Re-configurable optical add-drop multiplexer

Details Re-configurable optical add-drop multiplexer Re-configurable optical add-drop multiplexer

2006-11-14

2006-11-14

Tran, Dzung (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S084000, C398S087000

Reexamination Certificate

active

07136589

ABSTRACT:
A re-configurable optical add-drop multiplexer (OADM) (800) includes a first optical circulator (10), a second optical circulator (30), and a fiber Bragg grating (FBG) (20). The first optical circulator has a first circulator port (11), a second circulator port (12), and a third circulator port (13). The second optical circulator has the same structure as the first optical circulator. The FBG has a first state where it reflects an optical signal with a particular wavelength and passes all other wavelengths, and a second state where all the optical signals pass through it. The signal of the particular wavelength can thus be dropped from the optical signals by reflection of the FBG and output from the third circulator port of the first optical circulator, and a new signal of the same dropped wavelength can be added into the optical signals through a first circulator port (31) of the second optical circulator.

REFERENCES:
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patent: 2003/0091274 (2003-05-01), Vohra et al.
patent: 2004/0146240 (2004-07-01), Zhang et al.

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