科研之友
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摘要
Room temperature operation is an important criterion for high performance of quantum cascade lasers. A strain-compensated quantum cascade laser(λ≈5.5μm) with optimized waveguide structure lasing at room temperature is reported. Accurate control of layer thickness and strain-compensated material composition is demonstrated using X-ray diffraction. An output power of at least 45mW per facet is realized for a 20μm-wide and 2mm-long laser at room temperature.
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