Nonlinear tolerant optical modulation formats at high spectral efficiency

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United States of America Patent

PATENT NO 9749058
SERIAL NO

14744395

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Abstract

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Techniques for transmitting a data signal through an optical communications system. An encoder is configured to encode the data signal to generate symbols to be modulated onto an optical carrier. Each symbol encodes multiple bits of data and includes a first portion selected from a first constellation and a second portion selected from a second constellation. The first and second constellations have respective different average amplitudes. Each of the first and second constellations have a cardinality of at least two and the cardinality of the first constellation is greater than the cardinality of the second constellation. A modulator is configured to modulate a first frame of the optical signal using the first portion and modulate a second frame of the optical signal using the second portion. A selection of one frame of the optical signal to be used as the first frame encodes at least 1 bit of data.

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Patent Owner(s)

  • CIENA CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
O'Sullivan, Maurice Ottawa, CA 50 858
Oveis, Gharan Shahab Nepean, CA 61 496
Reimer, Michael Andrew Stittsville, CA 23 326
Shiner, Andrew D Ottawa, CA 31 224

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