Abstract
We investigate the converted optical signal-to-noise ratio, intersymbol interference, and bit-error-rate performance of all-optical wavelength converter based on four-wave mixing in semiconductor optical amplifiers as functions of the input pump and signal powers. The minimum power penalty less than 1 dB is achieved by optimizing the input signal and pump power. In addition, two approaches to expand the dynamic range of input signal power have been presented with the resulting dynamic ranges of more than 25 and 12 dB respectively and both show good tolerance to variations in input signal power.
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