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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
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Multimode fiber tip Fabry-Perot cavity for highly sensitive pressure measurement
1College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China.
Scientific Reports
|March 25, 2017
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.
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.
