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Three common types of optical splitters

Fiber and communications infrastructure knowledge brief Published 07 Nov 2023

Use this reference to prepare product questions for CJC FIBRE. Check interfaces, capacity, protection and installation requirements against the current product documentation.

The three main types of optical splitters are Fused Biconical Taper (FBT) splitters, Planar Lightwave Circuit (PLC) splitters, and centralized vs distributed splitters based on network architecture. 1. Fused Biconical Taper (FBT) SplittersFBT splitters are created by fusing and tapering two or more optical fibers together, allowing light to couple from one fiber to another.

They are commonly used for low-channel applications such as 1: 2 or 1: 4 splits, making them suitable for small networks or short-distance deployments.

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T splitters are cost-effective and simple to manufacture but can be sensitive to wavelength variations and have less uniform signal distribution compared to PLC splitters. 2. Planar Lightwave Circuit (PLC) SplittersPLC splitters use integrated waveguide technology on a quartz substrate to split light evenly across multiple outputs.

They are ideal for high-channel applications, supporting ratios like 1: 32 or 1: 64, which makes them perfect for FTTH networks and large-scale PON deployments.

PL

C splitters provide uniform signal distribution, wavelength insensitivity, and compact design, though they are more expensive and technically complex to manufacture. 3. Centralized vs Distributed Splitters (Network Architecture)Optical splitters can also be categorized based on deployment architecture: Centralized Splitters: Located at a central office or cabinet, serving multiple users from a single location.

They allow flexible customer assignment via fiber jumpers and are easier to manage for network changes. Distributed Splitters: Installed closer to end users in closures or pedestals. Once deployed, the customer assignment is fixed, making them suitable for stable, long-term network layouts.

Key Considerations

When selecting a splitter, important specifications include: Split Ratio: Determines how many outputs a single input fiber can serve (e.g., 1: 2, 1: 8, 1: 32). Higher ratios reduce signal power per output. Insertion Loss: The signal power lost during splitting.

Lower insertion loss ensures better signal quality for end users. Return Loss: Measures reflected light; higher values reduce interference and improve network performance. These three types—FBT, PLC, and centralized/distributed splitters—cover the main approaches to splitting optical signals in modern fiber networks, each suited to different scales, applications, and deployment strategies.

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Three common types of optical splitters

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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