Li Tao, Zhou Tianyuan, Cao Yifei, Cai Zitao, Zhao Changming, Yuan Mingxing, Zheng Xinyu, Huang Guocan, Wang Zhongying, Zhang Le, Chen Hao
Opt Express. 2022 Mar 14;30(6):8762-8776. doi: 10.1364/OE.454080.
Realizing a high solar light conversion magnitude in Cr,Nd: YAG transparent ceramic is crucial to its applications in solar pumped solid state lasers. In this study, high quality Cr,Nd:YAG transparent laser ceramics with homogeneous microstructure and theoretical transmittance were fabricated, and an efficient laser oscillation of watt-level was realized by pumping ceramic at 808 nm. There were no any characteristic absorptions corresponding to Cr or Cr ions detected, even when the Cr ion doping concentration reached 0.6 at.%. Increasing Cr and Nd doping concentrations significantly enhanced the emission intensity of ceramics at 1.06 µm, and energy transfer efficiency of the 0.3 at.% Cr,Nd: YAG ceramics was increased from 14.9% to 36.9% when increasing Nd ion concentration from 0.3 at.% to 1.0 at.%, with an increasing magnitude of 247.6%. The results indicated that Cr,Nd: YAG transparent ceramic is a promising gain medium for solar pumped solid state lasers.
在Cr,Nd:YAG透明陶瓷中实现高的太阳光转换效率对其在太阳能泵浦固态激光器中的应用至关重要。在本研究中，制备出了具有均匀微观结构和理论透过率的高质量Cr,Nd:YAG透明激光陶瓷，并通过808nm泵浦陶瓷实现了瓦级的高效激光振荡。即使Cr离子掺杂浓度达到0.6at.%，也未检测到任何与Cr或Cr离子对应的特征吸收。增加Cr和Nd掺杂浓度显著提高了陶瓷在1.06μm处的发射强度，当Nd离子浓度从0.3at.%增加到1.0at.%时，0.3at.%Cr,Nd:YAG陶瓷的能量转移效率从14.9%提高到36.9%，增幅为247.6%。结果表明，Cr,Nd:YAG透明陶瓷是太阳能泵浦固态激光器中有前景的增益介质。
