Values ​​of each interface of the optical splitter

The value of each interface of an optical splitter is determined by its split ratio, which defines how the input optical power is distributed among the output ports.Split Ratios and Output PowerOptical splitters divide a single input signal into multiple outputs. The split ratio indicates the fraction of input power each output receives:1x2 splitter: Each output receives approximately 50% of the input power (50:50) for PLC splitters; FBT splitters may have unequal ratios like 60:40 depending on wavelength .1x4 splitter: Each output receives roughly 25% of the input power.1x8 splitter: Each output receives about 12.5% of the input power.1x16 splitter: Each output receives about 6.25% of the input power.1x32 splitter: Each output receives about 3.125% of the input power.1x64 splitter: Each output receives about 1.5625% of the input power . For non-uniform or unbalanced splitters, the output power may vary across ports, such as 70:30 for a 1x2 FBT splitter at certain wavelengths .Insertion LossEach output port also experiences insertion loss, which is the reduction in optical power relative to the input. Typical insertion losses for uniform PLC splitters are:1x2: ~3.5 dB1x4: ~7 dB1x8: ~10.5 dB1x16: ~13.5 dB1x32: ~17 dB1x64: ~20 dB Insertion loss increases with the number of outputs, and minimizing it is crucial for maintaining signal quality in PON networks .Splitter Types and CharacteristicsPLC (Planar Lightwave Circuit) splitters: Provide highly uniform output power across all ports, ideal for large splits like 1x32 or 1x64 .FBT (Fused Biconical Taper) splitters: Can have unequal output power and are typically used for small splits like 1x2 or 1x4 .Practical ConsiderationsCentralized splitting: Splitters are located at a central office, allowing reconfiguration via jumpers .Distributed splitting: Splitters are placed in the field, often in closures or pedestals, with fixed output assignments .Cascaded splitting: Combines multiple splitters (e.g., 1x4 followed by 1x8) to achieve higher split ratios like 1x32, with cumulative insertion loss . In summary, the value of each interface is primarily determined by the split ratio and insertion loss, with PLC splitters providing uniform outputs and FBT splitters offering flexibility for custom ratios. Proper selection ensures sufficient signal strength for all end users in a PON network.