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PLC Optical Sensor for Contamination Monitoring on the Flow-Cell in the Water Quality Measurement System

수질 측정용 플로우 셀의 오염 모니터링을 위한 평면광도파로 센서

  • Han, Seung Heon (Optical Lens Research Center, Korea Photonics Technology Institute) ;
  • Kim, Tae Un (Optical Lens Research Center, Korea Photonics Technology Institute) ;
  • Jung, Haeng Yun (Optical Lens Research Center, Korea Photonics Technology Institute) ;
  • Ki, Hyun Chul (Optical Lens Research Center, Korea Photonics Technology Institute) ;
  • Kim, Doo Gun (Optical Lens Research Center, Korea Photonics Technology Institute) ;
  • Kim, Seon Hoon (Optical Lens Research Center, Korea Photonics Technology Institute)
  • 한승헌 (한국광기술원 광학렌즈연구센터) ;
  • 김태언 (한국광기술원 광학렌즈연구센터) ;
  • 정행윤 (한국광기술원 광학렌즈연구센터) ;
  • 기현철 (한국광기술원 광학렌즈연구센터) ;
  • 김두근 (한국광기술원 광학렌즈연구센터) ;
  • 김선훈 (한국광기술원 광학렌즈연구센터)
  • Received : 2019.08.14
  • Accepted : 2019.08.28
  • Published : 2019.11.01

Abstract

We have proposed a novel planar lightwave circuit (PLC) optical sensor to monitor the contamination in a flow-cell where water is continuously supplied through a water quality measurement system. We designed a PLC chip with a V-shape waveguide and the simulated its function as a sensor for monitoring contamination in a flow-cell using a numerical the FDTD (finite-difference time-domain) analysis. A novel cross type of waveguide was introduced to make the PLC chip of the V-shaped waveguide. The fabricated PLC was cut into the cross waveguide. A change in the optical propagation loss of the PLC sensor was observed after immersing the PLC sensor into city water. It was determined that the propagation loss of the PLC sensor was 3 dB at a wavelength of $1.55{\mu}m$ in the city water for 15 days.

Acknowledgement

Supported by : 한국산업기술진흥원

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