Oppton Fused fiber optic couplers(FBT Coupler) are based on Fused Biconical Taper (FBT) technology, it is used to combine and separate optical signals transmitted on different wavelengths.designed for power splitting and tapping,CATV network,telecommunication equipment,and test equipment. Oppton's 1x2,1x3,1x4,1x5,1x6,1x7,1x8......Single window/Dual window FBT Coupler/splitter family has wide chooice on the splitting ratio from 1/99;2/98...10/90;20/80;30/70...50/50...or Customized.different package[...]