Fiber nonlinearities can significantly limit the performance of WDM optical systems. Crosstalk due to Stimulated Raman Scattering (SRS) can potentially reduce carrier-to-interference ratios to unacceptable levels. The effects of SRS include crosstalk that may produce interference at levels up to 30dB below desired carriers. The reverse path is particularly susceptible to this impairment.
This paper presents theoretical models for SRS. Empirical and simulation data is presented showing impairments from SRS in fiber links. Management of the factors that contribute to SRS is a critical part of system design. Specific techniques are described that will ensure that acceptable levels of system performance are obtained.