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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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Kim, J. W.
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Publications (9/9 displayed)
- 2018Analysis of design and fabrication parameters for lensed optical fibers as pertinent probes for sensing and imagingcitations
- 2017Orphan spins in the (S = {5 over 2}) antiferromagnet (CaFe_2O_4)citations
- 2012Interfacial Ferromagnetism and Exchange Bias in CaRuO3/CaMnO3 Superlatticescitations
- 2010Role of Additives in LiBH4-MgH2 Reactive Hydride Composite sorption reactionscitations
- 2010Efficient in-band pumped Ho:LuLiF4 2µm lasercitations
- 2010Novel technique for mode selection in a large-mode-area fiber laser
- 2010Efficient fiber-laser pumped Ho:LuLiF4 lasercitations
- 2010Efficient fiber-laser pumped Ho:LuLiF 4 lasercitations
- 2009High power thulium doped fiber laserscitations
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document
Efficient fiber-laser pumped Ho:LuLiF4 laser
Abstract
We present results for an efficient Ho:LuLiF<sub>4</sub> laser in-band pumped by a cladding-pumped Tm-doped silica fiber laser. The polarized, tunable Tm-doped silica fiber-laser operates at 1938 nm, ideally suited for in-band pumping the 40 mm long weakly-doped (0.25 at.%) Ho:LuLiF<sub>4</sub> crystal. Using a simple laser resonator a maximum output power of 5.1 W was achieved at a wavelength of 2066 nm for 8.0 W of absorbed pump power, when using an output coupling mirror with 20% transmission, corresponding to a slope efficiency of 70%. At a higher cavity output coupling of 37%, the lasing wavelength shifted to a higher gain peak at 2053 nm, where a maximum output power of 5.4 W was obtained with a slope efficiency of 76%. Beam quality was measured to be M2~1.1 at the maximum output power for each resonator configuration. The spectroscopy, lifetime of the upper laser level, and the laser performance will be discussed in terms of future prospects for power scaling and further improvements in the laser efficiency.