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We present an overview of our theoretical and experimental work on a novel type of semiconductor lasers - quantum well (QW) lasers with asymmetric barrier layers (ABLs). Our experimental work supports our theoretical derivations — ABL QW lasers demonstrate superior operating characteristics as compared to conventional QW lasers. In particular, the threshold current is lower and more temperature-stable, the light-current characteristic is more linear, and the wall-plug efficiency is higher in ABL lasers.

Lasers with asymmetric barrier layers: A promising type of injection lasers