Features ● With multi-mode Pump laser and double-clad fiber, unique APC (automatic power control) and ATC (automatic temperature control) circuit for high-stability output power; ● Dual power supply available as an option: AC 220V and DC -48V ; ● ATC system and cooling air ducts optimize temperature stability and long lifecycle; ● High-power output C-Band Er-Yb co-doping and double-clad fiber amplifier with high-stability and high-precision MPU (Microprocessor-unit) system; ● Optional WDM module, applicable for the construction of single-fiber triple-wave FTTH.