Method and apparatus for signal routing in an optical network an

Details Method and apparatus for signal routing in an optical network an Method and apparatus for signal routing in an optical network an

1996-04-24

1999-07-06

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359123, 370353, 370354, H04S 1402

Patent

active

059204125

ABSTRACT:
A method and apparatus for optical signal routing in an optical network that includes one or more optical fibers to carry multiplexed signals. Each optical fiber may include a plurality of optical carriers with each optical carrier operating at a different wavelength. The optical network includes an optical network routing apparatus to receive the multiplexed signals from the optical fiber, to categorize the multiplexed signals as local signals or as non-local signals, to drop the local signals to a local switch, and to transmit the non-local signals to the optical fiber for further routing in the optical network. Advantageously, the transport of multiplexed signals on optical carriers of different wavelengths on a single optical fiber multiples by the number of optical carriers the bandwidth capacity of the optical fiber. Further, the optical network routing apparatus routes signals through the optical network, routes signals to a local switch associated with the optical network, and/or adds signals from the local switch to the optical network. The optical network routing apparatus includes an optical wavelength division demultiplexor to demultiplex multiplexed signals into signals based on wavelength. A type check categorizes the signals as local signals or as non-local signals. The type check transmits the local signals to a local switch based on signal type and/or wavelength. The type check also transmits the non-local signals to an optical wavelength division multiplexor, which multiplexes the non-local signals for further routing through the optical network.

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Lee and Kostas, "Virtual Path (VP)-Based SONET/ATM Ring Architecture", Broadband Aspects of ISDN, GTE Telephone Operations, Dec. 4, 1995.
IBM: 9729 Optical Wavelength Division Multiplexor: The Affordable Path to Optical Networking, 1996.
IBM 9729 Optical Wavelength Division Multiplexor: Operator's Manual, First Edition, Oct., 1995.

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