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Laser operation utilizing distributed feedback (DFB) in single heterojunction (SH) GaAs/GaAlAs diodes is reported. Laser wavelengths ranging from 8430 to 8560 Å were observed in various samples depending on grating period. The threshold current densities required were comparable to those of normal SH diodes.
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Scifres et al. (1974) studied this question.
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