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Related Experiment Videos

Fiber Bragg grating temperature sensor for practical use

Hirayama1, Sano

  • 1Environmental Technology Laboratory, Fuji Electric Corporate Research and Development, Ltd., Kanagawa, Japan. hirayama-noritomo@fujielectric.co.jp

ISA Transactions
|June 28, 2000
PubMed
Summary
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A new Fiber Bragg Grating (FBG) temperature sensor uses conventional thermocouple housing for easy integration. This practical design ensures reliable temperature measurements up to 250°C with minimal bending loss.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Sensor Technology

Background:

  • Fiber Bragg Gratings (FBGs) offer advanced sensing capabilities but require practical housing for industrial applications.
  • Conventional electrical sensor housings are crucial for easy integration into existing instrumentation systems.
  • Limited research exists on embedding FBG sensors within standard housings, hindering their widespread adoption.

Purpose of the Study:

  • To experimentally fabricate a practical pass-through type FBG temperature sensor.
  • To embed the FBG sensor within a conventional thermocouple housing for enhanced usability.
  • To evaluate the performance and reliability of the developed FBG temperature sensor.

Main Methods:

  • Fabrication of a pass-through type FBG temperature sensor.

Related Experiment Videos

  • Integration of the FBG sensor into a standard stainless steel thermocouple sheath.
  • Utilizing a small radius U-turn fiber with high numerical aperture and polyamide recoating.
  • Experimental characterization of bending loss and heat resistance.

    • Main Results:

    • The developed FBG sensor was successfully embedded in a conventional thermocouple housing.
    • Bending loss of the U-turn fiber was experimentally determined to be less than 0.1 dB.
    • The sensor demonstrated heat resistance up to 250 degrees C.
    • The FBG sensor exhibited a temperature sensitivity of 10.3 pm/degrees C, comparable to general FBGs.

    Conclusions:

    • A practical and easily integrable FBG temperature sensor housed in a conventional thermocouple sheath has been successfully fabricated.
    • The developed sensor exhibits excellent performance characteristics, including low bending loss and high heat resistance.
    • The findings confirm the practical applicability of this novel FBG sensor for various temperature measurement applications.