An air-hole-assisted few-mode erbium-doped fiber (AH-FM-EDF) with a uniform erbium ion
doping profile is proposed for gain equalization. By introducing the central air hole, the …

The air-hole assisted few-mode fiber (AH-FMF) enables modal intensity balance and offers a
profound prospect in gain equalization with the combination of adaptive ion doping. In this …

A step index few-mode erbium-doped fiber (FM-EDF) for mode gain equalization is
designed and proposed in this paper, which uses the layered-doping method to reduce the …

A few-mode erbium-doped fiber (FM-EDF) with a step refractive index and trench structure is
designed and proposed to realize the modal gain equalization of a few-mode erbium-doped …

A ring-core few-mode erbium-doped fiber (FM-EDF) with step refractive index is designed
and proposed to realize the modal gain equalization of the amplifier. The layered-doping …

Featured Application Optical fiber transmission. Abstract Few-mode erbium-doped fiber
amplifiers (FM-EDFAs) are one of the most important optical subsystems for successful …

We present a rigorous design of few-mode erbium doping fiber (FM-EDF) with an oversized
two-layer erbium ion distribution at the central region with effective differential modal gain …

Pump selection plays an important role in an FM-EDFA when the active fiber is determined
in an MDM system. In this letter, a hybrid-pumped FM-EDFA was proposed for low …

Using the few-mode erbium-doped fiber (FM-EDF) with a simple two-layer erbium-doped
structure, we demonstrate an all-fiber FM-EDF amplifier. The gain equalization among the …

The few-mode erbium-doped fiber amplifier (FM-EDFA) is a key component of a few-mode-
fiber-based optical communication system to allow the simultaneous amplification of all …