Ultrafast all-optical wavelength conversion using 160 fs pulses in a multi-quantum-well SOA

We demonstrate wavelength conversion based on nonlinear polarization rotation driven by ultrafast carrier relaxation in an InGaAsP-InGaAs multi-quantumwell semiconductor optical amplifier. We used a continuous wave (CW) probe beam of 1555 nm, and a control pulse of duration of 160 fs at a center wavelength of 1520 nm. We studied wavelength conversion for different control pulse energies and obtained a conversion efficiency of 12 dB with pulse energies of 10 picojoule