Search

Article

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

The second-order moment representation of nonparaxial vectorial Laguerre-Gaussian beams

Kang Xiao-Ping Lü Bai-Da

The second-order moment representation of nonparaxial vectorial Laguerre-Gaussian beams

Kang Xiao-Ping, Lü Bai-Da
PDF
Get Citation

(PLEASE TRANSLATE TO ENGLISH

BY GOOGLE TRANSLATE IF NEEDED.)

Metrics
  • Abstract views:  4139
  • PDF Downloads:  1454
  • Cited By: 0
Publishing process
  • Received Date:  03 August 2005
  • Accepted Date:  28 December 2005
  • Published Online:  20 September 2006

The second-order moment representation of nonparaxial vectorial Laguerre-Gaussian beams

  • 1. (1)四川大学激光物理与化学研究所,成都 610064; (2)四川大学激光物理与化学研究所,成都 610064;琼州大学物理系,五指山 572200

Abstract: Based on the nonparaxial vectorial moment theory of light beam propagation proposed by Porras, the characteristic parameters, such as the beam width, far-field divergence angle and M2 factor of nonparaxial vectorial Laguerre-Gaussian (LG) beams with initial circular polarization, are derived and expressed in terms of a series sum. The nonparaxial vectorial Gaussian beam is treated as a special case of our result. It is shown that the second-order-moment based beam width propagates according to the hyperbolic law, and for w0/λ→0 (w0-waist width,λ-wavelength) the far-field divergence angle θ approaches 90°, which is larger than 63.435° predicated by the nonparaxial scalar theory. The M2 factor of nonparaxial vectorial LG beams depends not only on the mode index p, but also on the w0/λ. Finally, comparison between the propagation of nonparaxial vectorial LG beams and that of nonparaxial scalar LG beams indicates that the far-field divergence angle is greatly influenced by the vectorial effect when w0/λ is relatively small. The problem which results from θ→90° and the applicability of the nonparaxial vectorial moment theory as well as the possible method for solving the problem are discussed.

Catalog

    /

    返回文章
    返回