Patent ID: 7016614

Claim:
An optical wavelength division multiplexing transmission system comprising: a first optical fiber transmission path for a wavelength division multiplexed signal to be input therefrom, the first optical fiber transmission path having a first zero-dispersion wavelength, and the first wavelength division multiplexed signal having a first set of wavelengths; a second optical fiber transmission path having a second zero-dispersion wavelength different from the first zero-dispersion wavelength; and an optical repeater which receives the first wavelength division multiplexed signal from said first optical fiber transmission path, wavelength-converts the first wavelength division multiplexed signal with respect to respective wavelengths thereof so as to minimize SPM-GVD effect and FWM in the second optical fiber transmission path in accordance with the second zero-dispersion wavelength, and outputs a second wavelength division multiplexed signal having a second set of wavelengths to said second optical fiber transmission path wherein each of the wavelengths included in the second set of wavelengths is different from a corresponding wavelength included in the first set of wavelengths.