Publication No: 1957

Indium oxide overlay gratings realised on glass waveguides using excimer laser ablation

S.Pissadakis, L.Reekie, M.N.Zervas, J.S.Wilkinson
Optoelectronics Research Centre, University of Southampton, UK

K.Moschovis, G.Kiriakidis
Foundation for Research and Technology-Hellas, I.E.S.L., Materials Group, P.O.Box 1527, Heraklion 71 1 10, Greece

Abstract

Relief gratings overlaid on optical waveguides may be used as high-extinction ratio wavelength filters with applications in integrated optics and optical communications. Cross-patterned, high contrast relief grating waveguide structures may potentially perform as 2-D photonic band gaps if properly designed and fabricated. A new waveguide grating design process which relies on a novel grating patterning method and new materials will be presented in this paper. This design consists of the combination of a potassium ion-exchanged singlemode channel waveguide with a high-index film (InO_x) overlaid on its upper surface [1]. The high-index overlayer is deposited over a part of the waveguide length. A relief grating is patterned on the InO_x layer using 248nm interferometric excimer laser ablation [2].

EXMATEC 2000 Crete Greece 21-24 May (2000)

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