This study was supported by NSFC (50902139, 60928010), Nanjing University of Technology PhD thesis innovation fund (BSCX200902) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
Polycrystalline Ho:YAG Transparent Ceramics for Eye-Safe Solid State Laser Applications
Article first published online: 22 NOV 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 95, Issue 1, pages 52–55, January 2012
How to Cite
Yang, H., Zhang, J., Qin, X., Luo, D., Ma, J., Tang, D., Chen, H., Shen, D., Zhang, Q. (2012), Polycrystalline Ho:YAG Transparent Ceramics for Eye-Safe Solid State Laser Applications. Journal of the American Ceramic Society, 95: 52–55. doi: 10.1111/j.1551-2916.2011.04953.x
- Issue published online: 3 JAN 2012
- Article first published online: 22 NOV 2011
- Manuscript Accepted: 12 OCT 2011
- Manuscript Received: 22 JUL 2011
- NSFC. Grant Numbers: 50902139, 60928010
- Nanjing University of Technology. Grant Number: BSCX200902
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
High optical quality holmium doped yttrium aluminum garnet (Ho:YAG) transparent ceramics that contained 0.5–2.0 at.% holmium additives were fabricated by a reactive sintering method under vacuum. Fully dense Ho:YAG ceramics with the average grain size of ~10 μm were obtained after vacuum sintered at 1780°C for 8 h. The in-line transmittances in the visible and infrared region are higher than 82% and 84%. The absorption coefficients of the 0.8, 1.0, 1.5, and 2.0 at.% Ho:YAG ceramics at 1907 nm was calculated to be 0.72, 0.89, 1.32, and 1.78 cm−1, respectively. The absorption cross-section of Ho:YAG ceramic was 0.645 × 10−20 cm2. The 1.5 and 2.0 at.% Ho:YAG ceramic slabs were in-band pumped by a Tm:fiber laser at 1907 nm. A maximum output power of 20.6 W at 2097 nm was obtained with a corresponding slope efficiency of 60.9%.