Two-Wavelength Tunable Laser Diode using a Quantum Dot SOA and a Silicon Photonic External Cavity

We propose a tunable two-wavelength heterogeneous quantum dot laser diode. The tunable two-wavelength laser consists of a quantum dot semiconductor optical amplifier and an external cavity fabricated from silicon photonics technology as the two-wavelength tunable filter. We successfully demonstrated two-wavelength lasing oscillation by tuning the difference frequency from approximately 34 GHz to 400 GHz.