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http://dx.doi.org/10.4313/JKEM.2019.32.6.472

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

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)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.32, no.6, 2019 , pp. 472-476 More about this Journal
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.
Keywords
Optical sensor; PLC; Contamination monitoring; Water quality measurement; Flow-cell; FDTD;
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