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Realizing high density optical data storage by using orbital angular momentum of light beam

Liu Yi-Dong Gao Chun-Qing Gao Ming-Wei Li Feng

Realizing high density optical data storage by using orbital angular momentum of light beam

Liu Yi-Dong, Gao Chun-Qing, Gao Ming-Wei, Li Feng
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  • Abstract views:  3648
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  • Received Date:  15 May 2006
  • Accepted Date:  15 August 2006
  • Published Online:  26 January 2007

Realizing high density optical data storage by using orbital angular momentum of light beam

  • 1. 北京理工大学信息科学技术学院光电工程系,北京 100081

Abstract: The orbital angular momentum (OAM) states can be used to construct a high-dimensional Hilbert space, which implies higher data density when applied in data storage. This work proposes a method to realize high density optical data storage by using OAM of light beam, with the encoded area illuminated by a light beam with certain OAM resulting in distribution of power in the OAM states (the spiral spectrum or OAM spectrum), and detection of the power distribution conducing to its decoding. A quadrant staircase structure (QSS) used as an encoded element can realize 57 different states, and it is expected to enhance the data density 6 times as high as the conventional method.

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