Passive optical networks are suffering from network losses and unavailability of reach. Operators deploying networks must consider these factors and might use products with reduced optical loss such as: lower loss optical splitters, low loss fiber cable, lower loss fusion splicing, and low loss fiber connectorization products. Another method of loss reduction is changing a design so there would be less fiber connectors used. Operators should be trained for cleaning and expecting fiber endfaces that might lower the signal or for avoidance of excessive bending in closures and cabinets.
Network loss verification of specific range of PON must be done before the service activation. Three main rules must be applied by the operators:
- plicing using fusion techniques only
- connectors should be inspected and cleaned carefully
- low loss splitters must be applied
From the service providers data, AD-net Technology has found usage of 32-way splitters insufficient for active sites for trials and planned deployment. Surveys results have proven that 20% of potential FTTH locations are in the range of 10-20 km from central office. At the same time B-PON reach becomes limited after 10 km distances. This issue is significant for new developing areas of the cities which are on big distances from old parts of the city having local central offices. Solution for this problem might be either usage of remote OLT cabinets or installation of 16-way splitters with lower splitter loss. Either way, the implementation of PON network in new developing regions becomes an issue due the loss control.
Optical power loss (attenuation) in fiber access – types, values and sources
Optical Power Loss measurement in db – how to measure it fast and correct – tutorial
Testing scenario example and what do you need for optical power loss measurements
Need exact values for PLC and FBT splitters? You can check this article: Optics path attenuation ranges for EPON/GEPON applications
Also, you may want to check PLC & FBT splitters product page