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![Enhancement of 800 nm upconversion emission in a thulium doped tellurite microstructured fiber pumped by a 1560 nm femtosecond fiber laser: Journal of Applied Physics: Vol 119, No 16 Enhancement of 800 nm upconversion emission in a thulium doped tellurite microstructured fiber pumped by a 1560 nm femtosecond fiber laser: Journal of Applied Physics: Vol 119, No 16](https://aip.scitation.org/action/showOpenGraphArticleImage?doi=10.1063/1.4947278&id=images/medium/1.4947278.figures.f5.gif)
Enhancement of 800 nm upconversion emission in a thulium doped tellurite microstructured fiber pumped by a 1560 nm femtosecond fiber laser: Journal of Applied Physics: Vol 119, No 16
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