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Acoustic Optical Fiber Sensor Based on Graphene Oxide Membrane.

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Summary

A novel graphene oxide membrane Fabry-Pérot acoustic sensor offers faster fabrication with reduced environmental impact. This wideband sensor demonstrates stable performance up to 90°C, suitable for microphones and structural analysis.

Keywords:
Fabry–Pérot interferometeracoustic sensorfiber optic sensor

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Area of Science:

  • Materials Science
  • Acoustic Engineering
  • Nanotechnology

Background:

  • Graphene-based acoustic sensors offer promising performance but often involve complex and hazardous fabrication.
  • There is a need for acoustic sensing technologies with improved fabrication efficiency and environmental sustainability.

Purpose of the Study:

  • To develop a Fabry-Pérot acoustic sensor utilizing a graphene oxide membrane.
  • To achieve a simplified and faster fabrication process compared to existing graphene sensors.
  • To evaluate the sensor's performance, stability, and potential applications.

Main Methods:

  • Fabrication of a Fabry-Pérot sensor incorporating a graphene oxide membrane.
  • Characterization of the optical cavity and reflected signal amplitude across a 100 nm wavelength range.
  • Testing of the sensor's operational range, signal-to-noise ratio (SNR), and temperature stability up to 90°C.

Main Results:

  • The sensor exhibited a constant reflected signal amplitude of 6.8 ± 0.1 dB.
  • A wideband operation range from 20 to 100 kHz was achieved.
  • A maximum SNR of 32.7 dB was recorded at 25 kHz, with stable performance observed at elevated temperatures.

Conclusions:

  • The developed graphene oxide membrane Fabry-Pérot sensor provides a faster and more environmentally friendly fabrication method.
  • The sensor demonstrates a wideband operation and good thermal stability, making it suitable for acoustic sensing applications.
  • Potential applications include wideband microphones, structural analysis, and imaging systems.