Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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A PDMS-Coated Optical Fiber Bragg Grating Sensor for Enhancing Temperature Sensitivity

  • Park, Chang-Sub (Department of Sensor and Display Engineering, Kyungpook National University) ;
  • Joo, Kyung-Il (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Kang, Shin-Won (School of Electronics Engineering, Kyungpook National University) ;
  • Kim, Hak-Rin (School of Electronics Engineering, Kyungpook National University)
  • Received : 2011.09.20
  • Accepted : 2011.10.17
  • Published : 2011.12.25
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Abstract

We proposed a poly-dimethylsiloxane (PDMS)-coated fiber Bragg grating (FBG) temperature sensor for enhancing temperature sensitivity. By embedding the bare FBG in a temperature-sensitive elastomeric polymer, the temperature sensitivity of the proposed structure could be effectively improved by 4.2 times higher than those of the conventional bare-type FBG sensors due to the high thermal expansion coefficient of the PDMS. We analyzed the temperature-sensitivity enhancement effect with the increased Bragg wavelength shift in our structure and dependence on the temperature sensitivity with respect to the cross-section area of the PDMS.

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References

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