Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Measurement of Brillouin Backscattering for Distributed Temperature Sensor Applications

  • Kim, Su-Hwan (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Kwon, Hyung-Woo (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Kwon, Hyun-Ho (Mine Reclamation Corporation) ;
  • Jang, Hang-Seok (Mine Reclamation Corporation) ;
  • Kim, Jee-Hyun (School of Electrical Engineering, College of IT engineering, Kyungpook National University) ;
  • Kang, Shin-Won (School of Electrical Engineering, College of IT engineering, Kyungpook National University)
  • Received : 2010.04.30
  • Accepted : 2010.12.15
  • Published : 2011.01.31
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Abstract

We present measurements of the Brillouin frequency shift in an optical fiber using a 1550 nm distributed feedback laser diode(DFB-LD) as a light source. By modulating the probe light with an electro-optic modulator, we confirm the stimulated Brillouin gain spectrum(BGS) and spontaneous BGS using the coherent detection method. We also confirm the applicability of the technique to distributed temperature sensors that measure the change in Brillouin frequency shift due to temperature variations.

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References

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