Efficient continuous-wave Tm,Ho:CaF2 laser at 2.1µm
| Autor: | Kirill Eremeev, Pavel Loiko, Abdelmjid Benayad, Gurvan Brasse, Patrice Camy, Alain Braud |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Optics Letters. 48:1730 |
| ISSN: | 1539-4794 0146-9592 |
| Popis: | We report on the first, to the best of our knowledge, continuous-wave laser operation of a Tm3+,Ho3+-codoped calcium fluoride crystal at ∼2.1 µm. Tm,Ho:CaF2 crystals were grown by the Bridgman method, and their spectroscopic properties were studied. The stimulated-emission cross section for the 5I7 → 5I8 Ho3+ transition is 0.72 × 10−20 cm2 at 2025 nm, and the thermal equilibrium decay time is 11.0 ms. A 3 at. % Tm, 0.3 at. % Ho:CaF2 laser generated 737 mW at 2062–2088 nm with a slope efficiency of 28.0% and a laser threshold of 133 mW. Continuous wavelength tuning between 1985 and 2114 nm (tuning range: 129 nm) was demonstrated. The Tm,Ho:CaF2 crystals are promising for ultrashort pulse generation at ∼2 µm. |
| Databáze: | OpenAIRE |
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