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Proceedings Paper

Real-time incoherent optical pattern recognition with photorefractive crystals
Author(s): Nai-Jen Cheng; Hsiao-Yi Lee; Ren-Han Tsou; Hon-Fai Yau
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Paper Abstract

Incoherent optical pattern recognition has been demonstrated with a simple setup using photorefractive BaTiO3 crystal. The input patterns to be identified can be transmitted into the system with complete incoherent light. The setup does not required pre-fabricated filters for its operation and thus is a real-time system. The working principles of the systems are the photorefractive beam fanning effect and the degenerate four-wave mixing.

Paper Details

Date Published: 9 October 1998
PDF: 4 pages
Proc. SPIE 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV, (9 October 1998); doi: 10.1117/12.326861
Show Author Affiliations
Nai-Jen Cheng, National Central Univ. (Taiwan)
Hsiao-Yi Lee, Yunpei Institute of Medical Technology (Taiwan)
Ren-Han Tsou, Telecommunication Labs. (Taiwan)
Hon-Fai Yau, National Central Univ. (Taiwan)


Published in SPIE Proceedings Vol. 3470:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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