Dispersion compensating optical fiber, dispersion compensating device, optical transmission line and optical transmission system
AssigneeSumitomo Electric Industries, Ltd.
InventorsMasao Tsukitani, Eisuke Sasaoka, Eiji Yanada, Yuichi Ohga
Life of this patent
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Abstract
A dispersion compensating optical fiber comprises a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band. The actual loss value is measured in a state that the fiber is looped around a bobbin. The minimum wavelength falls within a range of 1,565 to 1,700 nm. This dispersion compensating optical fiber is suitably used for an optical transmission line of a large-capacity high-speed WDM optical transmission system.
Claims15
A dispersion compensating optical fiber comprising:
- a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band,
- wherein said actual loss value is measured in a state that the fiber is looped around a bobbin, and
- wherein said minimum wavelength falls within a range of 1,565 to 1,700 nm.
A dispersion compensating optical fiber comprising:
- a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band,
- wherein said actual loss value is measured in a state that the fiber is comprised in an optical module, and
- wherein said minimum wavelength falls within a range of 1,565 to 1,700 nm.
A dispersion compensating optical fiber comprising:
- a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band,
- wherein said actual loss value is measured in a state that the fiber is comprised in an optical cable, and
- wherein said minimum wavelength falls within a range of 1,565 to 1,700 nm.
A dispersion compensating optical fiber comprising:
- relative dispersion slope of 0.0023 to 0.0043 mm−1 at a wavelength of 1,550 nm;
- and
- a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band,
- wherein said minimum wavelength falls within a range of 1,565 to 1,700 nm.
A dispersion compensating optical fiber comprising:
- relative dispersion slope of not less than 0.006 nm−1 at a wavelength of 1,550 nm;
- and
- a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band,
- wherein said minimum wavelength falls within a range of 1,565 to 1,700 nm.
9 A dispersion compensating device comprising:
- a plurality of optical fibers, said fibers being optically connected;
- wherein at least one of said fibers is a dispersion compensating optical fiber;
- and
- wherein a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band falls within a range of 1,565 to 1,700 nm.
A device according to claim 9, wherein relative dispersion slope at a wavelength of 1,550 nm is not less than 0.006 nm−1.
A device according to claim 9, wherein said actual loss value is measured in a state that the device is comprised in an optical module.
An optical transmission line formed by optically connecting:
- a single-mode optical fiber having positive dispersion and positive dispersion slope at a wavelength of 1,550 nm;
- and
- said dispersion compensating device according to claim 9.
Dependencies are inferred from the claim text.