中国物理B ›› 2002, Vol. 11 ›› Issue (7): 710-713.doi: 10.1088/1009-1963/11/7/312

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Optically fixed photorefractive correlator

徐良瑛1, 刘立人2, 周常河2, 刘友文3   

  1. (1)Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (2)Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (3)Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; Department of Physics, Yancheng Normal College, Yancheng 224002, China
  • 收稿日期:2001-11-26 修回日期:2002-02-24 出版日期:2002-07-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 69837020) and the Natural Science Foundation of the Education Department of Jiangsu Province, China (Grant No 01KJB140008).

Optically fixed photorefractive correlator

Liu You-Wen (刘友文)ab, Liu Li-Ren (刘立人)a, Zhou Chang-He (周常河)a, Xu Liang-Ying (徐良瑛)c    

  1. a Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b Department of Physics, Yancheng Normal College, Yancheng 224002, China; c Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2001-11-26 Revised:2002-02-24 Online:2002-07-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 69837020) and the Natural Science Foundation of the Education Department of Jiangsu Province, China (Grant No 01KJB140008).

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摘要： An optically fixed photorefractive correlator is presented, where two-centre non-volatile holographic recording is employed to write and fix the matched filter in doubly doped LiNbO3 crystals. This correlator shows good correlation characteristics and insensitivity to the writing beam during readout. It can be used in cases requiring stability and not requiring modification for a long period, and it is refreshed optically when new information needs to be registered.

关键词: photorefractive effect, two-centre non-volatile holographic recording, correlator, doubly doped LiNbO3 crystals

Abstract: An optically fixed photorefractive correlator is presented, where two-centre non-volatile holographic recording is employed to write and fix the matched filter in doubly doped LiNbO3 crystals. This correlator shows good correlation characteristics and insensitivity to the writing beam during readout. It can be used in cases requiring stability and not requiring modification for a long period, and it is refreshed optically when new information needs to be registered.

Key words: photorefractive effect, two-centre non-volatile holographic recording, correlator, doubly doped LiNbO3 crystals

中图分类号:  (Hologram recording and readout methods)

  • 42.40.Ht
42.70.Ln (Holographic recording materials; optical storage media) 42.79.Hp (Optical processors, correlators, and modulators) 42.65.Hw (Phase conjugation; photorefractive and Kerr effects)