AlGaAs/GaAs distributed feedback (DFB) lasers with a ridge waveguide structure emitting at 0.88 μm were fabricated by normal-pressure metalorganic chemical vapour deposition (MOCVD). The DFB lasers have a low threshold current around 55 mA at room temperature and can be operated stably in a single longitudinal mode up to 40°C.
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Hirata et al. (1986) studied this question.
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