Patent ID: 6606437
Filing Date: 2003-08-12
Classification: G02B,H04B

Abstract:
An optical transmission line comprising:a positive dispersion optical fiber having a positive dispersion and a positive dispersion slope in a predetermined wavelength band within a wavelength band of 1570 to 1620 nm (L-band); and a negative dispersion optical fiber having a negative dispersion and a negative dispersion slope in said predetermined wavelength band within the L-band, and having a transmission loss of 0.27 dB/km or less in the L-band, a polarization mode dispersion of 0.15 ps/kmÂ½ or less, a mode field diameter of 5.5 &mgr;m or more, and a bending loss that enables the negative dispersion optical fiber to be formed as a cable suitable for use as part of said transmission line, wherein the dispersion value in said predetermined wavelength band falls within a range of âˆ’1 to 1 ps/nm/km in the entire optical transmission line comprising said positive dispersion optical fiber and said negative dispersion optical fiber.