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Submilliampere threshold current pseudomorphic InGaAs/AlGaAs buried-heterostructure quantum well lasers grown by molecular beam epitaxy

机译:分子束外延生长的亚毫安级阈值电流伪态InGaAs / AlGaAs埋藏异质结构量子阱激光器

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摘要

We report on low threshold current strained InGaAs/AlGaAs single quantum well lasers grown by molecular beam epitaxy. Broad-area threshold current densities of 114 A/cm2 at 990 nm were measured for 1540-µm-long lasers. Threshold currents of 2.4 mA at 950 nm were obtained for an uncoated buried-heterostructure device with a 2-µm-wide stripe and 425-µm-long cavity. With reflective coatings the best device showed 0.9 mA threshold current (L=225 µm). Preliminary modulation measurements show bandwidths up to 5.5 GHz limited by the detector response.
机译:我们报告了通过分子束外延生长的低阈值电流应变InGaAs / AlGaAs单量子阱激光器。对于1540 µm长的激光器,测量了在990 nm处114 A / cm2的广域阈值电流密度。对于具有2 µm宽的条带和425 µm长的腔体的未涂层掩埋异质结构器件,在950 nm处可获得2.4 mA的阈值电流。使用反射涂层时,最好的设备显示0.9 mA的阈值电流(L = 225 µm)。初步的调制测量显示,高达5.5 GHz的带宽受到检测器响应的限制。

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