Nanoparticle doping as a way to enhance holmium fiber lasers efficiency
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arXiv
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| Format: | Preprint |
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2024
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| author | Kamradek, M. Kasik, I. Aubrecht, J. Varak, P. Podrazky, O. Barton, I. Pokorny, J. Peterka, P. Honzatko, P. |
| author_facet | Kamradek, M. Kasik, I. Aubrecht, J. Varak, P. Podrazky, O. Barton, I. Pokorny, J. Peterka, P. Honzatko, P. |
| contents | Highly-doped holmium fibers have been prepared using modified chemical vapor deposition in combination with nanoparticle-doping method. Within a series of various Al2O3 and Ho3+ concentrations, relations between fibers composition and their fluorescence and laser parameters have been studied. Al/Ho molar ratio equal to at least 50 was found to be the key factor for fibers with outstanding parameters. Fibers with slope efficiency above 80%, laser threshold below 100 mW and fluorescence lifetime up to 1.6 ms have been prepared. Thanks to high Al2O3 concentrations, obtained through nanoparticle doping, we were able to achieve high-performance fibers in a wide range of Ho3+ concentrations. An output power of 19 W with 81% slope efficiency was reached using fiber with almost 4000 ppm of Ho3+ and 10 mol.% of Al2O3. This result is encouraging for highly efficient high-power cladding-pumped holmium fiber lasers, and studied relations between fibers composition and their laser parameters will be used in the designing of such laser sources. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_10593 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nanoparticle doping as a way to enhance holmium fiber lasers efficiency Kamradek, M. Kasik, I. Aubrecht, J. Varak, P. Podrazky, O. Barton, I. Pokorny, J. Peterka, P. Honzatko, P. Optics Applied Physics Highly-doped holmium fibers have been prepared using modified chemical vapor deposition in combination with nanoparticle-doping method. Within a series of various Al2O3 and Ho3+ concentrations, relations between fibers composition and their fluorescence and laser parameters have been studied. Al/Ho molar ratio equal to at least 50 was found to be the key factor for fibers with outstanding parameters. Fibers with slope efficiency above 80%, laser threshold below 100 mW and fluorescence lifetime up to 1.6 ms have been prepared. Thanks to high Al2O3 concentrations, obtained through nanoparticle doping, we were able to achieve high-performance fibers in a wide range of Ho3+ concentrations. An output power of 19 W with 81% slope efficiency was reached using fiber with almost 4000 ppm of Ho3+ and 10 mol.% of Al2O3. This result is encouraging for highly efficient high-power cladding-pumped holmium fiber lasers, and studied relations between fibers composition and their laser parameters will be used in the designing of such laser sources. |
| title | Nanoparticle doping as a way to enhance holmium fiber lasers efficiency |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2412.10593 |