Open AccessP5.5 - Optical Bragg Gratings in Inorganic-Organic Hybrid Polymers for Highly Sensitive Temperature Measurements
Author(s) -
Maiko Girschikofsky,
Stefan Belle,
Ralf Hellmann,
Michael Förthner,
L. Frey,
Mathias Rommel,
R. Fader
Publication year - 2015
Publication title -
proceedings sensor 2015
Language(s) - English
Resource type - Conference proceedings
DOI - 10.5162/sensor2015/p5.5
Subject(s) - materials science , polymer , fiber bragg grating , optoelectronics , optical materials , phosfos , optics , composite material , fiber optic sensor , plastic optical fiber , physics , wavelength , fiber
We report on the fabrication of an optical sensor based on channel waveguide Bragg gratings in precured inorganic-organic ORMOCER® hybrid-polymer substrates. The particular combination of the optical component and chosen substrate lead to a planar structure with ideal characteristics for highly sensitive temperature measurements. The resulting sensor element shows a linear dependence between temperature and sensor signal with a markedly high sensitivity of up to 294 pm K-1, a thirtyfold higher sensitivity as compared to commonly used silica based fiber Bragg gratings. For the applied interrogation system this sensitivity corresponds to a notable resolution of 20 mK for temperature recordings