WDM self-healing optical ring network

Details WDM self-healing optical ring network WDM self-healing optical ring network

2006-10-17

2006-10-17

Tran, Dzung (Department: 2613)

Optical communications

Fault recovery

Bypass inoperative element

C398S017000, C398S019000, C398S059000, C398S083000

Reexamination Certificate

active

07123830

ABSTRACT:
A WDM bidirectional self-healing optical ring network is provided in which an outer ring network and an inner ring network can both handle N optical signals. The network includes a node; an optical add/drop multiplexer having a 1×N demultiplexer and a 1×N multiplexer; a pair of optical switching devices each connected to an optical fiber link intervening between the optical add/drop multiplexer and another node on the both ends of the optical add/drop multiplexer; and, a pair of circulators each connected between the optical add/drop multiplexer and a particular optical switching device in the optical switching device pair, each circulator having three ports, two of the three ports being connected to a corresponding optical switching device and remaining one port being connected to the optical add/drop multiplexer.

REFERENCES:
patent: 6134036 (2000-10-01), Andreozzi et al.
patent: 6198721 (2001-03-01), Mueller
patent: 6577652 (2003-06-01), Kamata
patent: 6853811 (2005-02-01), Wahler et al.
patent: 6907201 (2005-06-01), Frankel

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