System and method for managing system margin

Details System and method for managing system margin System and method for managing system margin

2007-03-27

2007-03-27

Chan, Jason (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S140000, C398S160000

Reexamination Certificate

active

10100591

ABSTRACT:
An optical communication system is operable to communicate a plurality of wavelength signals at a bit rate of at least 9.5 gigabits per second over a multiple span communication link spanning at least 400 kilometers without optical regenerators. The plurality of wavelength signals include a bandwidth of more than 32 nanometers separated into at least 160 optical channels. The system includes a plurality of optical transmitters implementing a forward error correction (FEC) coding technique. The FEC encoded wavelength signals comprise a bit error rate of 10−09or better after FEC decoding. The system also includes at least five (5) optical add/drop multiplexers (OADMs), each coupled to one or more spans of the multiple span communication link. The system further includes a plurality of amplifiers each coupled to one or more spans of the communication link, at least a majority of the amplifiers comprise a distributed Raman amplification stage.

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Ramaswami, Rajiv,

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