The far-field radiation patterns of multiple quantum well lasers grown by metal-organic chemical vapour deposition (MO-CVD) with conducting stripe widths of 3, 5, 7 and 9 μm were studied. The results show that the existing antiguidance effect in conventional heterostructure GaAs/GaAlAs lasers is stronger in quantum well lasers due mainly to the thinner active regions.
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Halido et al. (1982) studied this question.