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Numerical analysis of a fiber connected to an inhomogeneous embedded waveguide with rectangular cross‐section
Author(s) -
Momoda M.,
Miyamoto T.,
Yasumoto K.
Publication year - 2003
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.11273
Subject(s) - waveguide , fourier series , transverse plane , eigenvalues and eigenvectors , microwave , optics , fourier transform , cross section (physics) , physics , optical fiber , boundary value problem , section (typography) , refractive index , fiber , mathematical analysis , mathematics , materials science , engineering , computer science , quantum mechanics , structural engineering , composite material , operating system
The Fourier series expansion method is applied to realize an accurate full‐vectorial analysis of the problem of a step‐index optical fiber connected to an inhomogeneous embedded optical waveguide with rectangular cross section, using periodic boundary conditions in both transverse directions. Using this method, the Maxwell's equations in the waveguide system are reduced to a simple eigenvalue problem of a linear system for the Fourier coefficients. Then the behavior of the transmitted and reflected powers of the guided and radiation modes is clarified for each gap distance and transverse shift between the two waveguides, and compared with the cases of the homogeneous embedded waveguide and different transverse refractive index variations. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 14–18, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11272