All-optical demultiplexing using ultrafast four-wave-mixing in a semiconductor laser amplifier at 20 Gbit/s

All-optical time division demultiplexing and simultaneous 1 THz frequency conversion is demonstrated at 20 Gbit/s using four-wave-mixing in a semiconductor laser amplifier. Successful demultiplexing of 40 Gbit/s polarization multiplexed data is also achieved by taking advantage of the polarization dependence of four-wave-mixing in the semiconductor medium. The technique has the potential for 100 Gbit/s demultiplexing and for integration into a compact monolithic receiver circuit on InP.