GT LASERS single-wavelength Fused Bi-conical Taper (FBT) 1×N star optical fiber splitter is the series connection of N-1 pieces of 1×2 splitter. The bandwidth of +/-40nm under 1310nm, 1490nm or 1550nm makes the splitter meet the requirement of ratio accuracy. And it has feature of low additional loss and low polarization sensibility loss.