Genetic algorithm pulse shaping for optimum femtosecond propagation in optical fibers

We demonstrate, through simulation, an optimization method based on genetic algorithms applied to propagation of ultrashort (femtosecond) pulses in si ngle-mode optical fibers. The algorithm employs a feedback loop that acts o n a pulse shaper (spectral amplitude filter) in response to a fitness funct ion based on the output pulse. The system evolves toward an optimum filter configuration that, in contrast to unfiltered pulse propagation, when it is applied to shape the input pulse permits successful transmission of the pu lse without loss of intensity or pulse width. (C) 1999 Optical Society of A merica [S0740-3224(99)03311-1].