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Multipurpose Polymer Bragg Grating-Based Optomechanical Sensor Pad.

Steffen Hessler1, Patrick Bott2, Stefan Kefer3

  • 1Applied Laser and Photonics Group, University of Applied Sciences Aschaffenburg, Wuerzburger Straße 45, 63743 Aschaffenburg, Germany. steffen.hessler@th-ab.de.

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Summary
This summary is machine-generated.

Researchers developed a low-cost, flexible optomechanical sensor pad using epoxy waveguide Bragg gratings on a TPX™ substrate. This versatile sensor pad can be used for acoustic instruments, accelerometers, and biomedical vital sign monitoring.

Keywords:
Bragg gratingEpoCoreTPXaccelerometerguitar pickupvital sign sensor

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Sensor Technology

Background:

  • Optomechanical sensors offer versatile applications but often face challenges in manufacturing complexity and cost.
  • Flexible substrates are desirable for creating conformable and easy-to-apply sensor pads.

Purpose of the Study:

  • To develop a low-cost, easily manufactured, and multipurpose optomechanical sensor pad.
  • To demonstrate the sensing capabilities of flexible epoxy waveguide Bragg gratings on a polyolefin substrate.

Main Methods:

  • Fabrication of flexible epoxy waveguide Bragg gratings on a low-modulus TPX™ polymethylpentene polyolefin substrate.
  • Use of standard UV mask lithography to form rectangular EpoCore negative resist strip waveguides.
  • Inscribing Bragg gratings by modifying local refractive indices using KrF excimer laser irradiation with a phase mask.

Main Results:

  • Successfully fabricated flexible epoxy waveguide Bragg gratings on a TPX™ substrate.
  • Demonstrated the sensor pad's versatility through applications including an optical pickup for acoustic instruments.
  • Validated its use as a broadband optical accelerometer and a biomedical vital sign sensor monitoring respiration and pulse simultaneously.

Conclusions:

  • The developed optomechanical sensor pad is easy to manufacture, low-cost, and highly versatile.
  • Flexible epoxy waveguide Bragg gratings on TPX™ substrates show significant potential for diverse sensing applications.
  • The sensor pad offers a promising platform for advanced optomechanical sensing solutions.