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. 29, 2003
Filed:
Jun. 30, 2000
Torsten Augustsson, Upplands Väsby, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
The present invention relates to a device for wavelength selective phase control of a signal at a predetermined wavelength in a wavelength multiplexed optical signal, which comprises an input port for inputting the wavelength multiplexed optical signal, a splitting means for splitting the input wavelength multiplexed optical signal into the signal at the predetermiend wavelength and a signal comprising of substantially the remaining wavelengths in the multiplex, a phase control element for phase control of one of the two splitted signals, a combining device for combining the splitted phase-controlled signal and the other splitted signal in order to achieve a wavelength multiplexed wavelength selectively phase-controlled optical signal, and an output port for outputting the wavelength multiplexed wavelength selectively phase-controlled optical signal. A switch comprising at least one device of said kind and a method for wavelength selective phase control are likewise comprised in the present invention.