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Multicomponent photopolymer systems for volume phase holograms and grating devices.
Applied Optics
|February 19, 2010
Summary
This study introduces novel photopolymer systems for high-resolution holographic devices. By using component mixtures with differing reactivities, researchers achieved significantly enhanced refractive index modulation for advanced grating fabrication.
Area of Science:
- Materials Science
- Optics
- Polymer Chemistry
Background:
- Traditional photopolymer systems for holographic devices often rely on single monomers and density modulation.
- Existing methods have limitations in achieving high refractive index modulation and resolution.
Purpose of the Study:
- To develop novel photopolymer systems for fabricating high-resolution volume phase holograms and grating devices.
- To investigate the advantages of using component mixtures with differing reactivities and polarizabilities.
Main Methods:
- Utilized a mixture of monomers with distinct reactivities and polarizabilities.
- Exploited two-way diffusion during image-forming exposure to create composition modulation.
- Employed an over-all exposure to fix the recorded images.
Main Results:
- Achieved peak-to-peak refractive index differentials as high as 1.5%, significantly exceeding previous reports.
- Demonstrated the ability to create gratings with >3000 lines/mm inside hollow fibers.
- Observed expected band-stop filter response for white light in fabricated devices.
Conclusions:
- Mixtures of components with differing reactivities and polarizabilities offer an advantageous approach for photopolymer holography.
- The developed systems enable the fabrication of high-resolution grating devices with superior refractive index modulation.
- This technique is suitable for creating advanced optical components, including those within micro-cavities.
