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
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
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.
Received: 26 November 2001
Revised: 24 February 2002
Accepted manuscript online:
(Phase conjugation; photorefractive and Kerr effects)
Fund: 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).
Cite this article:
Liu You-Wen (刘友文), Liu Li-Ren (刘立人), Zhou Chang-He (周常河), Xu Liang-Ying (徐良瑛) Optically fixed photorefractive correlator 2002 Chinese Physics 11 710
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