Compact single wavelength laser optical sub-assembly integrated with one-chip wavelength locker for short reach coherent communication

We present a 3.5 mm × 2.0 mm compact single wavelength laser optical sub-assembly with a Si photonics-based wavelength locker chip. The measurement results showed a good agreement with the designed spectrum and 8-GHz bandwidth of target slope > 0.027 GHz-1were successfully obtained.