New experimental results concerning real-time hologram recording in dichromated sensitized gelatin and polyvinyl alcohol are presented. Self-enhancement of the holographic gratings observed in the dark in both of these dye-polymer systems is shown.
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Dark self-enhancement in dichromated poly(vinyl alcohol) gratings: a detailed study.
Appl Opt
December 1999
University of Joensuu, PO Box 111, FIN-80101 Joensuu, Finland.
Experimental results concerning the real-time hologram recording process in dichromated poly(vinyl alcohol) are presented. Self-enhancement, the increase in diffraction efficiency of the holographic gratings in the dark after recording, is also presented. The influence of the recording parameters (pH, exposure energy, dichromate concentration) on the self-enhancement gain is shown.
View Article and Find Full Text PDFNew experimental results concerning real-time hologram recording in dichromated sensitized gelatin and polyvinyl alcohol are presented. Self-enhancement of the holographic gratings observed in the dark in both of these dye-polymer systems is shown.
View Article and Find Full Text PDFThe relaxation processes in As(2)S(3) films related to the self-enhancement effect of holographic gratings with low initial diffraction efficiencies are examined. It is demonstrated that the dark relaxation plays a noticeable role in the self-enhancement.
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