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:
Sep. 17, 2013
Filed:
Mar. 20, 2008
Method of fabricating waveguide devices which use evanescent coupling between waveguides and grooves
James Christopher Gates, Southampton, GB;
Corin Barry Edmund Gawith, Southampton, GB;
Peter George Robin Smith, Romsey, GB;
James Christopher Gates, Southampton, GB;
Corin Barry Edmund Gawith, Southampton, GB;
Peter George Robin Smith, Romsey, GB;
University of Southampton, Southampton, GB;
Abstract
An optical waveguide device () comprises a planar substrate with a lower cladding layer (), a core layer () and an upper cladding layer (), a groove () in the substrate that extends at least into the core layer (), and a waveguiding channel () in the core layer (), wherein at least a part of the waveguiding channel (), which may contain a Bragg grating, is sufficiently proximate to the groove () in the plane of the substrate for an evanescent field of light propagating in the waveguiding channel () to extend laterally into the groove (). Material contained in the groove modifies the properties of the waveguiding channel, so that a sample of material can be analysed or an active material can be used to modulate the propagating light. The groove () can be made before the waveguide (). The groove () can be made by cutting into the substrate with a saw and the waveguide () can be made by direct writing in the core layer () with an ultraviolet beam.