| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-powered double cladding (DC) pumped ytterbium-free L-band erbium doped fiber amplifier (EDFA) for dense-wavelength-division multiplexing (DWDM).SOLUTION: A DC pumped ytterbium-free L-band EDFA comprises a length of DC erbium-doped fiber (EDF) that has a low-refractive index, large-diameter core. For some embodiments, the DC-EDF also comprises a trench that is located radially exterior to the cladding, thereby increasing cladding absorption while still effectively maintaining single-mode behavior. |
