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Room temperature continuous wave operation of InAs/AlSb-based quantum cascade laser at λ ∼11 µm

Room temperature continuous wave operation of InAs/AlSb-based quantum cascade laser at λ ∼11 µm

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The InAs/AlSb quantum cascade lasers (QCLs) operating ∼11 µm in the continuous wave (cw) regime at room temperature are reported. The lasers with cleaved Fabry–Perot resonators demonstrated pulsed threshold current densities below 1 kA/cm2 at 300 K and operated in a cw up to 320 K that is the maximum temperature of such regime of operation for InAs-based QCLs. Distributed feedback lasers fabricated from the same wafer exhibited single frequency emission near 11 µm and operated in the cw regime up to 295 K.

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