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:
Jan. 22, 2008
Filed:
Jun. 20, 2005
David Philip Williams, Bath, GB;
Timothy Adam Birks, Bath, GB;
Philip St. John Russell, Bath, GB;
Peter John Roberts, Bath, GB;
Hendrik Sabert, Stelle, DE;
Alexander Onischenko, Surrey, GB;
David Philip Williams, Bath, GB;
Timothy Adam Birks, Bath, GB;
Philip St. John Russell, Bath, GB;
Peter John Roberts, Bath, GB;
Hendrik Sabert, Stelle, DE;
Alexander Onischenko, Surrey, GB;
Crystal Fibre A/S, Birkerod, DK;
Abstract
An elongate waveguide for guiding light includes a core having an elongate region of relatively low refractive index; a microstructured region around the core having elongate regions of relatively low refractive index interspersed with elongate regions of relatively high refractive index; and a boundary at the interface between the core and the microstructured region, the boundary including in the transverse cross-section, a region of relatively high refractive index, which is connected to the microstructured region at a plurality of nodes, at least one relatively enlarged region around the boundary (and excluding a boundary having twelve nodes and six enlarged regions substantially at a mid-point between six pairs of relatively more-widely-spaced apart neighboring nodes).