Apparatus for adding and dropping wavelength multiplex channels

Details Apparatus for adding and dropping wavelength multiplex channels Apparatus for adding and dropping wavelength multiplex channels

1997-10-23

2000-03-14

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359130, H04J 1402

Patent

active

060380454

ABSTRACT:
To perform selective dropping and adding of channels of wavelength multiplexes without interposing active elements in the main transmission path, the apparatus comprises add-and-drop modules, each of which includes at least one stop filter provided with two opposite ports. An optical switch provided with a drop outlet is provided with drop inlets and with add outlets associated with the modules, and respectively coupled to the opposite ports of the filters. For each module, the switch is organized for selectively coupling one of its drop inlets to one of its add outlets and/or to the drop outlet.

REFERENCES:
patent: 5612805 (1997-03-01), Fevrier et al.
patent: 5751456 (1998-05-01), Koonen
K. P. Jones et al, "Optical Wavelength Add-Drop Multiplexer in installed Submarine WDM Network", Electronics Letters, vol. 13, No. 24, Nov. 23 1995, pp. 2117-2118, XP000548194.
M. J. Chawki et al, "Evaluation of an Optical Boosted Add/Drop Multiplexer Obadm Including Circulators and Fiber Grating Filters", Proceedings of the 21st European Conference on Optical Communication, Sep. 17, 1995, Brussels, pp. 47-50, XP002032556.
Frowin Derr et al, "An Optical Infrastructure for Future Telecommunications Networks", IEEE COIEEE Communications Magazine, vol. 33, No. 11, Nov. 1995, pp. 84-88, XP000545290.
Milan Kovacevic et al, "Electronic Wavelength Translation in Optical Networks", Globecom '95, IEEE Global Telecommunications Conference, Singapore, Nov. 14-16, 1995, vol. 3 of 3, Nov. 14 1995, Institute of Electrical and Electronics Engineers, pp. 2182-2187.
K. Kitayama, "Subarrier Multiplexing Based Signaling and Access Control in Optical FDM Networks", Globecom '95, IEEE Global Telecommunications Conference, Singapore, Nov. 14-16, 1995, vol. 3 of 3, Nov. 14 1995, Institute of Electrical And Electronics Engineers, pp. 1996-2002.

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