Abstract
The present work adapts a recent grating theory called “Fast Fourier factorization” to cylindrical coordinates in order to study microstructured optical fibers (MOFs). Compared with the classical differential method, this new differential method takes into account the truncation of Fourier series and the discontinuities of the fields across the diffracting surface with the help of new factorization rules. The main advantage of this method is that the directrix of the diffracting cylindrical surface is arbitrary and permits anisotropic and inhomogeneous media although its numerical application needs longer computation time, compared with other well-known numerical methods. The S-propagation algorithm is used to avoid numerical contaminations. The numerical results are validated and compared with the well-established Multipole method in the case of a MOF with six circular cylinders. Further, a new cross-sectional profile (with sectorial inclusions) that the Multipole method cannot consider is studied.
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Boyer, P., Renversez, G., Popov, E. et al. A New Differential Method Applied to the Study of Arbitrary Cross Section Microstructured Optical Fibers. Opt Quant Electron 38, 217–230 (2006). https://doi.org/10.1007/s11082-006-0005-x
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DOI: https://doi.org/10.1007/s11082-006-0005-x