Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Optical Current Sensors Based on Polarization Rotated Reflection Interferometry

편광회전 반사간섭계를 이용한 광전류센서

  • Jang, Ji-Hyang (School of Electrical Engineering, Pusan National University) ;
  • Chu, Woo-Sung (School of Electrical Engineering, Pusan National University) ;
  • Kim, Hoon (School of Electrical Engineering, Pusan National University) ;
  • Seo, Jun-Kyu (School of Electrical Engineering, Pusan National University) ;
  • Kim, Kyung-Jo (School of Electrical Engineering, Pusan National University) ;
  • Kim, Jun-Whee (School of Electrical Engineering, Pusan National University) ;
  • Oh, Min-Cheol (School of Electrical Engineering, Pusan National University)
  • Received : 2010.05.03
  • Accepted : 2010.07.22
  • Published : 2010.08.25
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Abstract

Fiber optic current sensors based on polarization-rotated reflection interferometry are demonstrated by incorporating them into polymeric optical waveguide components, including polarization-maintaining 3-dB couplers, TE-pass waveguide polarizers, and thermooptic phase modulators. To remove the bending induced birefringence, optical fiber coil is annealed at $850^{\circ}C$ for 24 hours. The reflection interferometry comprising polymer waveguide devices exhibit a highly stable output signal corresponding to the flowing current.

폴리머 광도파로를 기반으로 제작된 편광유지 3-dB 방향성 광분배기, 편광기, 위상 변조기 등의 광부품들을 이용하여 편광 회전 반사 간섭계형 광섬유 전류 센서를 제작하였다. 광섬유 전류센서를 위해 필요한 상기 광부품들을 개별적으로 설계 및 제작하여 특성을 확인하였으며, 전류 측정을 위해 사용되는 광섬유 센서 코일에서 발생되는 스트레인에 의한 복굴절을 제거하기 위하여 $850^{\circ}C$의 온도에서 24시간 동안 열처리를 실시하였다. 완성된 반사 간섭계형 광섬유 전류 센서를 이용하여 전선에 흐르는 전류의 크기를 측정하는 실험을 수행하였으며 전류의 양에 비례하는 안정적인 응답 특성을 확인하였다.

Keywords

References

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