Solid-state laser cooling of Yb3+-doped KY3F10 to 145 K
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917332885962752 |
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| author | Koldeweyh, Luca Püschel, Stefan Liestmann, Zoe Tanaka, Hiroki |
| author_facet | Koldeweyh, Luca Püschel, Stefan Liestmann, Zoe Tanaka, Hiroki |
| contents | We report laser cooling of Yb3+-doped KY3F10 (Yb:KY3F10) driven by a 100-W, 1020-nm pump source. Despite pumping at a non-optimal wavelength, high-quality KY3F10 crystals doped with 3% and 7% Yb were cooled to 145 K and 151 K, respectively, in a double-pass pump configuration. These results establish Yb:KY3F10 as an attractive laser-cooling medium competitive with Yb:YLF, the state-of-the-art laser-cooling material for optical cryocoolers. The observed cooling performance and spectroscopic characteristics suggest that lower cryogenic temperatures may be achieved through pump-wavelength optimization, enhanced pump absorption, and reduced radiative heating. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_10630 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Solid-state laser cooling of Yb3+-doped KY3F10 to 145 K Koldeweyh, Luca Püschel, Stefan Liestmann, Zoe Tanaka, Hiroki Optics We report laser cooling of Yb3+-doped KY3F10 (Yb:KY3F10) driven by a 100-W, 1020-nm pump source. Despite pumping at a non-optimal wavelength, high-quality KY3F10 crystals doped with 3% and 7% Yb were cooled to 145 K and 151 K, respectively, in a double-pass pump configuration. These results establish Yb:KY3F10 as an attractive laser-cooling medium competitive with Yb:YLF, the state-of-the-art laser-cooling material for optical cryocoolers. The observed cooling performance and spectroscopic characteristics suggest that lower cryogenic temperatures may be achieved through pump-wavelength optimization, enhanced pump absorption, and reduced radiative heating. |
| title | Solid-state laser cooling of Yb3+-doped KY3F10 to 145 K |
| topic | Optics |
| url | https://arxiv.org/abs/2603.10630 |