Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Highly sensitive temperature sensor based on etched fiber with thermally expanded core

식각된 열확산 코어 광섬유를 이용한 고감도 온도 센서

  • Kim, Kwang-Taek (Department of Electronics and Optoelectronics, Honam University) ;
  • Song, Hyun-Suk (Department of Electronics and Optoelectronics, Honam University) ;
  • Shin, Eun-Soo (Department of Electronics and Optoelectronics, Honam University) ;
  • Hong, Ki-Bum (Department of Electronics and Optoelectronics, Honam University)
  • 김광택 (호남대학교 전자.광공학부) ;
  • 송현석 (호남대학교 전자.광공학부) ;
  • 신은수 (호남대학교 전자.광공학부) ;
  • 홍기범 (호남대학교 전자.광공학부)
  • Published : 2006.07.30
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Abstract

We have demonstrated a highly sensitive temperature sensor using an etched single mode fiber with a thermally expanded core region. Large core size of thermally expanded core facilitates access to evanescent wave by the wet etching. The etched region was surrounded by a low dispersive external medium with high thermo-optic coefficient. Due to the large difference between the dispersion property of the fiber and that of the external medium, the device reveals a cut-off properties at spectral region. The cut-off wavelength was shifted by the variations of the environmental temperatures because of thermo-optic effect of the external medium. The sensitivity of the fabricated device was found to be $45nm/^{\circ}C$.

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References

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