Publication No: 551

Optoelectrochemical transduction on planar optical waveguides

C.Piraud, E.K.Mwarania, J.Yao^#, K.O.Dwyer*, D.J.Schiffrin*, & J.S.Wilkinson

Optoelectronics Research Centre, The University of Southampton, UK
* Department of Chemistry, The University of Liverpool, PO Box 147, Liverpool, L69 3BX, UK
# Now with the Department of Electronic & Electrical Engineering, King's College London, The Strand, London. WC2R 2LS, UK.

Abstract

Planar optical waveguides overlaid with electrochemically-modulated sensing films comprise a powerful new class of chemical transducer. In this paper, the effects upon the modal absorption spectrum of depositing a highly absorbing electrochromic film on an optical waveguide are modelled. Theoretical and experimental results are given for such a device consisting of a lutetium biphthalocyanine film deposited on an indium tin oxide-coated potassium ion-exchanged glass waveguide, for application as a chlorine sensor.

IEEE Journal of Lightwave Technology (1992) Vol.10(5) pp.693-699

doi: 10.1109/50.136106

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