• In-band pumped room-temperature Er:KY(WO4)2 laser emitting around 1:6 mm 

    Gorbachenya, K. N.; Kisel, V. E.; Yasukevich, A. S.; Pavlyuk, A. A.; Kuleshov, N. V. (Maik Nauka-Interperiodica Publishing, 2013)
    We present efficient continuous-wave operation of an Er:KY(WO 4)2 crystal under in-band pumping by a compact diode-pumped Er, Yb:GdAl3(BO3)4 laser. Maximum slope efficiency of 27% and output power of 35 mW at 1609.5 nm were obtained with beam propagation factor M2 < 1:2. Absorption and stimulated emission cross-section spectra, as well as the radiative lifetime of the 4I13=2 ...
  • Influence of the meridional flow and thermomagnetic convection on characteristics of magnetic fluid seal 

    Krakov, M. S.; Nikiforov, I. V. (Maik Nauka-Interperiodica Publishing, 2011)
    For the low-speed magnetic fluid seals, the influence of the meridional flow, induced by the shaft rotation, on the distribution of magnetic particles concentration, is studied. Influence of the thermomagnetic convection on the structure of this flow and on the temperature distribution in high-speed magnetic fluid seals is investigated also. The problems were examined by numerical ...
  • Thermoconvective flow velocity in a high-speed magnetofluid seal after it has stopped 

    Krakov, M. S.; Nikiforov, I. V. (Maik Nauka-Interperiodica Publishing, 2012)
    Convective flow is investigated in the high-speed (linear velocity of the shaft seal is more than 1 m/s) magnetofluid shaft seal after it has been stopped. Magnetic fluid is preliminarily heated due to viscous friction in the moving seal. After the shaft has been stopped, nonuniform heated fluid remains under the action of a high-gradient magnetic field. Numerical analysis has ...