Abstract
The coupling characteristics of a novel kind of directional couplers composed by two parallel non-conventional waveguides are theoretically analyzed in details.The coupling length as a function of the operating wavelength and their optical and geometrical parameters are determined by an efficient frequency domain finite element method. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:949–951, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27489
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