Optical routing apparatus and method

Details Optical routing apparatus and method Optical routing apparatus and method

2007-12-18

2007-12-18

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Plural

C385S016000, C385S020000

Reexamination Certificate

active

11019717

ABSTRACT:
An apparatus and method for routing optical signals in which at least one demultiplexer receives and demultiplexes an incoming wavelength-division-multiplexed optical signal into n individual channels. At least two multiplexers are used for assembling respective multiplexed output signals and are connected by an array of semiconductor optical amplifiers (SOAs), each channel having correspondingly at least two SOAs connecting it respectively to each of the multiplexers. The SOAs are operated in a co-ordinated switching mode to route the corresponding channel selectively to at least one of the multiplexers, and may also contribute gain. A proportionate signal may be split off from each channel and taken to a photodetector to enable the gain of the associated SOAs to be adjusted to equalize or otherwise balance the signal levels.

REFERENCES:
patent: 6771905 (2004-08-01), Bortz
patent: 2001/0030787 (2001-10-01), Tajima
patent: 2004/0071160 (2004-04-01), Park et al.
patent: 2005/0163430 (2005-07-01), Noirie et al.

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