Browsing Внеуниверситетские публикации ученых БНТУ by Author "Kuleshov, N. V."

Now showing items 21-26 of 26

    • Spectroscopic and photoluminescence characterization of Eu 3+-doped monoclinic KY(WO4)2 crystal 

      Loiko, P. A.; Dashkevich, V. I.; Bagaev, S. N.; Orlovich, V. A.; Yasukevich, A. S.; Yumashev, K. V.; Kuleshov, N. V.; Dunina, E. B.; Kornienko, A. A.; Vatnik, S. M.; Pavlyuk, A. A. (Elsevier, 2014)
      Monoclinic 2 at% Eu-doped KY(WO4)2 is grown by top-seeded solution growth method. Polarizationresolved absorption and stimulated-emission cross-section spectra are determined for this crystal. Spectroscopic properties of Eu:KY(WO4)2 are modeled within conventional Judd–Ofelt theory, as well as theory of f–f transition intensities for systems with anomalously strong configuration ...
      2016-02-08

    • Spectroscopy and femtosecond laser performance of Yb3+:YAlO3 crystal 

      Kisel, V. E.; Kurilchik, S. V.; Yasukevich, A. S.; Grigoriev, S. V.; Smirnova, S. A.; Kuleshov, N. V. (Optical Society of America, 2008)
      We report what we believe to be the first demonstration of cw and passively mode-locked Yb3+:YAlO3(Yb:YAP) laser operation under diode pumping. Spectroscopic properties of a 0.6 at.%Yb3+-doped YAP single crystal were investigated. Output power up to 1.2 W with slope efficiency of 64.5% in the cw regime and 225 fs pulse duration with average power of 0.8 W from a mode-locked Yb:YAP ...
      2012-01-23

    • Spectroscopy of tetragonal Eu:NaGd(WO4)2 crystal 

      Loiko, P. A.; Vilejshikova, E. V.; Mateos, X.; Serres, J. M.; Dashkevich, V. I.; Orlovich, V. A.; Yasukevich, A. S.; Kuleshov, N. V.; Yumashev, K. V.; Grigoriev, S. V.; Vatnik, S. M.; Bagaev, S. N.; Pavlyuk, A. A. (2016)
      We report on growth and detailed spectroscopic study of Eu3ю-doped tetragonal sodium gadolinium double tungstate, Eu:NaGd(WO4)2, a new promising crystal for deep-red lasers. Large-volume crystal doped with 4.9 at.% Eu is grown by Czochralski method along the [001] crystallographic direction. Absorption of Eu3ю ions is studied at room temperature (RT) and at 6 K. For the absorption ...
      2017-11-18

    • Thermal lens study in diode pumped Ng- and Np-cut Nd:KGd(WO4)2 laser crystals 

      Loiko, P. A.; Yumashev, K. V.; Kuleshov, N. V.; Savitski, V. G.; Calvez, S.; Burns, D.; Pavlyuk, A. A. (Optical Society of America, 2009)
      A comparative study of thermal lensing effect in diode laser pumped Ng- and Np-cut Nd:KGd(WO4)2 (KGW) laser crystals was performed for laser emission polarized along the principle refractive axis, Nm. The thermal lens in the Ng-cut Nd: KGW was found to be weakly astigmatic with a positive refractive power for both the Nm- and Np-directions. For Np -cut Nd:KGW, strong astigmatism ...
      2012-01-24

    • Ultrafast laser inscribed Yb:KGd(WO4)2 and Yb:KY(WO4)2 channel waveguide lasers 

      Bain, F. M.; Lagatsky, A. A.; Thomson, R. R.; Psaila, N. D.; Kuleshov, N. V.; Kar, A. K.; Sibbett, W.; Brown, C. T. A. (Optical Society of America, 2009)
      We demonstrate laser action in diode-pumped microchip monolithic cavity channel waveguides of Yb:KGd(WO4)2 and Yb:KY(WO4)2 that were fabricated by ultrafast laser writing. The maximum output power achieved was 18.6 mW with a threshold of approximately 100 mW from an Yb:KGd(WO4)2waveguide laser operating at 1023 nm. The propagation losses for this waveguide structure were measured ...
      2012-01-23

    • 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