The 1×2 1260~1620nm All Band Singlemode FBT Coupler Splitter With ABS Box is a high-performance optical power-splitting device engineered to operate across the entire telecom wavelength spectrum—from 1260 nm to 1620 nm, covering O, E, S, C, L, and U bands. Manufactured using advanced Fused Biconical Taper (FBT) technology, this splitter delivers low insertion loss, excellent splitting accuracy, low polarization-dependent loss (PDL), and stable performance over the full broadband wavelength range.