Wavelength-tunable QAM synthesis by direct modulation of injection-locked Fabry-Perot semiconductor lasers

A new scheme for direct and tunable (30nm shown here) QAM synthesis from binary RF data streams is demonstrated with up to 48Gbit/s QPSK, including propagation over 75km SMF-28. Preliminary 16QAM (60Gbit/s) results are shown.