We report an all-optical switch based on two-pump four-wave mixing
in fibers. The switched signal is not shifted in frequency in this scheme. For different
signal wavelengths, the pump wavelengths and powers can be optimized to achieve the
best performance. The principle of how to design the switch is discussed in detail. A high
extinction ratio of
is obtained when the pump parameters are optimized by a
genetic algorithm that exhibits good convergence property and high computing
efficiency. The effect of zero-dispersion wavelength fluctuations along the fiber on the
switch is analyzed.
© 2007 Optical Society of America
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