Tunable, multi-port optical add-drop multiplexer

Details Tunable, multi-port optical add-drop multiplexer Tunable, multi-port optical add-drop multiplexer

2005-09-27

2005-09-27

Phan, Hanh (Department: 2633)

Optical communications

Multiplex

Wavelength division or frequency division

C398S079000, C398S082000, C398S084000, C398S045000, C385S024000, C385S037000

Reexamination Certificate

active

06950609

ABSTRACT:
A tunable (reconfigurable) OADM provides multiple drop ports and multiple add ports by which desired channels can be removed from, or added to, a composite optical signal. In one embodiment, a programmable demultiplexer is arranged to receive an input signal containing components at x different wavelengths from an optical input port, and distribute the input signal components among K output ports. K−1 of the output ports are the “drop” ports of the OADM, and cumulatively contain w different wavelengths. The remaining port, which is the “through port” that carries the z wavelengths not dropped from the original input signal, is connected to the first port of an M port programmable multiplexer having M−1 other input ports. The remaining M−1 ports are the “add” ports of the OADM, which cumulatively receive v different wavelengths to be added by the OADM.

REFERENCES:
patent: 5960133 (1999-09-01), Tomlinson
patent: 6243179 (2001-06-01), Thompson et al.
patent: 6493117 (2002-12-01), Milton et al.
patent: 6657770 (2003-12-01), Marom et al.

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