on the monitoring of cladding modes of a single femtosecond inscribed grating. In 20th International Conference on Optical Fibre Sensors (Vol. Part One). [750336] (Proceedings of SPIE; Vol. 7503). Washington, USA: SPIE. https://doi.org/10.1117/12.835094