Earlier this month, CableLabs issued an Architecture Specification for Coherent Passive Optical Networks (CPON) 100 Gbps (100G) Single Wavelength PON.
Promising increased capacity per wavelength, extended reach and higher port density, the new spec brings coherent detect to PON access networks. Existing PON standards rely on Intensity-Modulation Direct-Detect (IM-DD) technology, which is approaching limits in terms of capacity and network reach.
With coherent detection, 100G CPON extends the reach of PON over fiber networks up to 80 kilometers. Current PON implementations typically are 25 km or less.
In addition, CPON offers a split ratio up to 512:1, providing 100 Gbps to support up to 512 end users on a single OLT port while maintaining a typical reach of 25 kilometers.
