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Updated: May 18, 2026

Fabrication and Testing of Photonic Thermometers
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Temperature compensated microfiber Bragg gratings.

Shuai Gao1, Long Jin, Yang Ran

  • 1Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.

Optics Express
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

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This study presents a temperature-compensated microfiber Bragg grating (mFBG) using a special liquid. This novel approach significantly reduces thermal sensitivity for more stable optical sensing applications.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Fiber Optics

Background:

  • Microfiber Bragg gratings (mFBGs) are susceptible to temperature fluctuations.
  • Accurate optical sensing requires compensation for thermal effects.

Purpose of the Study:

  • To develop a temperature-compensated microfiber Bragg grating (mFBG).
  • To reduce the thermal sensitivity of mFBGs for enhanced stability.

Main Methods:

  • Utilized a liquid with a negative thermo-optic coefficient.
  • Employed evanescent-field interaction to couple the liquid's refractive index change with the mFBG.
  • Compensated for grating elongation and silica glass index changes.

Main Results:

  • Achieved a reduced thermal sensitivity of 0.67 pm/°C.

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Last Updated: May 18, 2026

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  • Demonstrated a thermal sensitivity 1/15th that of uncompensated mFBGs.
  • Theoretical analysis confirmed temperature insensitivity is achievable with optimized parameters.

    • Conclusions:

    • The proposed method offers a compact and flexible solution for temperature-compensated mFBGs.
    • This technique is promising for advanced optical sensing applications requiring high thermal stability.