The diffraction propagation properties of double-half inverse Gaussian hollow beams

• Published in: Optics and laser technology 2014-03, Vol.56, p.404-408
• Main Authors: Liu, Hui-Long, Dong, Yuan, Zhang, Jing, Li, Shu-Tao, Lü, Yan-Fei
• Format: Article
• Language: English
• Subjects: Double-half inverse Gaussian hollow beams; Focusing; Propagation model
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2013.09.019

In the paper, double-half inverse Gaussian hollow beams, which are a new type of hollow beams, have been proposed. In the paraxial approximation, the propagation model of double-half inverse Gaussian hollow beams in free space is deduced by utilizing the Collins formula. The distribution of the optical field is simulated with different initial spot sizes (ω0=1mm and 5mm) and different propagating distances (z=10mm, 6×102mm, 1.5×103mm, 1×104mm and z=10mm, 1.5×104mm, 3×104mm and 10×104mm). And the simulated results demonstrate that the Airy pattern is derived after propagating some distance. Meanwhile, the focusing property appears visibly and the energy is redistributed intricately. In the research, the focusing distance could be controlled by transforming the initial spot size and the intensity inequality is also shown. •We propose a new style hollow beams–double-half inverse Gaussian hollow beams.•We simulate the distribution of the optical field with different initial spot size and different propagating distance.•We show a laser beam with flat-top.