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김광택 ( Kwang Taek Kim ),황보승 ( Sueng Hwangbo ),강용철 ( Yong Chul Kang ) 한국센서학회 2004 센서학회지 Vol.13 No.3
We have investigated the optical characteristics of a directional coupler made of a side-polished polarization maintaining fiber in contact with a multimode planar waveguide and its applications as sensors. A device structural condition to achieve the polarization insensitive wavelength response has been presented. The fabricated devices revealed a superior immunity to the bending and the deformation of PM fibers in the input section. It is experimentally shown that the proposed device is suitable for a remote fiber sensor.