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Undesirable nonlinear ’’kinks’’ in light-output–vs–current characteristics of stripe geometry double-heterostructure (DH) injection lasers are significantly reduced by stabilizing the transverse modes along the junction plane. Built-in passive guiding mechanism is introduced by growing planar (AlGa)As/GaAs DH layers on a grooved GaAs substrate.
Aiki et al. (Wed,) studied this question.
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