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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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Shardlow, Peter
University of Southampton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 201947 W continuous-wave 1726 nm thulium fiber laser core-pumped by an erbium fiber lasercitations
- 2019Amplification of a radially polarized beam in a thermally-guiding fiber-rod amplifier
- 2019Thulium-doped Fibre Laser with 25 W Single-mode Output at 1726 nmcitations
- 2019High power 1726nm operation of a thulium fiber laser pumped in-band by an erbium-only fiber laser
- 2017Holmium doped fibre optimised for resonant cladding pumping
- 2015Cladding shaping of optical fibre preforms via CO2 laser machining
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document
Cladding shaping of optical fibre preforms via CO2 laser machining
Abstract
Double-clad silica fibres used in high power lasers typically comprise a core doped with a laser active ion, a silica inner-cladding pump guide and a low refractive index outer polymer coating for protection and low loss pump guidance. For efficient pump absorption in the active-ion doped core, the inner-cladding must be shaped in order to scramble the pump radiation to achieve a high spatial overlap with the core. This shaping is traditionally undertaken via diamond milling of the fibre preform into an octagon or hexagon, leaving a rough surface that is subsequently fire polished. We report on a new approach for shaping the inner-cladding using a CO<sub>2</sub> laser to machine the fibre preform. This process is shown to allow fabrication of novel cladding structures, which include concave and convex surfaces, as well as a significant increase in the processing speeds and avoids the need for fire polishing prior to fibre drawing.