Protection switch optical communications system

Details Protection switch optical communications system Protection switch optical communications system

1997-11-03

2000-05-02

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359124, 359128, H04B 1008, H04J 1402

Patent

active

06057948&

ABSTRACT:
An optical communication system which includes a working communication line for carrying a wavelength division multiplexed signal having N channels and a protection line for carrying the multiplexed signal when the working line is out of service. Optical switches are cascadedly connected along the working and protection lines for providing a reliable and redundant switching configuration while producing less combined crosstalk levels as compared with a single switch configuration.

REFERENCES:
patent: 5069521 (1991-12-01), Hardwick
patent: 5091796 (1992-02-01), Nishimura et al.
patent: 5434691 (1995-07-01), Yamane
patent: 5457555 (1995-10-01), Moriyama
patent: 5510917 (1996-04-01), Corke et al.
patent: 5559622 (1996-09-01), Huber et al.
patent: 5870212 (1999-02-01), Nathan et al.
Tumolillo, T. A., et al., "Solid State Optical Space Switches For Network Cross-Connect And Protection Applications", IEEE Communications Magazine, vol. 35, No. 2, pp. 124-130, Feb. 1997.
PCT Notification of Transmittal of The International Search Report or the Declaration dated Mar. 17, 1999.

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