Abstract

We report the design and performance of medium slope efficiency (64%) Holmium-doped fiber amplifiers (HDFAs) with novel alternative in-band pump wavelengths in the 1720–2000 nm spectral region. We demonstrate through simulations that pump wavelengths of 1840–1860 nm can yield significantly improved output power, gain, and optical-optical conversion efficiency compared to the previous technical and industry standard pump wavelength of 1940 nm. Our simulations are verified by experimental data.

High gain holmium-doped fibre amplifiers

Nikita Simakov, Zhihong Li, Yongmin Jung, Jae M. O. Daniel, Pranabesh Barua, Peter C. Shardlow, Sijing Liang, Jayanta K. Sahu, Alexander Hemming, W. Andrew Clarkson, Shaif-Ul Alam, and David J. Richardson
Opt. Express 24(13) 13946-13956 (2016)

Holmium-doped fiber amplifier for pumping a ZnGeP₂ optical parametric oscillator

Lars G. Holmen and Helge Fonnum
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High-power and highly efficient diode-cladding-pumped holmium-doped fluoride fiber laser operating at 2.94 μm

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Resonantly pumped Tm-doped fiber laser with >90% slope efficiency

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25  W 2  μm broadband polarization-maintaining hybrid Ho- and Tm-doped fiber amplifier

Robert E. Tench, Clement Romano, and J.-M. Delavaux
Appl. Opt. 58(15) 4170-4175 (2019)