The design of a high-power low-divergence low-astigmatism tapered-waveguide
laser array is described. A two-dimensional beam propagation model is used
for the first time to optimize a tapered-waveguide laser, which includes f
ull thermal and spatiotemporal. descriptions to allow detailed assessment o
f the major waveguiding effects on the output beam. This allows limits to t
he far-held performance to be addressed and compared with experimental data
.