Enhanced seismic sensing based on epoxy waveguide Bragg gratings

Steffen Hessler; Patrick Bott; Stefan Kefer; Maiko Girschikofsky; Bernhard Schmauß; Ralf Hellmann

doi:10.1117/12.2542646

12 November 2019 Enhanced seismic sensing based on epoxy waveguide Bragg gratings

Steffen Hessler, Patrick Bott, Stefan Kefer, Maiko Girschikofsky, Bernhard Schmauß, Ralf Hellmann

Proceedings Volume 11197, SPIE Future Sensing Technologies; 111970Q (2019) https://doi.org/10.1117/12.2542646
Event: SPIE Future Sensing Technologies, 2019, Tokyo, Japan

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.

Citation Download Citation

Steffen Hessler, Patrick Bott, Stefan Kefer, Maiko Girschikofsky, Bernhard Schmauß, and Ralf Hellmann "Enhanced seismic sensing based on epoxy waveguide Bragg gratings", Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970Q (12 November 2019); https://doi.org/10.1117/12.2542646

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