Long-lived high-power GaAlAs DH laser diodes

Aging test at high-power operation has been done by using facet coated GaAlAs DH laser diodes. Median lifetimes at 70°C are 9000 h for 10 mW/facet operation, 4500 h for 15 mW/facet operation, and 2000 h for 20 mW/facet operation. It is found that the median lifetime decreases with the inverse square of the optical power.