High-speed optical modulation through the quantum well intermixing (QWI) semiconductor optical amplifier (SOA)-integration electroabsorption modulator (EAM)

Photonic integration of semiconductor optical amplifier (SOA) and electro-absorption modulator (EAM) has been reviewed. Using local quantum well intermixing (QWI), cascaded EAM/SOA waveguide structure with improved microwave design leads to low transmission loss of-7.5dB, >100Gb/s high-speed optical modulation, and optical amplification of 10dB gain.