Optical add/drop multiplexer utilizing variable optical...

Details Optical add/drop multiplexer utilizing variable optical... Optical add/drop multiplexer utilizing variable optical...

2007-06-26

2007-06-26

Chan, Jason (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S084000, C398S085000

Reexamination Certificate

active

10294398

ABSTRACT:
A switchless optical add/drop module (OADM) includes: a first variable optical splitter (VOS) for splitting a composite optical signal including a plurality of channels into a first portion and a second portion; a first multi-channel variable optical attenuator (MCVOA) optically coupled to the first VOS, where the first MCVOA blocks dropped channels of the first portion, transmits express channels of the first portion, and balances power levels of each of the transmitted express channels of the first portion; a second VOS optically coupled to the first MCVOA opposite to the first VOS for combining the transmitted express channels of the first portion and added channels; and a second MCVOA optically coupled to the first VOS, where the second MCVOA blocks express channels of the second portion, transmits dropped channels of the second portion, and balances power levels of each of the transmitted dropped channels of the second portion.

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