The authors report the first demonstration of all-optical time divisio
n multiplexing (TDM) to wavelength division multiplexing (WDM) convers
ion based on four-wave mixing in a semiconductor optical amplifier. A
700 Mbit/s TDM bit stream at one wavelength has been converted to two
350 Mbit/s WDM bit streams at two wavelengths spaced by 4 nm. Observed
bit error rates are less than 10(-9).