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:
Jul. 01, 2003
Filed:
Jun. 30, 2000
Torsten Augustsson, Upplands Väsby, SE;
Telefonaktiebolaget LM Ericsson (Publ), Stockholm, SE;
Abstract
The present invention relates to a device and a method for wavelength selective filtration of optical wavelength channels. The wavelength selective filter ( ) includes one or more wavelength selective add-drop elements ( and ) and one or more on-off switches ( and ), wherein a first and a second side of the wavelength selective add-drop elements ( and ) includes an input and an output, wherein said on-off switches ( and ) are disposed between said input and output on the second side of the wavelength-selective add-drop elements ( and ), and wherein in the event of more than one wavelength selective add-drop element said elements are interconnected by means of a connecting waveguide between respective outputs and inputs on the first side of respective wavelength selective add-drop elements.