Tapered thickness waveguide InGaAsP/InP BH MQW lasers

Optical alignment in laser modules represents major cost barriers for subscriber systems. From the point of high volume production and low cost views, integration of the laser and the spot-size transformer is desirable. Recently we have demonstrated a narrow beam divergence tapered thickness MQW spot-size transformer integrated Fabry-Perot BH InGaAsP MQW lasers using a selective area growth technique. Our tapered thickness waveguide MQW spot-size transformer is fully compatible for the laser fabrication process so that an increase in the fabrication cost will be minimized. Here we introduce our structure and lasing performance.