Narrow linewidth laterally coupled 155 μm AlGaInAs/InP distributed feedback lasers integrated with a curved tapered semiconductor optical amplifier

Abstract

We present a laterally coupled 1.55 μm AlGaInAs/InP distributed feedback laser monolithically integrated with a curved tapered optical amplifier, providing an output power of 210 mW with single transverse and longitudinal mode operation exhibiting a record low linewidth of 64 kHz.