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Proceedings Paper

Inspection of defects in optical fibers by a correlation processor
Author(s): Wei Liu; Yange Liu; Yimo Zhang; Ge Zhou
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Paper Abstract

Joint transform correlation systems are proposed for detecting defects in optical fibers. When joint transform spectrum of the reference and the signal fibers is sampled, off focus operation has been adopted. The corresponding influence on detection results is discussed in theoretical analysis, computer simulation and experimental comparison. In addition, a correlation processor is demonstrated, in which after the light from a He-Ne laser being expanded and filtered via a spatial light filter, it passes a Fourier transform lens without being collimated. This processor is actually an equivalent of joint transform correlator with long focal length Fourier transform lens. The experiment results of detecting defects in fibers are also given, which indicate that joint transform correlation systems can be used for automatic fiber defects detection.

Paper Details

Date Published: 10 March 2000
PDF: 8 pages
Proc. SPIE 3951, Diffractive/Holographic Technologies and Spatial Light Modulators VII, (10 March 2000); doi: 10.1117/12.379380
Show Author Affiliations
Wei Liu, Tianjin Univ. (China)
Yange Liu, Tianjin Univ. (China)
Yimo Zhang, Tianjin Univ. (China)
Ge Zhou, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 3951:
Diffractive/Holographic Technologies and Spatial Light Modulators VII
Ivan Cindrich; Sing H. Lee; Richard L. Sutherland, Editor(s)

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