A cluster expansion approach to modelling single-channel bit string propagation in optical fibers

摘要

A method for determining the nonlinear propagation of a wavetrain of non-return to zero (NRZ) pulses in an optical fiber is presented. The evolution of a bit string is calculated by propagating the fundamental pulses individually without interpulse effects and then systematically adding corrections due to two, three, and higher order interacting pulses. This approach can be used to reduce the computational time for propagating a long wavetrain or a set of many similar bit strings.