Abstract
Quantum well heterostructure (QWH) lasers have unique and desirable characteristics. A review of a variety of QWH lasers, including infrared and visible, single and multiple stripe devices, will be discussed. Emphasis will be on advances made in the last three years, including broad band tuning with an external grating, wavelength modification by annealing, and index-guiding by impurity-induced disordering.
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