High power CW (16 W) and pulse (145 W) laser diodes based on quantum well heterostructures

We suggested and experimentally confirmed the effective method of internal optical loss reduction by high order mode suppression in a separate confinement quantum well laser heterostructure with asymmetric ultra thick waveguide. Manufacturing of InGaAs/GaAs/AlGaAs laser heterostructure with a 1.7 μm-thick asymmetric waveguide allowed attaining super low value of internal optical loss αi = 0.34 cm−1 preserving high efficiency and fundamental transverse mode operation. Record-high 16 W continuous wave (CW) and 145 W pulse room temperature front facet output optical power and 74% wallplug efficiency were attained in 100-μm-aperture 1.06-μm-emitting laser diodes with 3 mm cavity length.