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. 27, 2003
Filed:
Nov. 02, 2000
Torsten Augustsson, Upplands Väsby, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A device for multiplexing a wavelength multiplexed optical signal ( ) comprising at least a first and a second optical wavelength channel centered around respective predetermined wavelengths (&lgr; , &lgr; ), comprising an MMI coupler ( ), at least of the size 2×2, for inputting the wavelength multiplexed optical signal at an input ( ) and for splitting the multiplexed signal into components and imaging these at several ports ( ), Michelson waveguides ( ) for receiving and transporting the components imaged at the port of the MMI coupler, reflecting means ( ) for reflecting the components received and transported in the Michelson waveguides back to the ports of the MMI coupler, wherein the MMI coupler is arranged for inputting the reflecting components, and the respective lengths of the Michelson waveguides are adapted so that said MMI coupler combines the components in a manner such that the first and the second optical wavelength channels are imaged substantially at separated outputs ( ).