Multi-channel fibre optic message transmission system with a filter to compensate for the wavelength dependence of the intercom behavior due to stimulated raman scattering

摘要

A significant part of signal-to-noise degradation in WDM optical fiber communications, due to Raman crosstalk, is found to be deterministic in nature. Shaping of amplifier output to offset depletion of high frequency channels improves signal capacity by an order of magnitude.