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法国Thom son-CSF公司全部采用MOCVD方法在具有二极波纹的GaInAsP波导层上制作了掩埋脊形结构1.52μmGaInAsP/InPDFB激光器。最低阈值电流达到5mA。这是迄今为止报导过的DFB激光器的最低阈值,在
France Thom son-CSF companies all use MOCVD method to produce a buried ridge structure 1.52μmGaInAsP / InPDFB lasers on the GaInAsP waveguide layer with a two-dimensional corrugation. The lowest threshold current reaches 5mA. This is the lowest threshold reported by DFB lasers so far