Applied Technologies and Innovations

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Volume 9
Issue 2
Online publication date 2013-06-06
Title Temperature restrictions at generation of the second harmonica of powerful lasers in periodically polarized gradient crystals of LiNbO3
Author V. Galutskiy, E. Stroganova, Alexey Kozin, S. Shmargilov, N. Yakovenko
Abstract The research examines the possibility of increasing of Periodically poled lithium niobate (PPLN) converters efficiency due to application of gradient nonlinear and optical environments. Use efficiency for radiation transformation of the powerful continuous PPLN lasers made of gradient niobate lithium crystals, can be several times higher, than PPLN made of uniform traditional optically niobate lithium crystals. However, such high efficiency values of transformation are observed at gradient PPLN in more limited interval of rating capacities, than at PPLN made of optically uniform niobate lithium crystals because of possibility of nonlinear change of interacting waves phases difference.
Dmitriev, V. G., Tarasov L. B., 2014. Applied nonlinear optics [in Russian], Moscow: Fizmathlit
Galutskiy, V. V., Stroganova E. V., Yakovenko N. A., 2011. "Spectral separation of Cr3 optical centers in stoichiometric magnesium-doped lithium niobate crystal," Optics and Spectroscopy [in Russian], Vol.110: 436-442
Galutskiy, V. V., Vatlina, M. I., Stroganova, E. V., 2009. "Growth of single crystal with a gradient of concentration of impurities by the Czochralski method using additional liquid charging," Journal of Crystal Growth, Volume 311, Issue 4: 1190-194.
Kolker D. B., Dmitriev A. K., Gorelick P., Wong F., Zondi J. J., 2009. "Cascade mode of frequency generation in an optical parametric generator," Quantum Electronics [in Russian], Vol.39(5): 431-434.
Louchev, O.A., Yu Nan Ei, Kurimura Sunao, and Kitamura K., 2005. "Nanosecond Pulsed Laser Energy and Thermal Field Evolution During Second Harmonic Generation in Periodically Poled Linbo3 Crystals," Applied of Physics Letters, Vol.87, 131101.
Pavel N., Shoji I., and Taira T., Mizuuchi K., Morikawa A., Sugita T., and Yamamoto K., 2004. "Room-temperature, continuous-wave 1-W green power by single-pass frequency doubling in a bulk periodically poled MgO:LiNbO3 crystal," Optics Letters, Vol.29(8): 830-832.
Schlarb U., Betzler K., 1994. "A generalized Sellmeier equation for the refractive indices of lithium niobate," Ferroelectrics, Vol.156: 99-104.
Zhao H., Sukhoy K., Lima Jr. I.T., and Major A., 2012. "Generation of green second harmonic with 60% conversion efficiency from a Q-switched microchip laser in MgO:PPLN crystal," Laser Phys. Lett. 9 355.
Keywords PPLN, gradient crystal, lithium niobate
Pages 53-58
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