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Splitter-type optical splitter

ODN and passive infrastructure knowledge brief Published 16 Sep 2023

Prepared for preliminary research by the GESTIONVAL ODN knowledge desk. Confirm network topology, split ratio, box or cabinet capacity, joint closure rating and loss budget against current standards and product documentation.

A splitter-type optical splitter is a passive device that divides a single optical signal into multiple outputs or combines multiple signals into one, enabling efficient distribution in fiber optic networks.Overview

A splitter-type optical splitter is a passive optical component that operates without electricity, relying on the physics of light to distribute signals. It is widely used in Passive Optical Networks (PON), including FTTH, FTTX, EPON, GPON, and BPON, to share a single fiber among multiple users or devices while maintaining signal quality and network efficiency .

How It Works

The splitter functions by manipulating light through waveguides or fiber fusion techniques:

  1. Signal Ingress: The incoming optical signal enters the splitter via a single input fiber.
  2. Waveguide Interaction: Inside, the signal encounters a network of channels or fused fibers that guide and redistribute the light.
  3. Power Division: The light is split according to the split ratio (e.g., 1:2, 1:4, 1:32), with each output receiving a portion of the input power.
  4. Signal Egress: The divided signals exit through multiple output fibers, each leading to a user or network device .
Types of Splitters1. Fused Biconical Taper (FBT) Splitters
  • Made by fusing and tapering two or more fibers.
  • Split ratios are controlled by adjusting the coupling length and fiber geometry.
  • Advantages: Simple design, cost-effective for small networks.
  • Limitations: Less uniform power distribution at higher split ratios, sensitive to wavelength variations .
2. Planar Lightwave Circuit (PLC) Splitters
  • Based on integrated waveguide technology on a quartz substrate.
  • Provides uniform light distribution across many outputs, insensitive to wavelength.
  • Suitable for high-density networks (e.g., 1:32, 1:64) and FTTH deployments.
  • Advantages: Compact, reliable, supports many branching channels.
  • Limitations: Higher manufacturing complexity and cost compared to FBT .
Split Ratios and Applications
  • 1:2, 1:4: Small networks, office or apartment buildings.
  • 1:8 to 1:64: Large-scale FTTH networks serving multiple homes.
  • Multiplexed splitters (e.g., 2:8, 4:16): Combine multiple inputs into multiple outputs for distributing separate signals like data and video .
Key Features
  • Passive Operation: No power required, ideal for remote or outdoor installations.
  • Bidirectional Functionality: Can split outgoing signals and combine incoming signals.
  • Compact Design: Fits into patch panels, junction boxes, or outdoor enclosures.
  • Insertion Loss: Signal attenuation occurs naturally due to splitting; higher split ratios increase loss.
  • Uniformity: Ensures consistent output power across all ports, critical for network performance .
Applications
  • FTTH Networks: Distribute a single fiber to multiple homes efficiently.
  • Data Centers: High-density PLC splitters distribute signals between servers and switches.
  • Outdoor Telecom Networks: Weatherproof splitters for pole-mounted or underground use.
  • Optical Sensing and Monitoring: Used in fiber optic sensing systems and network monitoring . In summary, splitter-type optical splitters are essential for modern fiber optic networks, enabling cost-effective, scalable, and reliable signal distribution without active components, with FBT and PLC technologies offering solutions for different network scales and requirements.

Splitter-type optical splitter - GESTIONVAL ODN INFRASTRUCTURE S.L. [PDF]

Splitter-type optical splitter

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Technical note

This reference is intended for preliminary ODN and passive infrastructure research. Topology, split ratio, box or cabinet capacity, closure rating, cable type, test limits and applicable standards must be verified for the specific project.

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