It is the object of the present invention to optimize the degradation due to the four-wave mixing of wavelength multiplexed signals and the distortion due to the chromatic dispersion, thereby to provide a wavelength division multiplexed optical fiber transmission equipment having good transmission characteristics....http://www.google.fr/patents/US5559910?utm_source=gb-gplus-shareBrevet US5559910 - Wavelength division multiplexed optical fiber transmission equiptment
