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

Qi Xiao-Qing Gao Chun-Qing Liu Yi-Dong

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

Qi Xiao-Qing, Gao Chun-Qing, Liu Yi-Dong
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  • Abstract views:  3899
  • PDF Downloads:  1948
  • Cited By: 0
Publishing process
  • Received Date:  17 April 2009
  • Accepted Date:  29 April 2009
  • Published Online:  15 January 2010

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

  • 1. (1)北京理工大学光电学院,北京 100081; (2)电子科技大学物理电子学院,成都 610054

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.

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