略語大辞典 [L] 30 DFB distributed feed-back (laser) 分布フィードバック(レーザー). distributed feed-back (laser); ref. DBR(distributed Bragg reflector; e.g. forGaAlAS laser diodes; [L:Opt:C:E:Mat]. 丸善「略語大辞典」JLogosID : 11871622