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Karchevskii,\nSolution of the vector eigenmode problem for cylindrical dielectric waveguides based on a nonlocal boundary a condition,\nComput. Math. Math. Phys. 42 (2002), 1012\u20131027."},{"key":"2023033111454390107_j_cmam-2020-0162_ref_005","doi-asserted-by":"crossref","unstructured":"R. Z. Dautov and E. M. Karchevskii,\nError estimates for a Galerkin method with perturbations for spectral problems of the theory of dielectric waveguides,\nLobachevskii J. Math. 37 (2016), no. 5, 610\u2013625.","DOI":"10.1134\/S1995080216050024"},{"key":"2023033111454390107_j_cmam-2020-0162_ref_006","doi-asserted-by":"crossref","unstructured":"R. Z. Dautov and E. M. Karchevskii,\nNumerical modeling of optical fibers using the finite element method and an exact non-reflecting boundary condition,\nComput. Methods Appl. Math. 18 (2018), no. 4, 581\u2013601.","DOI":"10.1515\/cmam-2017-0049"},{"key":"2023033111454390107_j_cmam-2020-0162_ref_007","unstructured":"R. Z. Dautov, E. M. Karchevskii and G. P. 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Nicholls,\nA spectral element method with transparent boundary condition for periodic layered media scattering,\nJ. Sci. Comput. 68 (2016), no. 2, 772\u2013802.","DOI":"10.1007\/s10915-015-0158-5"},{"key":"2023033111454390107_j_cmam-2020-0162_ref_011","doi-asserted-by":"crossref","unstructured":"P. Joly and C. Poirier,\nMathematical analysis of electromagnetic open waveguides,\nRAIRO Mod\u00e9l. Math. Anal. Num\u00e9r. 29 (1995), no. 5, 505\u2013575.","DOI":"10.1051\/m2an\/1995290505051"},{"key":"2023033111454390107_j_cmam-2020-0162_ref_012","doi-asserted-by":"crossref","unstructured":"P. Joly and C. Poirier,\nA numerical method for the computation of electromagnetic modes in optical fibres,\nMath. Methods Appl. Sci. 22 (1999), no. 5, 389\u2013447.","DOI":"10.1002\/(SICI)1099-1476(19990325)22:5<389::AID-MMA31>3.0.CO;2-E"},{"key":"2023033111454390107_j_cmam-2020-0162_ref_013","doi-asserted-by":"crossref","unstructured":"J. B. Keller and D. 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