Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2004-08-10
2009-11-03
Pascal, Leslie (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
Reexamination Certificate
active
07613397
ABSTRACT:
In the WDM optical transmission system, a high-slope dispersion compensator compensates wavelength dispersion produced in the optical transmission line. The high-slope dispersion compensator has a dispersion slope characteristic, by which a dispersion slope is substantially compensated over the wavelength bandwidth of the optical transmission line, and also a dispersion compensation characteristic, by which the residual dispersion produced after compensating the dispersion slope using the above dispersion slope characteristic becomes symmetrical with respect to a wavelength in the vicinity of the center of the wavelength bandwidth. To achieve the above compensation, a wavelength-multiplexed signal is divided into wavelength bandwidth groups, and the residual dispersion of the optical transmission line is compensated on a group-by-group basis for the wavelength bandwidth groups.
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Ishikawa George
Nakamura Kentaro
Ooi Hiroki
Fujitsu Limited
Pascal Leslie
Staas & Halsey , LLP
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