Browsing by Author "Yumashev, K. V."

Now showing items 21-25 of 25

    • Thermal lensing measurements in the anisotropic laser crystals under diode pumping 

      Loiko, P. A.; Savitski, V. G.; Yumashev, K. V.; Kuleshov, N. V.; Pavlyuk, A. A. (БНТУ, 2012)
      An experimental setup was developed for thermal lensing measurements in the anisotropic di-ode-pumped laser crystals. The studied crystal is placed into the stable two-mirror laser cavity operating at the fundamental transversal mode. The output beam radius is measured with re-spect to the pump intensity for different meridional planes (all these planes contain the light propagation ...Nm.
      2013-02-05

    • Thermo-optic properties of Yb:Lu2O3 single crystals 

      Loiko, P. A.; Yumashev, K. V.; Schödel, R.; Peltz, M.; Liebald, C.; Mateos, X.; Deppe, B. (Springer, 2015)
      A detailed study of thermo-optic properties of 1.5 at.% Yb:Lu2O3 single crystal is performed. Thermo-optic dispersion formulas are derived for dn/dT coefficient and thermal coefficient of the optical path. At the wavelength of 1.03 μm, dn/dT = 5.8 × 10−6 K−1. High-precision temperature-dependent measurements of the thermal expansion coefficient α are performed. At the room ...
      2018-09-17

    • Up- and down-conversion emissions from Er3+ doped K2YF5 and K2YbF5 crystals 

      Loiko, P. A.; Khaidukov, N. M.; Mendez-Ramos, J.; Vilejshikova, E. V.; Skoptsov, N. A.; Yumashev, K. V. (Elsevier, 2016)
      Up- and down-conversion emissions from Er3+ doped K2YF5 and K2YbF5 crystals / P. A. Loiko [et al.] // Journal of Luminescence. – 2016. – Vol. 170. – P. 1-7.
      2016-03-29

    • Use of the Laser Beam Deflection Technique for Thermo-Optic Coefficients Study in Gadolinium-Yttrium Oxyorthosilicate Doped with Erbium Ions 

      Yumashev, K. V.; Goman, V. I.; Pavlovski, L. K.; Hertsova, A. V.; Malyarevich, A. M. (БНТУ, 2023)
      Results of use of the laser beam deflection technique for determination of thermo-optic coefficients (TOCs) of the Er3+-doped gadolinium-yttrium oxyorthosilicate crystal (Er3+:(GdY)2SiO5 – Er:GYSO) are presented. A 0.1 at.% Er-doped gadolinium-yttrium oxyorthosilicate crystal was grown by the Czochralski method under nitrogen atmosphere. Raw materials such as Er2O3, Gd2O3, Y2O3, ...
      2023-12-12

    • Yb3+-doped YVO4 crystal for efficient Kerr-lens mode locking in solid-state lasers 

      Lagatsky, A. A.; Sarmani, A. R.; Brown, C. T. A.; Sibbett, W.; Kisel, V. E.; Selivanov, A. G.; Denisov, I. A.; Troshin, A. E.; Yumashev, K. V.; Kuleshov, N. V.; Matrosov, V. N.; Matrosova, T. A.; Kupchenko, M. I. (Optical Society of America, 2005)
      We report the first demonstration, to our knowledge, of soft-aperture Kerr-lens mode locking in a diode-pumped femtosecond Yb3+:YVO4 laser. Near-transform-limited pulses as short as 61 fs are generated around a center wavelength of 1050 nm with an output power of 54 mW and a pulse repetition frequency of 104.5 MHz. This is, to our knowledge, the shortest pulse generated directly ...
      2012-01-23