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

Allsop, Thomas D.P., Neal, Ron, Kalli, Kyriacos, Davies, Edward M., Rehman, Saeed, Maier, Robert R.J., Barton, James, Jones, Julian D., Webb, David J. and Bennion, Ian (2009). The exploitation of thin film coatings for fibre sensors for the application of chemical sensing. IN: Photonics in the Transportation Industry: Auto to Aerospace II. Kazemi, Alex A. and Kress, Bernard C. (eds) SPIE Proceedings . Bellingham, WA (US): SPIE.

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.

Publication DOI: https://doi.org/10.1117/12.821112
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Additional Information: 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
Event Title: Photonics in the Transportation Industry: Auto to Aerospace II
Event Type: Other
Event Dates: 2009-04-13 - 2009-04-14
Uncontrolled Keywords: index sensing,coatings,gratings,surface plasmon resonances,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
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Related URLs: http://www.scopus.com/inward/record.url?scp=69949164194&partnerID=8YFLogxK (Scopus URL)
Published Date: 2009-04-13
Authors: Allsop, Thomas D.P.
Neal, Ron
Kalli, Kyriacos
Davies, Edward M.
Rehman, Saeed
Maier, Robert R.J.
Barton, James
Jones, Julian D.
Webb, David J. ( 0000-0002-5495-1296)
Bennion, Ian

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