Abdolvand Amin, Wilcox Keith G, Kalkandjiev Todor K, Rafailov Edik U
School of Engineering, Physics and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom.
Opt Express. 2010 Feb 1;18(3):2753-9. doi: 10.1364/OE.18.002753.
In 1832 Hamilton predicted conical refraction, concluding that if a beam propagates along an optic axis of a biaxial crystal, a hollow cone of light will emerge. Nearly two centuries on, cascade conical refraction involving multiple crystals has not been investigated. We empirically investigate a unique two-crystal configuration, and use this to demonstrate an ultra-efficient conical refraction Nd:KGd(WO(4))(2) laser providing multi-watt output with excellent beam quality independent of resonator design with a slope efficiency close to the theoretical maximum, offering a new route for power and brightness-scaling in solid-state bulk lasers.
1832年，哈密顿预测了圆锥折射现象，并得出结论：如果一束光沿双轴晶体的光轴传播，将会出现一个中空的光锥。近两个世纪过去了，涉及多个晶体的级联圆锥折射现象尚未得到研究。我们通过实验研究了一种独特的双晶体结构，并以此证明了一种超高效圆锥折射钕：钆钇钨（Nd:KGd(WO(4))(2)）激光器，该激光器可提供多瓦输出，具有优异的光束质量，与谐振器设计无关，斜率效率接近理论最大值，为固态块状激光器的功率和亮度提升提供了一条新途径。
