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Self-aligned index-guided multiple quantum well laser by sulphur diffusion-induced disordering

Self-aligned index-guided multiple quantum well laser by sulphur diffusion-induced disordering

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A simple self-aligned fabrication process for sulphur-diffusion disordered AlGaAs/GaAs multiple quantum well (MQW) lasers is described that produces refractive index guiding. However, the gradual profile of sulphur diffusion causes a separation between the disordered/nondisordered interface and the pn junction which leads to a large lateral optical loss of the index-guided mode.

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