Optical add/drop multiplexer

Details Optical add/drop multiplexer Optical add/drop multiplexer

2006-02-28

2006-02-28

Kang, Juliana (Department: 2874)

Optical waveguides

With optical coupler

Plural

C385S015000, C398S083000

Reexamination Certificate

active

07006723

ABSTRACT:
An optical add/drop multiplexer includes a multiplexing/demultiplexing unit having an input multiplexing port, an output multiplexing port and a plurality of demultiplexing ports each connected to a respective optical circulator. Each optical circulator includes a first port for internally inputting an added channel, a second port for outputting the added channel to a corresponding demultiplexing port and receiving a channel outputted by the corresponding demultiplexing port, and a third port for outputting the channel received from the second port. Each of optical switches is located between adjacent circulators, wherein each optical switch includes a first input port, coupled to the third port of one optical circulator, for receiving the channel from the third port, a second input port for receiving an externally added channel, a first output port, coupled to another first port of another optical circulator, for outputting the added channel to another first port, and a second output port for externally outputting the channel inputted through the first input port according to the dropping operation.

REFERENCES:
patent: 6243179 (2001-06-01), Thompson et al.
patent: 6266460 (2001-07-01), Doerr
patent: 6307656 (2001-10-01), Terahara

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