HERMITE-GAUSSIAN MODE PATTERNS IN GaAs JUNCTION LASERS

Abstract

Far-field radiation patterns with Hermite-Gaussian symmetry in the junction plane have been observed in both p+nn+ and p+n+ GaAs lasers specially constructed with a stripe geometry contact. The Hermite-Gaussian symmetry implies the presence of a lens-like medium between the cleavage plane mirrors. Compared with conventional junction lasers, improved mode control is obtained.