By far

the research about limited-range wavelength converter is concentrated on FWM (SOA (Semiconductor Optical Amplifier) in Four-Wave Mixing) wavelength converter which can convert the input wavelength to longer or shorter output wavelength

or on wavelength converter which has wraprounds capability.In this paper

the network performance which is influenced by XGM( SOA(Semiconductor Optical Amplifier) in Cross-Gain Modulation) wavelength converter which can only convert input wavelength to shorter output wavelength is studied.The research result shows that although the performance of network with XGM wavelength converter approximates to the performance of network with FWM wavelength converter which has 10-20% converting range capability

the performance improvement is significant and is not far away from the performance with all-range wavelength converter.