Abstract
Laser diodes based on AlGaInAs/InP heterostructures with an ultra-narrow waveguide are developed. It is shown that the use of this waveguide in conjunction with profiled doping ensures a balance between internal optical losses and heat resistance. Laser diodes with a stripe contact 100 μm wide demonstrate at room temperature an output optical power exceeding 4 W in a continuous-wave mode and exceeding 20 W in a pulsed mode.
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