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:
Mar. 14, 2000
Filed:
Oct. 23, 1997
Michel Sotom, Paris, FR;
Amaury Jourdan, Sevres, FR;
Guy Soulage, Seine, FR;
Franck Bruyere, Paris, FR;
Pierre Sansonetti, Palaiseau, FR;
Alcatel, Paris, FR;
Abstract
To perform selective dropping and adding of channels of wavelength multiplexes without interposing active elements in the main transmission path, the apparatus comprises add-and-drop modules, each of which includes at least one stop filter provided with two opposite ports. An optical switch provided with a drop outlet is provided with drop inlets and with add outlets associated with the modules, and respectively coupled to the opposite ports of the filters. For each module, the switch is organized for selectively coupling one of its drop inlets to one of its add outlets and/or to the drop outlet.