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Generation of helical beams with pre-determined energy distribution based on phase modulation gratings

  • Xiao Qing Qi
  • , Chun Qing Gao*
  • , Yi Dong Liu
  • *Corresponding author for this work
  • Beijing Institute of Technology
  • University of Electronic Science and Technology of China

Research output: Contribution to journalArticlepeer-review

Abstract

The generation of helical beams with different pre-determined orbital angular momentum states based on computer-generated holograms is studied. The phase-type diffraction gratings are designed by using the Gerchberg-Saxton iterative method, and realized by using the spatial light modulator (SLM). In the experiments diffraction fields with different helical beams distribution are obtained by using the gratings. The theoretical simulation agrees with the experimental results. This method is meaningful for the information transmission based on the orbital angular momentum.

Original languageEnglish
Pages (from-to)264-270
Number of pages7
JournalWuli Xuebao/Acta Physica Sinica
Volume59
Issue number1
Publication statusPublished - Jan 2010

Keywords

  • Computer-generated hologram
  • Gerchberg-Saxton algorithm
  • Helical beams
  • Orbital angular momentum

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