title: Polymer planar Bragg grating sensor for static strain measurements.
abstract: We report on a new optical strain sensor based on a polymer planar Bragg grating (PPBG). The sensor consists of commercially available bulk Polymethlymethacrylate with a UV-inscribed optical waveguide as well as a Bragg grating, both of which are fabricated simultaneously in a single writing step. Upon axial strain, the Bragg wavelength reveals a quasi-instantaneous spectral red shift that depends linearly on the mechanical load with a sensitivity of 2.95 pm/με. The relative reflected intensity of the PPBG remains constant in the investigated load region.
authors: Applied Laser and Photonics Group, University of Applied Sciences Aschaffenburg, Aschaffenburg 63743, Germany. manuel.rosenberger@h‑ab.de
authors: M
authors: M
authors: Rosenberger
authors: G
authors: G
authors: Koller
authors: S
authors: S
authors: Belle
authors: B
authors: B
authors: Schmauss
authors: R
authors: R
authors: Hellmann