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We describe the characteristics of graded-index separate-confinement heterostructure (GRIN-SCH) quantum well laser structures for a wide range of quantum well thickness and graded layer composition. It was deduced that the ‘‘GRIN’’ region enhances carrier confinement and assists the thermalization of carriers into the quantum well. A maximum value of T0 of 190 K was measured for these single quantum well lasers.
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Hersee et al. (1984) studied this question.
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