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Proceedings Paper

Photorefractive novelty filters for transient phase evaluation
Author(s): Henning Rehn; Matthias Esselbach; Richard M. Kowarschik; Klaus H. Ringhofer
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Paper Abstract

In our report we compare different ways of realizing an optical novelty filter with photorefractive barium titanate crystals. We present experiments on the basis of beam fanning, two-wave mixing and self-pumped phase conjugate geometries. The application of photorefractive novelty filters not only for phase visualization but also for the measurement of transient phase changes in a laser beam is demonstrated. The phase calculation from an interferogram is supplied or replaced by the novelty filter's phase transfer function. The use of such techniques instead of conventional interferometry for transient phase evaluation results in a simplified measuring procedure.

Paper Details

Date Published: 18 September 1996
PDF: 8 pages
Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); doi: 10.1117/12.250805
Show Author Affiliations
Henning Rehn, Friedrich-Schiller-Univ. Jena (Germany)
Matthias Esselbach, Friedrich-Schiller-Univ. Jena (Germany)
Richard M. Kowarschik, Friedrich-Schiller-Univ. Jena (Germany)
Klaus H. Ringhofer, Univ. Osnabrueck (Germany)


Published in SPIE Proceedings Vol. 2782:
Optical Inspection and Micromeasurements

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