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http://dx.doi.org/10.3807/KJOP.2004.15.1.028

Analysis of side-polished fiber couplers with an intermediate-coupling layer and improvement of their coupling efficiency  

손경락 (한국해양대학교 전파정보통신공학부)
김광택 (호남대학교 광전자공학과)
Publication Information
Korean Journal of Optics and Photonics / v.15, no.1, 2004 , pp. 28-33 More about this Journal
Abstract
An in-line fiber coupler, based on side-polished single-mode fibers covered with an intermediate coupling layer and a planar waveguide, is analyzed by modeling the interaction region as an equivalent multi-layered planar waveguide. The reflectance for the multi-layered structure with and without buffer layer is illustrated as a function of the refractive index and thickness of the overlay waveguides. When the refractive index of the overlay waveguides is greater than that of the fiber core, the conditions for the intermediate coupling layer to increase the power coupling from the fiber to the overlays is also explained. Through the experimental results using a LiNbO$_3$planar waveguide, we show that the theoretical analysis is reasonable and in good agreement with the measured values.
Keywords
side-polished fiber coupler; planar waveguide; comb filter; multi-layered media.;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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[ P.Yeh ] / Optical waves in layered media
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[ 김광택;이소영;손경락;이종훈;송재원;이상재;김시홍;강신원 ] / 한국광학회지   과학기술학회마을