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. 17, 2001
Filed:
Jun. 09, 1998
Hervé Fevrier, Verrieres le Buisson, FR;
Luc Berthelon, Palaiseau, FR;
Christian Coeurjolly, Vitry sur Seine, FR;
Alain Noury, Massy, FR;
Philippe Perrier, Velizy Villacoublay, FR;
Stéphane Ruggeri, Cressely, FR;
Alcatel Cit, Paris, FR;
Abstract
An extract-and-insert optical wavelength division multiplexer includes a broadcaster (D,) for applying an incoming multiplex signal to N outputs, a combiner-diffuser (D,) for broadcasting the multiplex to be inserted (MI) on N outputs, a first set of N tunable filters (FIT, . . . , FNT) for selecting the carriers of the signals which are to be used for modulating the carriers of the outgoing multiplex (MS), a second set of N tunable filters (F,E, . . . , FNE) for selecting the carriers which are to constitute the extracted multiplex (MT), N wavelength converter devices (CL,, . . . , CLN) suitable for supplying N carriers of the outgoing multiplex (MS), and N two-input, two-output optical switches (SW,, . . . , SWN) enabling each output of the broadcasters (D,, D,) to be selectively connected to the input of a filter of the first set and/or to the input of a filter of the second set, and/or to transmit the carriers of the multiplex to be inserted (MI) to a filter of the first set and/or a filter of the second set. The multiplexer is particularly applicable to optical transmission networks implementing a synchronous digital hierarchy.