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Related Experiment Video

Updated: Jul 4, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Temperature sensor using an optical fiber coupler with a thin film.

Hairun Guo1, Fufei Pang, Xianglong Zeng

  • 1Key Laboratory of Special Fiber Optics and Optical Access Networks, Shanghai University, Shanghai, China.

Applied Optics
|July 3, 2008
PubMed
Summary

A novel fiber optic temperature sensor was developed using thermosensitive film on a fiber coupler. This simple, stable sensor accurately measures temperatures from -50 to 100°C with high sensitivity.

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Sensor Technology

Background:

  • Fiber optic sensors offer advantages like immunity to electromagnetic interference.
  • Developing compact and sensitive temperature sensors is crucial for various applications.
  • Thermosensitive materials are key components in optical temperature sensing.

Purpose of the Study:

  • To demonstrate and fabricate a novel fiber coupler-based temperature sensor.
  • To investigate the sensing performance of organic-inorganic solgel material for temperature measurement.
  • To simplify the analysis of coated fiber couplers using an equivalent method.

Main Methods:

  • Coating thermosensitive film around a fiber coupler.
  • Simplifying the coated fiber coupler to a conventional one using the multicladding equivalent method.

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  • Characterizing the sensor's response to temperature variations.

    • Main Results:

    • Achieved a temperature measurement range of -50 to 100 degrees C.
    • Observed a resonant wavelength shift of approximately 25 nm.
    • Attained a sensitivity of 0.17 nm/degrees C.

    Conclusions:

    • The developed fiber coupler temperature sensor exhibits good performance.
    • The sensor has a simple structure and is unaffected by light source instability.
    • This sensor is suitable for a wide range of temperature sensing applications.