Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2003-03-20
2008-03-04
Li, Shi K. (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
Reexamination Certificate
active
07340176
ABSTRACT:
An optical telecommunications network (1000), of metropolitan area type, having a ring type core (10), and secondary rings (41, 42; 43, 44). In each sending access node (11), transmitters (111) for sending information-carrying optical signals use a wavelength belonging to a group of wavelengths dedicated to the secondary ring (41, 42) to which this sending access node (11) is connected. In each destination access node (21), receivers (212) are capable of receiving all the wavelengths used by sending nodes (11) of the network. Communication nodes (1, 2) comprise all-optical devices (100, 101, 10; 201, 20) for inserting, into the core fiber (10), optical signals sent by a sending access node connected to the communication nodes. Optical couplers (31, 32), for taking from the core fiber (10) a so-called representative signal formed of a fraction of the power of each information-carrying signal, are respectively coupled to the receivers of the destination nodes.
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Artigue Claude
Dorgeuille Francois
Jourdan Amaury
Noirie Ludovic
ALCATEL
Li Shi K.
Sughrue & Mion, PLLC
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