All-optical clock recovery using parallel ridge-width varied DFB lasers integrated with Y-branch waveguide coupler

A novel device with two parallel ridge-width varied distributed feedback (DFB) lasers integrated monolithically with Y-branch waveguide coupler was fabricated by means of butt-joint regrowth. A 22 GHz self-pulsation tuning range has been achieved by adjusting independently the driving currents of the two DFB lasers sections. 38.4 GHz all-optical clock recovery has been demonstrated for the first time using this device.