We investigated experimentally the temperature dependence of the threshold current in 1.3-μm AlGaInAs-InP strained multiple-quantum-well lasers. We find that radiative recombination constitutes almost 100% of the threshold current up to 220 K and remains more than 70% even at 300 K. This results in a high characteristic temperature T0.
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Higashi et al. (1999) studied this question.
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