  Optical and electrical characteristics of AlGaAs lasers with separate
confinement heterostructures are modeled by using Synopsys's Sentaurus TCAD and
open source software for semi-automatic data analysis of large collections of
data. The effects of doping in all laser layers are investigated with the aim
to achieve optimal characteristics of the devise. The results are compared with
these obtained for real lasers produced at Polyus research institute in Moscow,
showing that a significant improvement can be achieved, in particular an
increase in optical efficiency (up to over 70 %) by careful control of type and
level of doping through out the entire structure.
