New concept for multiple-valued optical memory

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New concept for multiple-valued optical memory

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The authors propose and demostrate a new concept for multiple-valued optical memory, instead of the usual binary optical memory, based on the recognition of an angle of the slender diffracted-light pattern from one of the slits or slender pits formed, in order, along a track of the optical disk.

Inspec keywords: optical disc storage; photodiodes; light diffraction; laser beam applications

Other keywords: He-Ne laser; 633 nm; optical disk; angle recognition; He-Ne; clock face configuration; photodiode array; multiple-valued optical memory; slender diffracted-light pattern

Subjects: Optical storage and retrieval; Optical storage; Laser applications

References

    1. 1)
      • N. Miyagawa , Y. Gotoh , E. Ohno , K. Nishiuchi , N. Akahira . Land and groove recording for high track density on phase-change opticaldisks. Jpn. J. Appl. Phys. , 5324 - 5328
    2. 2)
      • R. Paschotta , K. Fielder , P. Kurz , R. Henking , S. Schiller , J. Mlynek . 82% efficient continuous-wave frequency doubling of 1.06 µm witha monolithic MgO:LiNbO3 resonator. Opt. Lett. , 1325 - 1327
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19970608
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