5 dB depending on splitter type. Optional: patch panels, attenuators, or extra components. Helps cover dirt, aging, and measurement tolerances. Optical splitters play a crucial role in Fiber to the Home (FTTH) Passive Optical Network (PON) systems, efficiently distributing a single optical signal to multiple destinations. The split ratio and insertion loss are two key parameters defining their performance. Common values: 2, 4, 8, 16, 32, 64. DISCLAIMER: These calculators are provided for. Optical Splitter Loss Calculator the quick 10·log₁₀ (N) estimate, plus your datasheet excess.