High power 793 nm diode lasers

satisfy the need of Thulium-doped fiber laser pump source,793 nm high-power semiconductor laser emit-ters and fiber-coupled module were developed. The laser epitaxy adopts the large asymmetric optical cavity waveguide structure to reduce the mode loss. The waveguide adopts aluminum free GaInP material which improves the facet dam-aged threshold combined with vacuum cleavage passivation process. Through the optimization of epitaxial structure and facet coating,the output power of the developed laser reaches 12 W@11A,passed the 300 h aging test of 8 W. Seven single emitters were space coupled to 100 mu m 0. 22 NA fiber modules. The output power of the model is 40 W@7A, and the electro-optical efficiency is 49. 5% @ 40 W.