在衬底表面制作超晶格缓冲层可以有效地掩埋体材料的缺陷，使阈值电流大幅度降低，光功率成倍增长。所研制出的量子阱激光器室温脉冲平均线性光功率大于２０ｍＷ（未镀反射膜），波长为７７８ｎｍ，最低阈值电流为３０ｍＡ，阈值电流密度为４００～６００Ａ／ｃｍ２，谱线宽度为５ｎｍ。 Fabrication of the superlattice buffer layer on the substrate surface can effectively cover the defects of the bulk material, greatly reduce the threshold current and double the optical power. The developed quantum well laser has an average linear optical power at room temperature greater than 20mW (uncoated), a wavelength of 778nm, a minimum threshold current of 30mA, a threshold current density of 400-600A / cm2 and a spectral width of 5nm.