Nanoparticle doping as a way to enhance holmium fiber lasers efficiency
| Autor: | Kamradek, M., Kasik, I., Aubrecht, J., Varak, P., Podrazky, O., Barton, I., Pokorny, J., Peterka, P., Honzatko, P. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Optics Communications, Volume 575, 2025, 131290 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.optcom.2024.131290 |
| Popis: | 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. Comment: 9 pages, 5 figures |
| Databáze: | arXiv |
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