Optical transmission line, and optical fiber and dispersion compensating module employed in the same

摘要

The present invention relates to an optical transmission line and the like having a chromatic dispersion with a small absolute value as a whole within a signal wavelength band including S, C, and L bands. This optical transmission line comprises a single-mode optical fiber and a dispersion-compensating optical fiber which are connected to each other; and has, as characteristics of the whole optical transmission line at a wavelength of 1550 nm, a chromatic dispersion with an absolute value of 4 ps/nm/km or less, and a dispersion slope of -0.015 ps/nm2/km or more but less than 0 ps/nm2/km. Its chromatic dispersion has a maximum value within a wavelength range of 1450 to 1530 nm, and a minimum value within a wavelength range of 1570 to 1620 nm.