Fused Biconical Taper (FBT) is a fabrication process where two or more optical fibers are twisted together, heated, and fused to create a coupling device. These devices split or combine optical signals, essential in applications such as telecommunications, data centers, and. At the heart of many fiber-optic systems lies FBT (Fused Biconical Taper) technology, a method used to create optical couplers, splitters, and wavelength division multiplexers. At the heart of this process lies the FBT machine—a precision instrument combining thermal engineering, mechanical. Whether you're designing a PON (Passive Optical Network), upgrading your FTTH system, or deploying a new fiber backbone, understanding how an FBT splitter works and how to choose the right one is essential. In this guide, we'll explore what an FBT splitter is, how it works, its benefits and. hen a small split configuration is needed. They operate over the full standard single mode range of wavelengths (1260-1650nm) and are available in 1×2 and 2×2.