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Open AccessArticle

Multipurpose Polymer Bragg Grating-Based Optomechanical Sensor Pad

Applied Laser and Photonics Group, University of Applied Sciences Aschaffenburg, Wuerzburger Straße 45, 63743 Aschaffenburg, Germany
Weber GmbH Pruefzentrum, Wailandtstraße 6, 63741 Aschaffenburg, Germany
Institute of Microwaves and Photonics, University of Erlangen-Nuremberg, Cauerstraße 9, 91054 Erlangen, Germany
Author to whom correspondence should be addressed.
Sensors 2019, 19(19), 4101;
Received: 28 August 2019 / Revised: 17 September 2019 / Accepted: 18 September 2019 / Published: 23 September 2019
(This article belongs to the Special Issue Optomechanical Sensors)
Flexible epoxy waveguide Bragg gratings are fabricated on a low-modulus TPX™ polymethylpentene polyolefin substrate for an easy to manufacture and low-cost optomechanical sensor pad providing exceedingly multipurpose application potentials. Rectangular EpoCore negative resist strip waveguides are formed employing standard UV mask lithography. Highly persistent Bragg gratings are inscribed directly into the channel waveguides by permanently modifying the local refractive indices through a well-defined KrF excimer laser irradiated +1/-1 order phase mask. The reproducible and vastly versatile sensing capabilities of this easy-to-apply optomechanical sensor pad are demonstrated in the form of an optical pickup for acoustic instruments, a broadband optical accelerometer, and a biomedical vital sign sensor monitoring both respiration and pulse at the same time. View Full-Text
Keywords: Bragg grating; EpoCore; TPX; guitar pickup; accelerometer; vital sign sensor Bragg grating; EpoCore; TPX; guitar pickup; accelerometer; vital sign sensor
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Hessler, S.; Bott, P.; Kefer, S.; Schmauss, B.; Hellmann, R. Multipurpose Polymer Bragg Grating-Based Optomechanical Sensor Pad. Sensors 2019, 19, 4101.

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