Patent ID: 6934479

Claim:
A wavelength division multiplexing optical communication system for transmitting wavelength division multiplexed signal light containing a plurality of optical signals of different wavelengths, from a transmitting terminal station to a receiving terminal station via an optical transmission path, wherein said receiving terminal station comprises reception characteristics measurement means for measuring reception information including optical signal to noise ratio and a transmission error rate for the optical signals of respective wavelengths transmitted through said optical transmission path, and reception information transmission means for transmitting the reception information about each wavelength measured by said reception characteristics measurement means to said transmitting terminal station, and said transmitting terminal station comprises pre-emphasis performing means for performing pre-emphasis on the wavelength division multiplexed signal light transmitted along said optical transmission path, chirp applying means for applying an optical wavelength chirp to the wavelength division multiplexed signal light transmitted along said optical transmission path, and control means for controlling said pre-emphasis performing means and said chirp applying means, depending on the reception information about each wavelength transmitted from said receiving terminal station, wherein a setting of said pre-emphasis in said pre-emphasis performing means is made by said control means after said control means controls a setting of an a parameter representing an amount of the optical wavelength chirp in said chirp applying means, in a repeating sequence, so that said control means thereby controls said pre-emphasis performing means and said chirp applying means together to optimize transmission error rate or signal to noise ratio of the wavelength division multiplexed signal light at the receiving terminal station.