Observation of phase conservation in a pulse sequence at 10 Gb/s in a semiconductor optical amplifier wavelength converter by four-wave mixing

Phase conservation in a pulse sequence at 10 Gb/s in wavelength conversion by four-wave mixing in a semiconductor optical amplifier is experimentally demonstrated. Conversion of 10-Gb/s signals with a bit-error rate of <10/sup -9/ is demonstrated for wavelength downshifts of 12.5 nm.