In-phase XGM wavelength conversion in semiconductor optical amplifier

Summary form only given. The XGM wavelength conversions reported before are all based on gain saturation effect in which the phase of the converted signal is inverted to the input signal, that will increase the complexity in signal processing and the system cost. Furthermore, due to the inverting operation of the converter, the converted pulses are blue shifted on the leading edge while red shifted on the trailing edge. This leads to a pronounced pulse broadening when transmitted over standard nondispersion shifted fiber. In-phase wavelength conversion based on cross-gain modulation (XGM) in SOA, to our knowledge, is the first time to be demonstrated by adjusting structure parameters and selecting appropriate bias current of the SOA.