Photorefractive novelty filters for transient phase evaluation

Henning Rehn; Matthias Esselbach; Richard M. Kowarschik; Klaus H. Ringhofer

doi:10.1117/12.250805

18 September 1996 Photorefractive novelty filters for transient phase evaluation

Henning Rehn, Matthias Esselbach, Richard M. Kowarschik, Klaus H. Ringhofer

Proceedings Volume 2782, Optical Inspection and Micromeasurements; (1996) https://doi.org/10.1117/12.250805
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

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.

Citation Download Citation

Henning Rehn, Matthias Esselbach, Richard M. Kowarschik, and Klaus H. Ringhofer "Photorefractive novelty filters for transient phase evaluation", Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); https://doi.org/10.1117/12.250805

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