The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2012
Filed:
Sep. 18, 2007
Faisal Rafiq Mahamd Adikan, Taman Sri Delima, MY;
Andrew Simon Webb, Southampton, GB;
Corin Barry Edmund Gawith, Southampton, GB;
Peter George Robin Smith, Romsey, GB;
David Neil Payne, Southampton, GB;
Jayanta Kumar Sahu, Southampton, GB;
Faisal Rafiq Mahamd Adikan, Taman Sri Delima, MY;
Andrew Simon Webb, Southampton, GB;
Corin Barry Edmund Gawith, Southampton, GB;
Peter George Robin Smith, Romsey, GB;
David Neil Payne, Southampton, GB;
Jayanta Kumar Sahu, Southampton, GB;
University of Southampton, Southampton, GB;
Abstract
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.