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Continous wave operation of interband cascade lasers based on type-II InAs/Ga(In)Sb heterostructures is reported. The interband cascade lasers, consisting of 23 cascaded active regions, lased at wavelengths near 4 μm. Continuous wave operation was observed from 60–110 μm wide by 1.02 mm long mesa-stripe lasers at temperatures up to 70 K.
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Bradshaw et al. (2000) studied this question.
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