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Information × Registration Number 0307U001635, 0106U001558 , R & D reports Title Intracavity methods of shaping of high-quality laser beams popup.stage_title Формування вищих типів коливань у резонаторах із використанням методу просторової фур'є- фільтрації Head Svich V., Registration Date 17-04-2007 Organization Kharkov National University named after V.N.Karazin popup.description2 The quasioptical waveguide resonators, methods of shaping of the high-order transverse modes in such systems are the object of the investigations. The purpose of work is investigation of methods for shaping the high-order modes in the laser resonators containing waveguide and open parts. The structure of the high-order transverse modes of waveguide resonators in far field is studied analytically in this work. The method of the space Fourier-filtration for selective excitation of single high-order mode with a high degree of discrimination of undesirable modes is proposed and realized. Numerical study of characteristics of some the lowest on losses of transverse modes of the dielectric and metal resonators of the submillimeter laser from the geometrical sizes of mirrors and parameters of the amplitude-stepped filter in the form of the absorptive grooves which allocated in region of the field nulls for selected modes is carried out. Configurations of amplitude-stepped mirrors for shaping of single transverse modes of the higher orders in resonators on the basis of the dielectric and metal waveguides are proposed. Weak influence of the active medium on the spatial characteristics of selected mode is shown. The results of investigations can be used at designing and making waveguide lasers with the defined output profile of intensity, and also wide-range single-mode lasers of a submillimeter wavelength. QUASIOPTICAL WAVEGUIDE RESONATOR, TRANSVERSE MODE SELEC-TION, FREE SPACE PART, DIELECTRIC WAVEGUIDE, METAL WAVEGUIDE, MODAL APPROACH, FIELD SHAPING, AMPLITUDE FILTER, FOURIER-OPTICS Conditions of the report reception: under the contract. V. Karazin Kharkiv National University, Svobody Sq., Kharkiv-77, 61077, Ukraine. Product Description popup.authors popup.nrat_date 2020-04-02 Close