Comparison of Low Loss and Advantages Disadvantages of PLC Splitter Performance

PLC splitters offer consistent low-loss performance for high-ratio PON deployments, with advantages in uniformity, scalability, and reliability, though they may have slightly higher base insertion loss and cost compared to FBT splitters.Low Loss PerformanceInsertion Loss: PLC splitters typically exhibit slightly higher base insertion loss than FBT splitters in low-ratio configurations (1x2: 3.8–4.2 dB) due to waveguide coupling inefficiencies, whereas FBT splitters achieve 3.2–3.8 dB for the same ratio . However, for high-ratio splits (1x32 or 1x64), PLC splitters maintain consistent total loss (16.5–17.5 dB) because of their monolithic single-chip design, avoiding the compounded loss seen in cascaded FBT splitters . This makes PLC splitters ideal for long-reach GPON links exceeding 20 km. Uniformity and Wavelength Stability: PLC splitters provide highly uniform power distribution across all outputs and stable performance across multiple wavelengths (1310 nm, 1490 nm, 1550 nm), which is critical for multi-service PON networks . FBT splitters, while efficient in low-split ratios, can suffer from uneven distribution and wavelength sensitivity in higher split ratios.Advantages of PLC SplittersScalability: PLC splitters support high split ratios (up to 1x64) without cascading, enabling large-scale FTTH deployments .Reliability: They maintain signal integrity over long distances and multiple wavelengths, minimizing bit error rates .Compact and Flexible Deployment: PLC splitters can be deployed in centralized or distributed architectures, offering design flexibility for urban and rural networks .Cost-Effective for Large Networks: While initial cost is higher than FBT, PLC splitters reduce operational complexity and long-term maintenance costs in high-density networks .Consistent Performance: Monolithic design ensures low excess loss and uniform output, critical for high-ratio PONs .Disadvantages of PLC SplittersHigher Base Loss in Low-Ratio Splits: For 1x2 or 1x4 configurations, PLC splitters may have 0.5–1 dB higher insertion loss than FBT, making FBT slightly more efficient for short-reach access drops .Cost: PLC splitters are generally more expensive upfront than FBT splitters, which can be a consideration for small-scale or legacy networks .Limited Customization in Blockless Designs: Some PLC blockless splitters have maximum splitting ratios, which may restrict flexibility in certain network designs .Complexity in Handling: While reliable, PLC splitters require careful handling during installation to avoid damage to the waveguide chip, unlike simpler FBT units .SummaryPLC splitters are the preferred choice for high-ratio, long-reach, and multi-wavelength PON networks due to their consistent low-loss performance, uniformity, and scalability. FBT splitters may still be advantageous in low-split, short-reach deployments due to slightly lower insertion loss and lower initial cost. Network designers should weigh split ratio, link distance, and long-term operational efficiency when selecting between PLC and FBT splitters .