中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1334-1338.doi: 10.1088/1009-1963/16/5/028

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Light beams with orbital angular momentum for free space optics

武京治, 李仰军   

  1. Key Laboratory of Instrumentation Science \& Dynamic Measurement (North University of China),\\ Ministry of Education, Taiyuan 030051, China
  • 收稿日期:2006-02-16 修回日期:2006-12-14 出版日期:2007-05-20 发布日期:2007-05-20

Light beams with orbital angular momentum for free space optics

Wu Jing-Zhi(武京治)† and Li Yang-Jun(李仰军)   

  1. Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, China
  • Received:2006-02-16 Revised:2006-12-14 Online:2007-05-20 Published:2007-05-20

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摘要： The light's orbital angular momentum (OAM) is a consequence of the spiral flow of the electromagnetic energy. In this paper, an analysis of light beams with OAM used for free space optics (FSO) is conducted. The basic description and conception of light's OAM are reviewed. Both encoding information into OAM states of single light beam and encoding information into spatial structure of the mixed optical vortex with OAM are discussed, and feasibility to improve the FSO's performance of security and obstruction of line of sight is examined.

关键词: orbital angular momentum, free space optics, pseudo-nondiffracting beams

Abstract: The light's orbital angular momentum (OAM) is a consequence of the spiral flow of the electromagnetic energy. In this paper, an analysis of light beams with OAM used for free space optics (FSO) is conducted. The basic description and conception of light's OAM are reviewed. Both encoding information into OAM states of single light beam and encoding information into spatial structure of the mixed optical vortex with OAM are discussed, and feasibility to improve the FSO's performance of security and obstruction of line of sight is examined.

Key words: orbital angular momentum, free space optics, pseudo-nondiffracting beams

中图分类号:  (Optical communication systems, multiplexers, and demultiplexers?)

  • 42.79.Sz
42.30.-d (Imaging and optical processing) 42.72.-g (Optical sources and standards)