EYDFA is widely used in analog and digital CATV, FTTx PON, and RFoG (RF over Glass) networks. There is a solution combined with EYDFA for XGS-PON and GPON mixed networks
What is PON EYDFA (EDFA)?
The most important application for EYDFA is enabled with WDM PON combiner inside. CATV signal in 1550nm and PON signal in 1310nm/1490nm or 1270nm/1577nm mix into one fiber under Wavelength Division Multiplexing (WDM) technology. The RF overlay technology allows GPON/XGS-PON networks to carry CATV signal with Gigabit/10-Gigabit data services to help local MSO save investments and still keep incomes from existing networks.
EYDFA RF overlay on GPON, XGS-PON Networks