The first current injection lasing action in AlGaInP/Ga0.65In0.35P het
erostructures grown on commercially available GaAs0.6P0.4 substrates i
s reported. At 77K, laser diodes exhibited threshold current densities
of 900A/cm(-2) with yellow stimulated emission near 6735 Angstrom. Th
is is the shortest current injection lasing wavelength ever achieved i
n a III-V compound semiconductor.