We have fabricated 1240nm GaInNAs high-power semi-conductor laser diodes. In pulsed operation 1000 mum x 100 mum laser diodes show record low threshold current densities of 174 Acm(-2). Continuous wave output powers exceeding 4.6 Watts at room temperature and 6.2 Watts at a heatsink temperature of -5 degrees C are obtained from 1300 mum x 200 mum devices. The maximum wallplug efficiency of the device exceeds 40 % and the internal quantum efficiency reaches 0.89. Preliminary lifetime tests were performed for about 1000 h and show stable high-power operation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.