OPTIMIZATION OF TETRAGONAL KTA1-XNBXO3-FE CRYSTALS AS STORAGE MATERIALS FOR DOUBLE-EXPOSURE HOLOGRAPHIC-INTERFEROMETRY

Autor(en): RIEHEMANN, S
LOHEIDE, S
VONBALLY, G
Stichwörter: GROWTH; Optics; PHOTOREFRACTIVE PROPERTIES; TANTALATE-NIOBATE CRYSTALS
Erscheinungsdatum: 1995
Herausgeber: TAYLOR & FRANCIS LTD LONDON
Journal: JOURNAL OF MODERN OPTICS
Volumen: 42
Ausgabe: 7
Startseite: 1427
Seitenende: 1437
Zusammenfassung: 
Double-exposure holographic interferometry with as-grown and oxidized iron-doped tetragonal potassium tantalate-niobate (KTN:Fe) crystals as a photorefractive storage material is presented. The influence of oxidation treatments on the light-induced refractive index change and decay time constant is investigated for different external electric fields and spatial frequencies. The experimental findings can be explained in terms of a charge transport model which assumes one kind of photorefractive centres with hole conductivity only. The fringe contrast and exposure time of double-exposure holographic interferograms are determined. The displacement of a test target is evaluated from interferograms utilizing a quasi-heterodyne technique. For that purpose a fully automatically working computer program is developed.
ISSN: 09500340
DOI: 10.1080/09500349514551251

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