InGaAsP/InP tapered active layer multiquantum welllaser with1.8 dB coupling loss to cleaved singlemode fibre

Abstract

Tapered active layer MQW BH lasers with spot sizes closely matched to cleaved fibre are reported. A record low coupling loss of 1.8 dB to 10 µm core cleaved singlemode fibre has been obtained for a device with an 800 µm long taper.