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Proceedings Paper

Recent advances in mid-IR optical fibres for chemical and biological sensing in the 2-15um spectral range
Author(s): Animesh Jha; Xin Jiang; Joris Lousteau; Billy Richards; Hongxia Li; William N. MacPherson; Henry T. Bookey; James S. Barton; Ajoy Kar; Yuen H. Tsang; David J. Binks
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Paper Abstract

The invited paper explains the transmission properties of a range of near-, mid-, and far-IR optical fibres for their applications in chemical and biological sensing. Methods for the fabrication of single and multiple-core mid-IR fibres are discussed in view of controlling the thermal and viscosity properties for fibre drawing. In particular, the need for removing impurity bands in the 5000 to 1000 cm-1 range is explained. The importance of engineering multi-core fibres is also discussed for simultaneous measurements of Raman, IR and surface plasmon enhanced modes together with say, temperature using a mid-IR transmitting tellurite fibre e.g. in a chemical process. The paper explains the principles and advantages of evanescent wave coupling of light at the resonant frequency bands for chemical sensing using a fibre evanescent wave spectroscopic sensor having a GeTeSe chalcogenide fibre. Using fibre based techniques, measurements for Cr6+ ions in solution and As3+ and As5+ in solids have been characterized at visible and mid-IR regions, respectively. In this paper we also explain the importance of using mid-IR fibres for engineering novel laser and broadband sources for chemical sensing.

Paper Details

Date Published: 4 August 2009
PDF: 11 pages
Proc. SPIE 7386, Photonics North 2009, 73860V (4 August 2009); doi: 10.1117/12.840477
Show Author Affiliations
Animesh Jha, Univ. of Leeds (United Kingdom)
Xin Jiang, Univ. of Leeds (United Kingdom)
Joris Lousteau, Univ. of Leeds (United Kingdom)
Billy Richards, Univ. of Leeds (United Kingdom)
Hongxia Li, Heriot-Watt Univ. (United Kingdom)
William N. MacPherson, Heriot-Watt Univ. (United Kingdom)
Henry T. Bookey, Heriot-Watt Univ. (United Kingdom)
James S. Barton, Heriot-Watt Univ. (United Kingdom)
Ajoy Kar, Heriot-Watt Univ. (United Kingdom)
Yuen H. Tsang, Univ. of Manchester (United Kingdom)
David J. Binks, Univ. of Manchester (United Kingdom)

Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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