Long-distance optical transmission system , long-distance optical transmission method and long-haul optical sensing system

摘要

PROBLEM TO BE SOLVED: To provide an optical transmission system and an optical transmission method capable of performing long distance transmission by inexpensive configuration.;SOLUTION: A wavelength converter 4 for conversion from 1.3 μm band to 1.55 μm band is arranged on the transmitting side, a wavelength converter 5 for conversion from 1.55 μm band to 1.3 μm band is arranged on the receiving side, an existing optical fiber transmission path (single mode optical fiber (SMF)) 10 for 1.3 μm band laid between the wavelength converters is interposed and an optical pulse signal using wavelength of a 1.55 μm band with less transmission loss than that of a 1.3 μm band is transmitted as an optical pulse signal to be transmitted. Thus, the long distance transmission of the optical signal transmission becomes possible.;COPYRIGHT: (C)2009,JPO&INPIT