Fiber Optic Splitter Number

Fiber optic splitter numbers indicate the number of output ports a single input fiber is divided into, commonly ranging from 1x2 to 1x64 in PON networks.

Understanding Fiber Optic Splitter Numbers

A fiber optic splitter number refers to the configuration of a splitter, expressed as 1xN, where 1 is the single input fiber and N is the number of output fibers. For example, a 1x8 splitter divides one input signal evenly into eight output signals, allowing multiple endpoints to share the same optical signal . Splitter numbers are critical in Passive Optical Networks (PON), as they determine how many Optical Network Terminals (ONTs) can be served by a single Optical Line Terminal (OLT) port .

Common Splitter Numbers

• 1x2: Splits one input into two outputs, often used for small-scale networks or redundancy .
• 1x4: Divides one input into four outputs, balancing cost and signal strength .
• 1x8: Widely used in FTTH networks, providing eight outputs per input fiber .
• 1x16: Suitable for medium-scale deployments, often in combination with other splitters .
• 1x32: Common in North American GPON networks, serving up to 32 subscribers per OLT port .
• 1x64: Increasingly used in XGS-PON networks for high-capacity deployments .

Splitter Selection Considerations

The splitter number affects signal strength at each output port. Higher split numbers reduce the optical power per output, which can impact the performance of ONTs if not properly managed . Network designers often combine splitters in stages (e.g., 1x4 followed by 1x8) to achieve the desired total split ratio while maintaining adequate signal levels .

Summary

The fiber optic splitter number is a key parameter in network design, indicating how many outputs a single fiber input can serve. Choosing the appropriate splitter number ensures efficient resource sharing, cost-effective deployment, and reliable signal distribution in FTTH and PON networks .