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An original design of ring semiconductor lasers based on InAs/InGaAs/GaAs quantum dots, promising for clock pulse generation, optical sensing, biological and medical applications, and microwave photonics, has been proposed and tested. Lasing was obtained at room temperature with a nominal threshold current density as low as 150 A cm −2 . The output power in continuous wave mode was 45 mW.
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Gordeev et al. (2022) studied this question.
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