High Power Double Cladding (DC) Pump Erbium Doped Fiber Amplifier (EDFA)

摘要

A high-powered double cladding (DC) pumped Ytterbium-free L-band Erbium doped optical fibre amplifier (EDFA) for dense-wavelength-division multiplexing (DWDM) is disclosed. The DC pumped Ytterbium-free L-band EDFA comprises a length of DC Erbium-doped fibre (105) that has a low-index, large-diameter core. For some embodiments, the DC-EDF also comprises a low-index trench that is located radially exterior to the cladding, thereby increasing cladding absorption while still effectively maintaining single-mode behaviour. The signal light is provided by a single-mode fiber (101) and the multi-mode pump light along pigtail fibers (103). The tapered fiber bundle is spliced (104) to the double-clad Erbium-doped fiber amplifier (105).