The exploitation of thin film coatings for fibre sensors for the application of chemical sensing

Thomas D.P. Allsop*, Ron Neal, Kyriacos Kalli, Edward M. Davies, Saeed Rehman, Robert R.J. Maier, James Barton, Julian D. Jones, David J. Webb, Ian Bennion

*Corresponding author for this work

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

Abstract

We report on the use of thin film coatings, both single and multi-layered, deposited on the flat side of a lapped, D-shaped fibre to enhance the sensitivity of two kinds of surface plasmon resonance based optical fibre sensors. The first kind involves the use of a tilted Bragg grating inscribed within the fibre core, prior to fibre coating, while the second relies on a surface relief grating photoinscribed after the fibre has been coated. Some of the devices operate in air with high coupling efficiency in excess of 40dB and an estimated index sensitivity of ΔλΔn = 90nm from 1 to 1.15 index range showing potential for gas sensing. Other sensors produced index sensitivities (ΔλΔn) ranging from 6790nm to 12500nm in the aqueous index regime. The materials used for these fibre optical devices are germanium, silica, silver, gold and palladium.

Original languageEnglish
Title of host publicationPhotonics in the Transportation Industry: Auto to Aerospace II
EditorsAlex A. Kazemi, Bernard C. Kress
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages11
ISBN (Print)978-0-8194-7580-0
DOIs
Publication statusPublished - 13 Apr 2009
EventPhotonics in the Transportation Industry: Auto to Aerospace II - Orlando, FL, United States
Duration: 13 Apr 200914 Apr 2009

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume7314
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045

Conference

ConferencePhotonics in the Transportation Industry: Auto to Aerospace II
CountryUnited States
CityOrlando, FL
Period13/04/0914/04/09

    Fingerprint

Bibliographical note

T. Allsop; R. Neal; K. Kalli; E. M. Davies; S. Rehman; R. R. J. Maier; J. Barton; J. D. Jones; D. J. Webb and I. Bennion; "The exploitation of thin film coatings for fibre sensors for the application of chemical sensing", Proc. SPIE 7314, Photonics in the Transportation Industry: Auto to Aerospace II, 73140F (April 29, 2009).

Copyright 2009 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/10.1117/12.821112

Keywords

  • index sensing
  • coatings
  • gratings
  • surface plasmon resonances

Cite this

Allsop, T. D. P., Neal, R., Kalli, K., Davies, E. M., Rehman, S., Maier, R. R. J., Barton, J., Jones, J. D., Webb, D. J., & Bennion, I. (2009). The exploitation of thin film coatings for fibre sensors for the application of chemical sensing. In A. A. Kazemi, & B. C. Kress (Eds.), Photonics in the Transportation Industry: Auto to Aerospace II [731407] (SPIE Proceedings; Vol. 7314). SPIE. https://doi.org/10.1117/12.821112