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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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White, Nicholas
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Topics
Publications (7/7 displayed)
- 2021Compact chirped-pulse amplification systems based on highly Tm3+ doped germanate fibercitations
- 2020Extruded tellurite antiresonant hollow core fiber for mid-IR operationcitations
- 2019Flexible Mid-IR fiber bundle for thermal imaging of inaccessible areas ; Flexibilní svazek vláken pro tepelné zobrazování nepřístupných oblastí ve střední infračervené oblasticitations
- 2019Flexible mid-IR fiber bundle for thermal imaging of inaccessible areascitations
- 2019Highly efficient Tm3+ doped germanate large mode area single mode fiber lasercitations
- 2019Highly efficient Tm 3+ doped germanate large mode area single mode fiber lasercitations
- 2014Fabrication of multiple parallel suspended-core optical fibers by sheet-stackingcitations
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article
Highly efficient Tm3+ doped germanate large mode area single mode fiber laser
Abstract
We report the fabrication of a low numerical aperture large mode area, high<br/>concentration thulium doped germanate glass fiber using a rod-in tube technique. The fiber core is 20 μm in diameter and operates in the single-mode regime in the 2 μm region. The Tm<sup>3+</sup> ion concentration is 3×10<sup>20</sup>/cm<sup>3</sup> and the background fiber attenuation is 1.1 dB/m in the near infrared. We also demonstrate a high-power, high-efficiency fiber laser emitting at 1950 nm using a short (21-cm-long) length of the fiber. A slope efficiency of 55.9% with respect to absorbed pump power and a maximum output power of 1.52W was achieved. This represents both the highest slope efficiency and the highest output power reported so far for Tm<sup>3+</sup> doped germanate single mode fiber using in-band core pumping. The large core area, short device length and high efficiency make this fiber attractive for the development of high peak power pulsed fiber amplifiers and single-frequency fiber lasers operating in the 2 µm region.