Improvement of beam quality of high-power edge-emitting lasers using inhomogeneous waveguides.

Inhomogeneous waveguides with corrugations have the potential to increase the fundamental mode brightness of edge-emitting lasers as compared to straight waveguides. The corrugations partly suppress the high-order lateral modes of the lasers. The impact of the shape and size of rectangular and triangular types of corrugations on the lasing performance is compared for the first time, and an optimized design is presented.

Astigmatism-free high-brightness 1060 nm edge-emitting lasers with narrow circular beam profile.

1060 nm high-brightness vertical broad-area edge-emitting lasers providing anastigmatic high optical power into a narrow circular beam profile are demonstrated. Ridge-waveguide (RW) lasers yield record 2.2 W single-transverse mode power in the 1060-nm wavelength range under continuous-wave (cw) operation at room temperature with excellent beam quality factor M ≤ 2.