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:
Jun. 07, 2016
Filed:
Sep. 27, 2012
Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E. V., Munich, DE;
Friedrich-schiller-universitaet Jena, Jena, DE;
Christian Voigtlaender, Jena, DE;
Jens Ulrich Thomas, Jena, DE;
Robert Williams, Berowra, AU;
Stefan Nolte, Jena, DE;
Andreas Tuennermann, Weimar, DE;
Abstract
The invention relates to a mode filter for reducing higher-order modes, with an optical fiber (), which has a core () and a cladding () surrounding the latter, wherein the cladding () and core () have refractive indices that differ from one another. In order to develop an alternative to the prior art, the mode filter according to the invention is designed in such a manner that the fiber () has, in a transition region () between core () and cladding (), at least one local refractive index modification region () which is arranged in the radially outer region of the core () and extends into the region of the cladding ().