Synthesis of beam splitters for polarized radiation

Kotlikov, E.N., Lavrovskaya, N.P., Tropin, A.N.

For Russian citation (Opticheskii Zhurnal):

Котликов Е.Н., Лавровская Н.П., Тропин А.Н. Синтез светоделителей для поляризованного излучения // Оптический журнал. 2025. Т. 92. № 8. С. 72–81. http://doi.org/10.17586/1023-5086-2025-92-08-72-81

Kotlikov E.N. Lavrovskaya N.P., Tropin A.N. Synthesis of beam splitters for polarized radiation [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 8. P. 72–81. http://doi.org/10.17586/1023-5086-2025-92-08-72-81

For citation (Journal of Optical Technology):

Abstract:

Subject of the study. Methods of designing beam splitters for polarized radiation with independent reflection and transmission coefficients for different polarizations of incident radiation based on optical films. Aim of study. Development of a technique for the synthesis of beam splitters for polarized radiation using the FilmAnalysis program. Method. The formulation of the problem of designing multilayer thin-film coatings using an evaluation function with restrictions was used. Using numerical iterative methods of multi-parameter optimization, structures of multilayer thin-film systems for beam splitters were designed. Main results. A method of synthesis of beam splitters has been proposed for polarized radiation in the far infrared region of the spectrum 7–14 µm. Various structures of beam splitters for the infrared range of the spectrum are given. For the operating wavelength of the CO₂ laser (10.6 microns), beam splitters have been synthesized, the difference in reflection and transmission was analyzed for S and P polarizations. Practical significance. The results obtained in the work can be used in the creation of optical and optoelectronic devices for such modern applications as polarization thermal imaging, polarization Fourier interferometry, and in optical paths of laser radiation.

Keywords:

synthesis (design), interference coatings, beam splitting coatings, infrared systems, polarization, transmission, reflection, absorption spectra

OCIS codes: 310.1620, 310.6860

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