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학술지 Design and Analysis of Refractometer Based on Bend Waveguide Structure with Air Trench for Optical Sensor Applications
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저자
류진화, 이우진, 이봉국, 도이미, 이강복, 엄남경, 백규하
발행일
201410
출처
ETRI Journal, v.36 no.5, pp.841-846
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.14.0114.0413
협약과제
14MC4200, 고 신뢰성 해양 센서 노드 및 센싱 요소 기술 개발, 백규하
초록
This study proposes a novel optical sensor structure based on a refractometer combining a bend waveguide with an air trench. The optical sensor is a 1 x 2 splitter structure with a reference channel and a sensing channel. The reference channel has a straight waveguide. The sensing channel consists of a U-bend waveguide connecting four C-bends, and a trench structure to partially expose the core layer. The U-bend waveguide consists of one C-bend with the maximum optical loss and three C-bends with minimum losses. A trench provides a quantitative measurement environment and is aligned with the sidewall of the C-bend having the maximum loss. The intensity of the output power depends on the change in the refractive index of the measured material. The insertion loss of the proposed optical sensor changes from 3.7 dB to 59.1 dB when the refractive index changes from 1.3852 to 1.4452.
키워드
Air trench, Bend waveguide, Integrated refractometer, Optical sensor, Planar lightwave circuit
KSP 제안 키워드
Optical loss, Optical sensors, Output power, Planar lightwave circuit(PLC), Refractive index change, Trench structure, U-bend waveguide, Waveguide Structure, design and analysis, insertion loss, quantitative measurement