Перегляд за автором "Obozna, V. P."

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  • Зображення мініатюри
    Публікація
    Calculation of the Stability of the Fiber Ring Laser with Liquid Crystal Polarization Controllers
    (Sumy State University, 2018) Hnatenko, O. S.; Obozna, V. P.
    To date, with the ultra-short pulse lasers are used in many areas of science and technology, including information technology. The main task of creating such lasers is to provide output radiation with the shortest pulse duration. The shortest duration pulses achieved in fiber ring lasers with nonlinear rotating polarization modes, namely 20 fs. But in such lasers, there are a number of problems: stability of operation and tuning of the mode locking. This is due to the tuning of the mode-locked by rotating the wave plates in space manually.
  • Зображення мініатюри
    Публікація
    Formation of Laser Radiation Pulses for Encoding in Formation
    (Sumy State University, 2018) Obozna, V. P.; Hnatenko, O. S.
    The main purpose of this work is to study the characteristics of the sequence of output pulses and the distances between the peaks of the pulses of the output radiation of a ring fiber femtosecond laser with nonlinear evolution of mode polarization for encoding information on the phase of pulses. An example of coding information for the phase of pulses is figure 1, which shows the pulse sequence corresponding to the number 101010010100 in the binary system, which is 2708 in the decimal system.
  • Зображення мініатюри
    Публікація
    Ring fiber lasers for telecommunication systems
    (Begell House, 2018) Gnatenko, A. S.; Machekhin, Yu. P.; Kurskoy, Yu. S.; Obozna, V. P.; Vasianovych, A. V.
    The goal of this research is to study the interactions between a laser radiation and a liquidcrystal cell and to ensure the mode-locking in a ring fiber laser. In this paper we discuss how a non-linear polarization rotation in ring fiber lasers can be used to achieve the mode-locking. By supplying voltage to a liquid-crystal cell, we studied the polarization behavior both in theory and through experiment. Optical circuit of the ring fiber laser has been suggested.
  • Зображення мініатюри
    Публікація
    The impact of laser radiation on nanoparticles, which using in medical
    (Sumy State University, 2019) Obozna, V. P.; Hnatenko, O. S.
    This paper proposes a method of modified chemotherapy, which consists in the use of nanoparticles of porous silicon. These pores are filled with medicine for chemotherapy.