Abstract: The present invention is directed to a universal channel dispersion compensating fiber (CDCF) for WDM channel compensation that provides essentially zero dispersion slope over the wide wavelength band used in state-of-the-art transmission systems. It allows compensation of a large number of channels using a single fiber design. The improved optical fiber of the invention exhibits a dispersion slope at 1550 nm: <0.02 ps/nm2-km, preferably <0.01 ps/nm2-km, and a maximum variation of dispersion per km over the S-, C-, and L- bands of preferably less than 2.0 ps. In a preferred embodiment, the index profile of these fibers comprises a simple three layer design, which includes an up-doped central core, surrounded by a down-doped trench region, further surrounded by an up-doped ring region.

Abstract: The specification describes a universal channel dispersion compensating fiber (CDCF) for WDM channel compensation that provides essentially zero dispersion slope over the wide wavelength band used in state-of-the-art transmission systems. It allows compensation of a large number of channels using a single fiber design. The improved optical fiber of the invention exhibits a dispersion slope at 1550 nm: <0.02 ps/nm2-km, preferably <0.01 ps/nm2-km, and a maximum variation of dispersion per km over the S-, C-, and L-bands of preferably less than 2.0 ps. In a preferred embodiment, the index profile of these fibers comprises a simple three layer design, i.e. an up-doped central core, surrounded by a down-doped trench region, further surrounded by an up-doped ring region.

Abstract: The present invention enables the usable bandwidth of an optical fiber transmission link to be increased. The transmission fiber of the link with a is coupled with a dispersion compensation fiber (DCF+) that has a positive dispersion and a dispersion slope such that the relative dispersion slope (RDS) of the DCF+ is lower than the RDS of the transmission fiber. Because the RDS of the DCF+ is lower than the RDS of the transmission fiber, the RDS of the combination of the transmission fiber and the DCF+ below the RDS of the transmission fiber. When the DCF+ is combined with a DCF having a negative dispersion (DCF−), the transmission link is dispersion compensated by DCF− and the usable bandwidth of the optical fiber transmission link is increased compared to the compensation of the transmission fiber by a single DCF−.

Abstract: The specification describes a universal channel dispersion compensating fiber (CDCF) for WDM channel compensation that provides essentially zero dispersion slope over the wide wavelength band used in state-of-the-art transmission systems. It allows compensation of a large number of channels using a single fiber design. The improved optical fiber of the invention exhibits a dispersion slope at 1550 nm: <0.02 ps/nm2-km, preferably <0.01 ps/nm2-km, and a maximum variation of dispersion per km over the S-, C-, and L-bands of preferably less than 2.0 Ps.

Abstract: The present invention enables the usable bandwidth of an optical fiber transmission link to be increased. The transmission fiber of the link with a is coupled with a dispersion compensation fiber (DCF+) that has a positive dispersion and a dispersion slope such that the relative dispersion slope (RDS) of the DCF+ is lower than the RDS of the transmission fiber. Because the RDS of the DCF+ is lower than the RDS of the transmission fiber, the RDS of the combination of the transmission fiber and the DCF+ below the RDS of the transmission fiber. When the DCF+ is combined with a DCF having a negative dispersion (DCF−), the transmission link is dispersion compensated by DCF− and the usable bandwidth of the optical fiber transmission link is increased compared to the compensation of the transmission fiber by a single DCF−.