Integrated Component Isolator and Single-Mode/Multimode WDM

This hybrid device combines an input multi-mode 9xx nm pump with a 1550 nm single-mode signal and a double cladding fiber (DCF) output for high-power optical amplification applications. A single-stage isolator for a 1550 nm signal is integrated into the device to allow better performance and greater integration of the high-power erbium doped fiber amplifier (EDFA) design.