青色半導体レーザーの現状と課題

抄録

GaN-based blue laser diodes (LDs) are expected to be adopted to the light sources for full color laser display systems. In this paper, the status of blue LDs development is reviewed, and new high-power blue LDs on c-plane GaN substrate, which were recently fabricated, are disclosed. The typical optical output power, voltage and wall-plug efficiency at an operating current of 2.3 A, for these LDs, were 3.75 W, 4.24 V, and 38.5%, respectively. The lifetime estimated from 50 ℃ aging test was over 30,000 hours.