  Thermalization losses in Laser Power Converters for the first transmission
window occur due to the energy difference between 808 nm wavelength photons and
the GaAs bandgap energy which results in lower efficiency. In this work, we
analyze the potential of increasing the bandgap using AlGaAs to minimize the
energy difference. The optimum aluminum content is 7 % in both single and
triple junction converters reaching a maximum ideal efficiency of 71% at 1
W/cm2 and 77% at 50 W/cm2.
