We report a polarization-independent widely tunable four-wave mixing wavelength converter using polarization diversity and broad-band orthogonal pumps in a single semiconductor optical amplifier. The conversion efficiency is nearly constant (less than 3-dB variation) over a 36-nm range with less than 0.34 dB polarization sensitivity. The power penalty at 10/sup -9/ bit error rate for a 10-Gb/s signal is less than 0.9 dB.
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Mak et al. (2000) studied this question.
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