M. A. Man'ko, B. I. Makhsudov, Pham Van Hoi

For planar stripe-geometry GaAlAs/GaAs heterostructure lasers, astigmatism, wavefronts and directivity diagrams of radiation are studied and their dependence on pumping current is investigated by means of a modified Michelson interferometer. Experimental data are compared with those calculated using a model with smooth variation of the complex dielectric permeability in the form of an Epstein layer.


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