Optical communication link

An optical communication link, comprising an optical transmission line composed of a positive dispersion fiber has a negative dispersion optical fiber having a positive dispersion value with a negative dispersion value, in a wavelength region to be used in: dispersion value of the positive dispersion fiber 5ps / / km nm or more and 15ps / nm / km or less; and DPS value of the positive dispersion fibers and negative dispersion fiber are 250nm or more, DPS value of wavelength dispersion values ​​of the respective fibers 1550nm divided by the dispersion slope the drawn.