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We present a suite of silica-based thulium-doped fiber amplifiers (TDFAs) operating across the 1650–2050nm waveband. High gain and low NF are achieved by combining several TDFA designs optimized for short, central and long wavelength operation.
We report the realization of a wideband holmium doped fiber amplifier designed for optical communications over 2050 – 2130 nm, providing up to 28 dB small signal gain and 4 – 9.5 dB noise figure.
We report the first demonstration of in-band diode-pumped silica-based thulium-doped fiber amplifiers working in the 1.7–1.8 μm waveband. Compared to previously reported results, 90 nm gain extension has been achieved by exploiting novel amplifier designs.
We report the realization of a thulium doped fiber amplifier designed for optical communications providing high gain (>35dB) and low noise figure (<;6dB) over 1910nm-2020nm with a maximum saturated output power of more than 1W.
We report the first experimental realization of thulium doped fiber amplifier providing high gain (>40dB), noise figure as low as 5dB and over 100nm wide bandwidth around 2µm with maximum saturated output power of 400mW.
We present results on broadband gain equalisation in a MM-EDFA for SDM transmission obtained by optimization of the pump launch and careful tailoring of both the fiber refractive index profile and erbium ion distribution.
We demonstrate simultaneous modal gains of ∼20dB for different pair-wise combinations of spatial and polarization modes in a MM-EDFA. The differential modal gains are reduced by fiber design and control of the pump field distribution.
We present the first systematic study of a two-moded erbium-doped fiber amplifier, and identified its performance trends. By optimizing dopant distribution and pump modes we achieved over 22dB gain for both LP01 and LP11-modes.
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