Splitter failures occur primarily due to mechanical stress and environmental influence, not spontaneous optical breakdown. When splitter modules are mounted without adequate strain relief, tension transfers to internal fiber joints, gradually shifting alignment and increasing. Fiber optic splitters distribute optical power from one input fiber to multiple output fibers through either fused biconical taper (FBT) coupling or planar lightwave circuit (PLC) waveguide structures. Their performance depends on optical symmetry, waveguide integrity, and mechanical stability of. Optical splitters in the outside plant (OSP) are used mostly in passive optical networks (PONs) for fiber-to-the-user (FTTx) networks, and are often overlooked as failure points. When light travels through these splitters, some signal strength is inevitably lost. The split ratio and insertion loss are two key parameters defining their performance. Key issues include: · Signal Attenuation: The loss of signal strength as it travels through the fiber can lead to poor. Calculating splitter loss in optical fibers is essential for designing efficient optical networks.