C Sudha Kartha
Articles written in Pramana – Journal of Physics
Volume 75 Issue 6 December 2010 pp 1241-1247 Conributed Papers
Recording multiple holographic gratings in silver-doped photopolymer using peristrophic multiplexing
V Pramitha Rani Joseph K Sreekumar C Sudha Kartha
Plane-wave transmission gratings were stored in the same location of silver-doped photopolymer film using peristrophic multiplexing techniques. Constant and variable exposure scheduling methods were adopted for storing gratings in the film using He–Ne laser (632.8 nm). The role of recording geometry on the dynamic range of the material was studied by comparing the results obtained from both techniques. Peristrophic multiplexing with rotation of the film in a plane normal to the bisector of the incident beams resulted in better homogenization of diffraction efficiencies and larger $M /#$ value.
Volume 82 Issue 2 February 2014 pp 259-264 Contributed Papers
Reflection mode holographic recording in methylene blue-sensitized polyvinyl alcohol acrylamide films
C S Rajesh R Anjana S S Sreeroop C Sudha Kartha
Photopolymer systems can produce good image quality holograms that does not require any post-processing and are environmentally stable with good diffraction efficiency. The present work reports the development of a methylene blue-sensitized polyvinyl alcohol acrylamide (MBPVA/AA) photopolymer system for recording white light reflection holograms. Reflection gratings were recorded in the photopolymer films with different concentrations of methylene blue (MB). Various parameters affecting the holographic properties of the samples were also studied. The holographic performance of the material is found to depend on its chemical composition and the recording parameters.
Volume 97, 2023
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