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Загальна кількість знайдених документів : 3
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Romakh V. V. Determination of Wavelengths Which Correspond to Taken Propagation Constant of Planar Waveguide by Wave Equation Fourier Transform Method [Електронний ресурс] / V. V. Romakh, V. M. Fitio // Proceedings of the International Conference Nanomaterials: Applications and Properties. - 2014. - Vol. 3, no. 1. - С. 01PCSI11-01PCSI11. - Режим доступу: http://nbuv.gov.ua/UJRN/princon_2014_3_1_13
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Fitio V. M. A determination of propagation constants of symmetric planar waveguide modes in a frequency domain [Електронний ресурс] / V. M. Fitio, V. V. Romakh // Semiconductor physics, quantum electronics & optoelectronics. - 2014. - Vol. 17, № 3. - С. 252-255. - Режим доступу: http://nbuv.gov.ua/UJRN/MSMW_2014_17_3_9 In a new method of finding propagation constants of waveguide modes, the Fourier transform to wave equation is used. We change the differential equation by the integral one. Then we represent the latter equation in a discrete form and get the eigenvalue (square propagation constants)/eigenvector (the discrete Fourier transform of appropriate fields of waveguide modes) problem. Usage of symmetry for symmetric planar waveguides allows to expand opportunities of the new method essentially: to reduce the time of numerical calculation almost triply without loss of analysis accuracy or improve calculation accuracy.
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Fitio V. M. Search of mode wavelengths in planar waveguides by using the wave equation Fourier transform method [Електронний ресурс] / V. M. Fitio, V. V. Romakh, Ya. V. Bobitski // Semiconductor physics, quantum electronics & optoelectronics. - 2016. - Vol. 19, № 1. - С. 28-33. - Режим доступу: http://nbuv.gov.ua/UJRN/MSMW_2016_19_1_7 The article describes a numerical method based on Fourier transform for studying propagating optical waves in dielectric planar waveguides. The inverse problem to the known direct one in waveguide investigation is proposed, namely a search of light wavelengths according to taken values of propagation constants. For each constant a set of wavelengths is obtained, among which an input value of wavelength from direct problem exists necessarily. A high accuracy of the method proposed is confirmed by exact values obtained by solution of transcendental dispersion equation. This method is tested on many examples, in particular, for waveguides of different permittivity profiles or for TE and TM modes propagate there.
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