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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 16, Iss. 7 — Jul. 1, 1999
  • pp: 1112–1119

Photorefractive Fe:LiNbO3 crystal thin plates for optical information processing

Shiuan Huei Lin, Mei Li Hsieh, Ken Yuh Hsu, Tai Chiung Hsieh, Sheuan-Perng Lin, Tung-Sheng Yeh, Long-Jang Hu, Chin-Hwa Lin, and Hong Chang  »View Author Affiliations

JOSA B, Vol. 16, Issue 7, pp. 1112-1119 (1999)

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The effects of the donor acceptor concentration ratio in iron-doped lithium niobate (Fe:LiNbO3) crystal plates on photorefractive response time and on grating diffraction efficiency are studied both theoretically and experimentally. The results provide a useful guide for designing photorefractive plates for optical information-processing applications. Two devices for real-time image recognition have been demonstrated: a photorefractive joint-transform correlator and a VanderLugt correlator. The former emphasizes fast response time, and the latter emphasizes high diffraction efficiency. By appropriate adjustment of the dopant concentration and the ratio of the donor acceptor levels, photorefractive Fe:LiNbO3 crystals that facilitate specific applications have been designed and fabricated. Shift-invariant image correlations have been achieved.

© 1999 Optical Society of America

OCIS Codes
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(160.3730) Materials : Lithium niobate
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(200.3050) Optics in computing : Information processing

Shiuan Huei Lin, Mei Li Hsieh, Ken Yuh Hsu, Tai Chiung Hsieh, Sheuan-Perng Lin, Tung-Sheng Yeh, Long-Jang Hu, Chin-Hwa Lin, and Hong Chang, "Photorefractive Fe:LiNbO3 crystal thin plates for optical information processing," J. Opt. Soc. Am. B 16, 1112-1119 (1999)

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