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Linear response deviations during recording of diffraction gratings in photopolymers
1Dpto. Física, Ing. Sistemas y Ta de Señal, Universidad de Alicante. Apdo. 99, 03080 Alicante, Spain. mos@ua.es
Optics Express
|August 6, 2009
Summary
Holographic recording requires linear diffraction efficiency for optimal sensitivity and reproducibility. Deviations, like a lower first maximum in thick photopolymers, are explained by dye concentration and polymer chain molecular weight.
Area of Science:
- Photopolymer science
- Holographic data storage
Background:
- Holographic recording relies on photopolymers for efficient data storage.
- Reproducibility and sensitivity are key performance metrics in holographic media.
Purpose of the Study:
- To investigate deviations from ideal linear diffraction efficiency in photopolymers.
- To explain the phenomenon of reduced first diffraction maximum in thick holographic materials.
Main Methods:
- Analysis of diffraction efficiency versus energetic exposure curves.
- Hypothesizing the role of dye concentration and polymer molecular weight.
Main Results:
- Observed deviations in photopolymers, particularly a lower first diffraction maximum than the second.
- This effect is contrary to expected overmodulation behavior.
Conclusions:
- Dye concentration and polymer chain molecular weight are hypothesized as primary factors influencing holographic recording deviations.
- Understanding these factors is crucial for optimizing photopolymer performance.
