Comparison of different polymers and printing technologies for realizing flexible optical waveguide Bragg grating strain sensor foils

J. Missinne; M-A. Mattelin; N. Teigell Beneitez; G. Van Steenberge

doi:10.1117/12.2506261

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27 February 2019 Comparison of different polymers and printing technologies for realizing flexible optical waveguide Bragg grating strain sensor foils

J. Missinne; M-A. Mattelin; N. Teigell Beneitez; G. Van Steenberge

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Proceedings Volume 10915, Organic Photonic Materials and Devices XXI; 109150I (2019) https://doi.org/10.1117/12.2506261
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Waveguides with Bragg gratings realized on a flat polymer foil are promising candidates for advanced strain sensors since such a planar approach allows precise positioning of multiple sensors in various well-defined directions, in the same foil. As such, an optical version of an electrical strain gage can be realized. Herein, several parameters are discussed which define the behaviour of such sensor foils, in particular the grating design, including the wavelength of operation and mechanical and optical properties of the used polymers. Epoxy and Ormocer®-based Bragg grating sensors operating at 850 nm and 1550 nm wavelength were realized using nano-imprint lithography and laser direct-write lithography and their strain and temperature sensitivities were compared. Finally, it is demonstrated that optical strain gage rosettes can be realized by multiplexing 3 angularly displaced sensors in the same waveguide on a single foil.

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J. Missinne, M-A. Mattelin, N. Teigell Beneitez, and G. Van Steenberge "Comparison of different polymers and printing technologies for realizing flexible optical waveguide Bragg grating strain sensor foils", Proc. SPIE 10915, Organic Photonic Materials and Devices XXI, 109150I (27 February 2019); https://doi.org/10.1117/12.2506261

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