期刊
JOURNAL OF LUMINESCENCE
卷 251, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2022.119122
关键词
Er:YAP crystal; XRCs; Spectroscopy; LD side-Pumping; High power and high-frequency mid-infrared laser
类别
资金
- National Natural Science Foundation of China (NSFC) [51872290, 52102012]
- Natural Science Foundation of Anhui Province [1908085QE176]
- Youth Fund of Advanced Laser Technology Labo- ratory of Anhui Province [AHL2020QN02]
- Hefei Institutes of Physical Science (HFIPS) Director's Fund [YZJJ2022QN08]
Er3+-doped YAP crystals with different concentrations were grown successfully, and their performance was evaluated by analyzing crystal quality and lifetime ratio. The results showed that the 15at% Er:YAP crystal had the strongest mid-infrared fluorescence intensity and best laser performance, making it a promising candidate for high-power and high-frequency mid-infrared lasers.
Er3+-doped YAP crystals with concentrations of 5 at%, 10 at%, 15 at% and 20 at% were grown successfully by Czochralski method. X-ray rocking curves suggest high crystalline quality. Lifetime ratio of I-4(13/2) and I-4(11/2) levels decreases obviously with the increase of Er3+ concentrations, which is beneficial to realize population inversion and decrease the laser threshold. Spectroscopy and laser show the 15 at% Er:YAP crystal has strongest mid -infrared fluorescence intensity and best laser performance by 968-nm LD side-pumping. Maximum average powers of 23.52 and 11.08 W are achieved at 250 and 1000 Hz, corresponding to the slope efficiency of 12.0% and 6.2%, respectively. Therefore, the 15 at% Er:YAP crystal is a promising candidate for the high-power and high-frequency mid-infrared laser.
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