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Information × Registration Number 0200U003542, 0197U015765 , R & D reports Title Development of methods and experimental prototypes of devices which provide the given laser radiation intensity distribution. popup.stage_title Head Svych V.A., Registration Date 06-06-2000 Organization Kharkov National University named after V.N. Karazin popup.description2 A new methods of the intracavity formation of the laser radiation beam with intensity distribution similar to uniform profile in the infrared region of the spectrum are the object of the investigation. The substantion, development, investigation and approbation of the new methods and the experimental devices for the forming of the beams with a quasihomogeneous intensity profile in the lasers, which based on the open and waveguide resonators with nonuniform mirrors are the purpose of this work. Based on the method of the splitting by diffraction and amplification - refraction processes the theoretical model and numerical algorithm of the laser resonator mode forming with an uniform intensity distribution on the output mirror are designed in this work. This mode is received by using the intracavity fourier-transform and phase spatial filter, which placed on one of the resonator mirrors. The results are received by means of the numerical calculation of the resonator mirrors. The res ults are received by means of the numerical calculation of the resonator equations using the method of the succesive approximations with the self-consistent account of the field intensity influence on the active medium amplification at the each iteration. The parameters of the waveguide resonators, which have the semiconfocal geometry and plane-parallel geometry with holes in the mirrors and the output intensity distribution, which contains the extended uniform central regions are found. A novel approach to formation of the intensity distribution with a flat top in the waveguide laser with nonuniform mirrors is described. The matrix procedure for the calculation of the mode characteristics of this waveguide laser is proposed. The results of the SRW can be used in the laser technology, medicine, industrial testing and laboratory investigations of the materials. Product Description popup.authors popup.nrat_date 2020-04-03 Close