University of Southampton

Andrew Simon Webb

David Neil Payne

Peter George Robin Smith

Corin Barry Edmund Gawith

Jayanta Kumar Sahu

Faisal Rafiq Mahamd Adikan

A method of producing a planar substrate having waveguide channels, which method comprises: (i) providing a tube () of a substrate material; (ii) depositing silica layers () on the inside of the tube (), the silica layers () being doped with a photosensitive material; (iii) drawing the tube () so that the cross-sectional size of the tube () is reduced; (iv) before or after the reducing of the cross-sectional size of the tube (), causing the tube () to collapse into a flat shape by applying a low pressure to the tube, whereby the deposited silica layers together form a photosensitive silica layer (); (v) cutting to required lengths the tube () which has been collapsed and reduced in cross-sectional size; and (vi) using laser writing to define waveguide channels in the cut lengths of the tube () and thereby to produce the planar substrate having the waveguide channels.

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Southampton, United Kingdom

Andrew Simon Webb