Optical communications – Transmitter and receiver system – Including optical waveguide
Reexamination Certificate
2008-05-29
2010-02-23
Tran, Dzung D (Department: 2613)
Optical communications
Transmitter and receiver system
Including optical waveguide
C398S136000, C398S158000
Reexamination Certificate
active
07668465
ABSTRACT:
An optical transmission system that alleviates waveform distortions due to nonlinear effects in fibers. A transmitter sends WDM signals to a receiver over a dispersion-managed optical transmission line with in-line optical repeaters. The transmission line is divided into a plurality of dispersion compensation intervals each composed of a main segment and a compensation segment. Chromatic dispersion is managed such that the dispersion compensation intervals have a non-zero net dispersion at every boundary point between them, or such that the number of zero-dispersion boundary points is reduced. The main segment is a series of repeater sections with negative dispersion, while the compensation segment is a single repeater section with positive dispersion. Non-uniform distribution of net chromatic dispersions over the transmission length is achieved by combining repeater section with different average dispersions, dispersion compensation intervals with different numbers of repeater sections, or repeater sections with different span lengths.
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Naito Takao
Tanaka Toshiki
Fujitsu Limited
Staas & Halsey , LLP
Tran Dzung D
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