Abstract： High-power semiconductor lasers， as core pumping sources for solid-state and fiber laser systems， are of sig• nificant application value in the fields such as industrial processing and national defense.This paper reports on a pump la• ser developed to meet the requirements of mid-infrared fiber laser systems.As a pump source for fiber lasers， the device must possess high output power and high efficiency.By optimizing quantum well materials， waveguide structures， and doping profiles， a single-emitter laser with a 200 μm stripe width was fabricated， achieving an output power of 16. 12 W and a maximum conversion efficiency of 53%.Through beam combining and coupling modules， the laser was coupled into a 105 μm optical fiber with a numerical aperture (NA) of 0. 18， delivering a maximum output power of 113 W. Test re• sults indicate that the laser exhibits excellent power and temperature stability， thereby enhancing its reliability. Keywords： semiconductor laser； high power； conversion efficiency； reliability
Gaohui et al. (Thu,) studied this question.