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:
Feb. 22, 2005
Filed:
Jun. 28, 2002
Richard Epworth, Hertfordshire, GB;
James Whiteaway, Hertfordshire, GB;
Seb J Savory, Cambridge, GB;
Richard Epworth, Hertfordshire, GB;
James Whiteaway, Hertfordshire, GB;
Seb J Savory, Cambridge, GB;
Nortel Networks Limited, St. Laurent, unknown;
Abstract
An optical couplercomprising at least three fibresand, portions of the fibres being fused to each other to form a coupling regionoperable to couple light therebetween. At least two of the fibres have inputsand/orand/orand at least two of the fibres have outputsand/orand/or. In use, on illumination of at least two of the inputs light intensity is emitted from a plurality of the outputs having a substantially asymmetric phase relationship, such as, for example, a quadrature phase relationship between two of the outputs. The invention also provides for methods of making such a device.