Fiber optic cable and optical transmission system

摘要

A fiber optic cable is provided which can perform a long-distance signal light transmission at high bit rates even if any temporal temperature change or regional temperature difference occurs. Also provided is an optical transmission system in which signal light can be transmitted at high bit rates over a long distance, from a transmitting station to a receiving station, even if a temporal temperature change or a regional temperature difference occurs to the fiber optic cables installed between the transmitting station and the receiving station. The fiber optic cable comprises a plurality of optical fibers bundled therein having an absolute value of 0.001 ps.nm-1.km31 1.K-1 or less, more preferably 0.0005 ps.nm-1.km-1.K-1 or less, of chromatic dispersion variation quantity per unit temperature at a wavelength of 1550 nm. The fiber optic cable preferably has a loose tubal structure or loose slotted structure.