GaInAsP/AlGaAs distributed feedback (DFB) lasers emitting at 660 nm were fabricated by liquid phase epitaxy for the first time. DFB mode oscillation in a single longitudinal mode was observed in the temperature range from 22°C to −24°c and in the current range up to 1.25 times the threshold (here, the output power was 5 mW). The temperature dependence of lasing wavelength was as small as 0.04 nm/deg.
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Chong et al. (1988) studied this question.
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