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The laser properties of Nd-doped Ca10(PO4)6F2 (FAP) and Sr10(PO4)6F2 (S-FAP) ceramics with a hexagonal (non-cubic) crystal structure were investigated at 1.06- and 1.33-mm wavelength ranges. Slope efficiencies of 10.1% and 11.7% were obtained for FAP and S-FAP ceramics at 1063 and 1059 nm, respectively. To the best of our knowledge, slope efficiency of over 10% is the highest among non-cubic ceramic materials. Additionally, laser oscillations at 1335 and 1327 nm were observed in FAP and S-FAP ceramics, respectively. The results of this study will be valuable for future advancements in achieving higher power and efficient operation of non-cubic laser ceramics.　

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  This is the Accepted Manuscript version of an article accepted for publication in Japanese Journal of Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.35848/1347-4065/addc23

Keyword: laser materials, transparent ceramics, fluorapatite

Date published: 2025-06-01

Publisher: IOP Publishing

Journal:

• Japanese Journal of Applied Physics (ISSN: 00214922) vol. 64 issue. 6 060905

Funding:

• Japan Society for the Promotion of Science 21H01611
• Fusion Oriented REsearch for disruptive Science and Technology JPMJFR203S

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5568

First published URL: https://doi.org/10.35848/1347-4065/addc23

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Updated at: 2025-07-09 11:09:38 +0900

Published on MDR: 2026-06-10 11:11:26 +0900