A novel scheme is proposed for wavelength conversion based on cross-gain mo
dulation (XGM) in a single-pore coupled semiconductor optical amplifier (SO
A), in which the input and output share one port. Experimental results and
theoretical analysis show that this scheme can be achieved with simple impl
ementation, high output extinction ratio and large input dynamic range. Bas
ed on this novel scheme, 2.5 Gbit/s wavelength up conversion with a 12.8 nm
span has been demonstrated with the output extinction ratio as high as 15
dB.