Article Overview
High optical attenuation in Huawei optical splitters is typically caused by splitter design, connector quality, improper installation, or cascading multiple splitters, and can be mitigated through PLC uneven splitters, sealed connectors, and careful ODN deployment.
Causes of High Attenuation
- Splitter Design and Split Ratio Huawei optical splitters, including PLC (Planar Lightwave Circuit) and FBT (Fused Biconical Taper) types, inherently introduce insertion loss depending on the split ratio. For example, a 1:32 or 1:64 splitter can have higher loss due to the division of optical power among multiple outputs. Uneven PLC splitters, such as 1:9 or 1:17, are designed to allocate more power to critical paths, reducing effective attenuation for local users, but cascading multiple splitters can still accumulate loss .
- Connector and Pigtail Quality High attenuation often arises from poor connector end-face quality or contamination. Huawei emphasizes cleaning connectors before testing, as insertion loss includes connector loss. QuickConnect connectors in DQ ODN solutions are fully sealed (IP68) to prevent dust ingress and maintain stable link attenuation over time .
- Cascading and Uneven Splitting In multi-level ODN deployments, several uneven splitters may be cascaded. While uneven splitting optimizes power distribution, the later stages receive less optical power, which can appear as high attenuation if not properly accounted for in the optical budget .
- Installation and Environmental Factors Traditional FATs (Fiber Access Terminals) that require frequent opening can compromise sealing, leading to weak-light issues and increased attenuation. Mechanical stress, bending, or improper splicing can also contribute to higher losses .
Mitigation Strategies
- Use of PLC Uneven Splitters: Huawei's PLC uneven splitters (1:2, 1:5, 1:9, 1:17) optimize power allocation, ensuring sufficient signal strength for local users while minimizing overall loss .
- Sealed QuickConnect Connectors: Fully sealed connectors prevent dust and moisture ingress, maintaining low insertion loss (0.08 dB typical) compared to conventional connectors (0.3 dB), .
- Proper ODN Deployment: Pre-connection, cascading planning, and avoiding unnecessary splicing reduce cumulative attenuation. DQ ODN solutions allow plug-and-play installation, reducing weak-light problems by up to 80% .
- Regular Testing and Cleaning: Using OTDR and optical power meters to verify link loss and cleaning connector end-faces before deployment ensures attenuation remains within the optical power budget .
Conclusion
High optical attenuation in Huawei optical splitters is usually a combination of splitter design, connector quality, cascading effects, and installation practices. By leveraging PLC uneven splitters, sealed connectors, careful ODN planning, and proper testing, operators can maintain stable optical links and minimize signal loss, ensuring reliable PON performance .
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