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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 22GHz self-pulsation tuning range has been achieved by adjusting independently the driving currents of the two DFB lasers sections. 38.4GHz all-optical clock recovery has been demonstrated for the first time...
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