Abstract

Investigations of the environmental stability of diffraction gratings, recorded in dichromated pullulan (DCP), arereported. Profile changes of DCP surface relief gratings, under high humidity conditions, were analyzed using an atomic force microscope. It was found that the profile was not altered, while the diffraction efficiency was preserved. The influence of storage life on the diffraction efficiency and surface profile of DCP gratings were also investigated. It was concluded that DCP gratings offer much better stability compared with the dichromated gelatin.

© 2007 Optical Society of America

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