Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system

摘要

An optical wavelength multiplex transmission method uses a band around a zero dispersion wavelength of an optical fiber to compensate for waveform degradation, which is produced by a synergetic effect of self phase modulation and chromatic dispersion, to increase transmission distance and transmission rate in optical systems. The optical dispersion compensation method is performed in an optical system including a transmitter, a repeater and a receiver, which collectively transmit and receive optical information along the optical fiber. Light is transmitted within a transmissible band which is defined by an allowable dispersion value determined from a synergetic effect of self phase modulation and group velocity dispersion in the optical fiber. The transmissible band is set on a shorter wavelength side than a shorter wavelength end lambda theta - DELTA lambda theta or on a longer wavelength side than a longer wavelength end lambda theta + DELTA lambda theta of the zero-dispersion wavelength deviation range of the optical fiber. The zero dispersion wavelength DELTA theta of the optical fiber is shifted to apparently arrange the signal light into the transmissible band to compensate for the dispersion amount of the optical transmission system.