Optical network, optical division and insertion node and recover

Details Optical network, optical division and insertion node and recover Optical network, optical division and insertion node and recover

1997-10-15

2000-10-24

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359119, 359127, H04B 1008

Patent

active

061376035

ABSTRACT:
Disclosed is an optical network which has a plurality of optical division and insertion nodes and one or a plurality of hub (central) nodes which are circularly connected by using an optical transfer system where a clockwise or counterclockwise data transfer is conducted by using a plurality of optical fibers or an optical wavelength-multiplexing technique; wherein the hub (central) node and the plurality of division and insertion nodes individually use signal lights with wavelengths different from each other and are provided with a transmission system composed of two or more clockwise or counterclockwise independent paths, and the optical division and insertion node selects one of signals obtained from the two or more paths.

REFERENCES:
patent: 5717796 (1998-02-01), Clendening
patent: 5760934 (1998-06-01), Sutter et al.
patent: 5867289 (1999-02-01), Gerstel et al.
patent: 5903370 (1999-05-01), Johnson
patent: 5903371 (1999-05-01), Arecco et al.
Partial English translation of Japanese Office Action dated Sep. 14, 1999.
Proceedings of the 1994 IEICE Fall Conference, Sep. 26-29, 1994, Er-doped Fiber Amplifier for WDM Networks Using Automatic Gain Control.

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