O-Band Quantum Dot Semiconductor Optical Amplifier Directly Grown on CMOS Compatible Si Substrate

We report the first demonstration of the O-band quantum dot semiconductor optical amplifier (QD-SOA) that is directly grown on CMOS compatible on-axis silicon substrate. The QD-SOA has a length of 3600 μm, tapered from 4 μm to 5.5 μm, which can offer 29 dB on-chip gain and 22.8 dBm saturation output power with a minimum 7 dB fiber to fiber noise figure.