Reflection control in the PON can be managed using fusion splicing and angled end-face fiber connectors. In any fiber joint in the network is a target for reflectance, that is supposed to eliminate noise. For the analog video target is -50 dB. Mechanical splicing is creating reflection more than allowed either during installation or during environmental exposure. The solution is usage of angled connectors which have very small possibility of degradation and initial repeatable reflectance of <-50 dB. Practically, angled fiber connectors can elevate in loss but not in reflection.
Operators can implement fusion splicing and angled connectors for one or several reasons:
- control of optical reflection
- elimination of one of potential source of video picture quality degradation
- simplification of optical layer troubleshooting
- simplification of optical testing on a working PON fiber system
Use of the mechanical splicing and/or nonangled fiber connectors will result in increase of necessary testing and controls of the reflection in the network.