A single-chip optical splitter (PLC splitter) passively divides one input optical signal into multiple outputs, allowing you to connect multiple end devices without additional fibers.

Understanding the Single-Chip (PLC) Splitter

A Planar Lightwave Circuit (PLC) splitter is a passive optical device that splits a single input signal into multiple outputs using etched waveguides on a silica chip. It requires no power, is highly reliable, and provides uniform signal distribution across all output ports. Common split ratios include 1×4, 1×8, 1×16, 1×32, or higher, depending on the number of users or devices you need to serve . PLC splitters are widely used in FTTH and PON networks to distribute signals from an Optical Line Terminal (OLT) to multiple Optical Network Terminals (ONTs) at user locations .

Steps to Use a Single-Chip Optical Splitter

1. Select the Appropriate Splitter
   • Determine the number of outputs required and choose a splitter with the matching split ratio (e.g., 1×8 for eight users).
   • Choose the connector type compatible with your network equipment, such as SC/APC, LC/UPC, or FC .
2. Prepare the Fiber Connections
   • Ensure all fibers are clean and free of dust or debris.
   • Use proper fiber optic tools to strip, cleave, and polish fibers if connecting bare fibers.
3. Connect the Input Fiber
   • Connect the upstream fiber from the OLT or central node to the input port of the splitter.
   • Ensure a secure connection to minimize insertion loss.
4. Connect the Output Fibers
   • Connect each output port to the downstream devices (ONTs or other network nodes).
   • Label each output for easy identification and maintenance.
5. Install the Splitter
   • Place the splitter in a distribution box, patch panel, or outdoor enclosure.
   • Ensure it is protected from moisture, dust, and physical stress. Many PLC splitters come in IP65-rated ABS or LGX boxes for outdoor use .
6. Test the Network
   • Use an optical power meter or OTDR to verify signal strength and uniformity across all outputs.
   • Check for excessive insertion loss or uneven distribution, which may indicate a connection issue.

Deployment Considerations

• Centralized vs. Cascaded Splitting: Centralized splitting places the splitter near the OLT, while cascaded splitting uses multiple splitters in series to reach more users .
• Signal Loss: Each split reduces signal power; higher split ratios require careful planning to maintain adequate signal levels.
• Bidirectional Use: PLC splitters can handle signals in both directions, supporting upstream and downstream communication in PON systems . By following these steps, a single-chip optical splitter can efficiently distribute optical signals to multiple endpoints, reducing fiber infrastructure costs while maintaining reliable network performance.