Low-threshold current CW operation of multiple infil buried heterostructure 1.3 μm GaInAsP lasers

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Abstract
1.3 μm buried-heterostructure lasers with CW threshold currents as low as 19 mA have been fabricated using a multilayer infil structure. This technique significantly reduces the alignment tolerances necessary for low-threshold BH laser fabrication. Single transverse and longitudinal mode operation is observed for active layer widths below 3.5 μm.