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Proceedings Paper

Enhanced seismic sensing based on epoxy waveguide Bragg gratings
Author(s): Steffen Hessler; Patrick Bott; Stefan Kefer; Maiko Girschikofsky; Bernhard Schmauß; Ralf Hellmann
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Paper Abstract

We report on the fabrication process and the application potential of epoxy-based waveguide Bragg grating sensors on low-modulus polymer substrates for low-cost environmental seismic sensing purposes. EpoCore photoresist channel waveguides are fabricated on a highly flexible TPX polymethylpentene polyolefin substrate by means of standard i-line photolithography. Bragg gratings are permanently inscribed into the strip waveguides by KrF excimer laser irradiation using commercially available phase masks. From these raw sensor chips, a linear accelerometer sensitivity of 107 pm/g in a broadband detection range of at least 0.025 – 15 g could be observed. The enhanced seismic sensing capabilities of the Bragg grating sensor scheme are demonstrated by the use of a simple spring mass system.

Paper Details

Date Published: 12 November 2019
PDF: 5 pages
Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970Q (12 November 2019); doi: 10.1117/12.2542646
Show Author Affiliations
Steffen Hessler, Univ. of Applied Sciences Aschaffenburg (Germany)
Patrick Bott, Weber GmbH Prüfzentrum (Germany)
Stefan Kefer, Univ. of Applied Sciences Aschaffenburg (Germany)
Maiko Girschikofsky, Univ. of Applied Sciences Aschaffenburg (Germany)
Bernhard Schmauß, Univ. of Erlangen-Nuremberg (Germany)
Ralf Hellmann, Univ. of Applied Sciences Aschaffenburg (Germany)

Published in SPIE Proceedings Vol. 11197:
SPIE Future Sensing Technologies
Masafumi Kimata; Christopher R. Valenta, Editor(s)

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