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DS: Fachverband Dünne Schichten

DS 20: Poster

DS 20.9: Poster

Donnerstag, 12. März 2026, 18:30–20:30, P2

Piezoelectric coatings on Fiber Bragg Gratings for electric field measurement — •Florian Schmidbauer and Jens Ebbecke — Technology Campus Teisnach Sensor Technology, Deggendorf Institute of Technology, 94244 Teisnach

Monitoring high-voltage systems is gaining increasing importance. Conventional sensors often rely on electrical components that exhibit cross-sensitivities and require electrical wiring, which can pose a source of interference in certain applications. In addition, the physical dimensions of sensor heads can limit their usability.

An alternative approach employs Fiber Bragg Gratings (FBGs) coated with piezoelectric materials. Through the piezoelectric effect, mechanical deformation of the piezoelectric layer induces strain in the FBG, resulting in a measurable shift of its resonance wavelength. This type of sensor offers several advantages, including electrical passivity, a compact form factor, and the capability for remote and rapid signal interrogation via optical fibers.

This work presents the current progress in the development of such a sensor. Barium Titanate (BaTiO3) was selected as the piezoelectric material due to its high piezoelectric coefficient and more environmentally friendly profile compared to PZT. The coating was successfully applied using two different methods: sol-gel dip coating and pulsed laser deposition. Potential application areas and opportunities for further design optimization are also discussed.

Keywords: Piezoelectric coatings; Electric field measurement; Pulsed Laser Deposition; Sol-Gel; Fiber Bragg Grating