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:
May. 12, 2009
Filed:
Nov. 02, 2007
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 including a core having an elongate region of relatively low refractive index; a microstructured region around the core comprising 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, and at least one relatively enlarged region around the boundary, the enlarged region having a major dimension and a minor dimension, wherein the length of the major dimension divided by the length of the minor dimension is more than 3.0.