Journal
FRONTIERS IN PHYSICS
Volume 10, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.1080275
Keywords
attenuation loss; side-pumped; end-pumped; Nd:YAG ceramic laser; optical conversion efficiency
Categories
Funding
- National Key Research and Development Program of China [2022YFB3607900]
- Key Laboratory Foundation of Chinese Academy of Sciences
- Key Lab of Solid State Laser [CXJJ-22S020]
- National Science Foundation for Young Scientists of China [11504389, 51890864, 62005295]
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This study investigated the attenuation loss effect and laser performance enhancement of Nd:YAG transparent ceramics. It was found that a high-optical quality Nd:YAG ceramic rod combined with 885-nm direct pumping technology can generate high-power and high-efficiency laser output.
Here, the attenuation loss effect and laser performance enhancement of Nd:YAG transparent ceramics were investigated. Using a 0.6 at.% Nd:YAG ceramic rod of 3 mm diameter and 65 mm length, the scattering coefficient and absorption coefficient at 1,064 nm were measured to be 0.0001 cm(-1) and 0.0017 cm(-1), respectively. For the 808-nm side-pumped laser experiment, an average output power of 44.9 W was achieved with an optical-to-optical conversion efficiency of 26.4%, which was nearly the same with that of a 1 at% single crystal. Adopting the 885-nm direct end-pumped scheme, the following laser tests demonstrated a high optical efficiency of 62.5% and maximum output power of 144.8 W obtained at an absorbed pump power of 231.5 W. This was until now the highest optical conversion efficiency acquired in an Nd:YAG ceramic laser to our knowledge. It proves that high-power and high-efficiency laser output could be generated by a high-optical quality Nd:YAG ceramic rod along with the 885-nm direct pumping technology.
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