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与传统的二维艾里光束相比,超艾里光束具有无衍射性、自弯曲性、自愈性等传输特性,主瓣尺寸更小、能量更集中,因此超艾里光束在光学微粒子操控等领域具有广阔的应用前景。为了得到产生超艾里光束的紧凑装置,提出了一种直接输出超艾里光束的激光器设计方案。该激光器使用激光二极管作为抽运源,采用端泵的方式抽运掺杂浓度为1%(原子分数)的掺钕钇铝石榴石(Nd:YAG)棒,以加载了超艾里光束立方相位信息的衍射光栅作为耦合输出镜,在一级衍射方向直接输出超艾里光束。计算结果表明,该激光器的阈值功率为1.4 W,当抽运功率为2 W时,输出功率达到678 mW。
Compared with the traditional two-dimensional Airy beam, ultra-Airy beam with non-diffraction, self-bending, self-healing and other transmission characteristics of the main lobe size smaller, more focused energy, so ultra-Airy beam in the optical particle manipulation Other fields have broad application prospects. In order to obtain a compact device to generate the ultra-Airy beam, a laser design scheme for directly outputting the ultra-Airy beam is proposed. The laser uses a laser diode as a pumping source and pumps end-pumped Nd: YAG doping with 1% (atomic fraction) dopant to load the Coulter Beam Phase The diffraction grating of the information is used as a coupling output mirror to directly output the super-Arrie beam in the first-order diffraction direction. The calculated results show that the threshold power of this laser is 1.4 W, and the output power reaches 678 mW when pumping power is 2 W.