Optical cross-connect device and optical network

Details Optical cross-connect device and optical network Optical cross-connect device and optical network

2005-01-11

2005-01-11

Stcyr, Daniel (Department: 2876)

Optical waveguides

With optical coupler

Switch

C398S050000

Reexamination Certificate

active

06842554

ABSTRACT:
In an optical cross-connect device for constructing a large scale optical network that supports an increase in the number of wavelengths, and an optical network using this optical cross-connect device, the optical cross-connect device comprises: a combination of any two of “a” units of wave multiplexers for multiplexing “n” waves of light signals directly received from an intra-office device to be transferred to a same destination, “L−a” threads of transmission lines each for transmitting an n-wave-multiplexed light signal, and “a” units of wave demultiplexers for demultiplexing the n-wave-multiplexed light signals bound for the same destination; and an L*L light switch for selecting the combination for transmitting the light signals to the same destination. Furthermore, a protective transmission line is provided, and a protective-signal light switch for selecting a combination of the protective transmission line, the wave multiplexer, and the wave demultiplexer is provided.

REFERENCES:
patent: 6512612 (2003-01-01), Fatehi et al.
patent: 6519060 (2003-02-01), Liu
patent: 6522803 (2003-02-01), Nakajima et al.
patent: 6594412 (2003-07-01), Maeda et al.
patent: 6741811 (2004-05-01), Nishi et al.
patent: 6748174 (2004-06-01), Milton et al.
patent: 9-51560 (1997-02-01), None

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