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Related Experiment Video

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Multimode fiber tip Fabry-Perot cavity for highly sensitive pressure measurement.

W P Chen1, D N Wang2, Ben Xu1

  • 1College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China.

Scientific Reports
|March 25, 2017
PubMed
Summary

We developed a miniature fiber optic sensor using a Fabry-Perot interferometer for high-pressure environments. This robust, low-cost device offers high sensitivity for accurate gas pressure monitoring.

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Area of Science:

  • Optoelectronics
  • Fiber optic sensing
  • Interferometry

Background:

  • Accurate monitoring of gas pressure is crucial in various industrial and environmental applications.
  • Existing sensors may face limitations in size, cost, robustness, or sensitivity for specific high-pressure monitoring tasks.

Purpose of the Study:

  • To demonstrate a novel, miniature fiber optic sensor for gas pressure measurement.
  • To evaluate the sensor's performance characteristics, including sensitivity and cross-sensitivity.

Main Methods:

  • Fabrication of a Fabry-Perot interferometer sensor at the tip of a multimode fiber using ultraviolet adhesive.
  • Utilizing an etched fiber end to create the interferometer cavity.
  • Operating the sensor in a reflection mode for convenient measurement.

Main Results:

  • The developed fiber optic sensor exhibits a miniature size (diameter < 60 μm) and is robust and low-cost.
  • Achieved a high gas pressure sensitivity of -40.94 nm/MPa.
  • Demonstrated a temperature sensitivity of 213 pm/°C within 55-85 °C, with a low temperature cross-sensitivity of 5.2 kPa/°C.

Conclusions:

  • The miniature Fabry-Perot interferometer fiber tip sensor is a promising technology for high-pressure monitoring.
  • Its high sensitivity and low cross-sensitivity make it suitable for demanding environments.
  • The low-cost and robust nature of the device facilitates practical implementation.