The dynamic properties of GaAs/AlGaAs graded index separate confinement heterostructure single quantum well lasers have been investigated. The sublinear gain-carrier density relation imposes bandwidth limitations on these lasers. However, a considerable increase in the resonance frequency (∼55% for a quantum well width of 140 Å) was observed for lasers with cavities shorter than a certain cavity length. This discontinuous increase in bandwidth with decreasing cavity length coincides with the transition from first to second quantized state lasing and the associated recovery of the differential gain.
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Larsson et al. (1989) studied this question.
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