Paper
15 October 2004 Optical response of reflection polymer Bragg gratings to applied gas pressure
Michael L. Ermold, Adam K. Fontecchio
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Abstract
The effects of positive nitrogen pressure (0psi to 10psi above ambient) on the reflection spectrum of holographic polymer dispersed liquid crystal (H-PDLC) Bragg gratings has been experimentally analyzed showing shifts in Bragg wavelength and peak broadening effects. We have observed a spectral blue-shift in the peak reflection wavelength that occurs with increasing pressure. Using statistical analysis techniques, we have shown that this is a real effect that can be quantified. The spectral dependence on applied pressure is explained by mechanical deformations to the polymer network, which is assumed to behave linearly. These devices have potential usage as optical pressure sensors.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael L. Ermold and Adam K. Fontecchio "Optical response of reflection polymer Bragg gratings to applied gas pressure", Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004); https://doi.org/10.1117/12.566079
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KEYWORDS
Liquid crystals

Polymers

Reflection

Statistical analysis

Sensors

Nitrogen

Fiber Bragg gratings

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