TY CONF TI New possibilities of parametric frequency converters of laser emission in oxide nonlinear crystals KW nonlinear crystal KW nonlinear crystal sign KW parametric frequency conversion KW terahertz range. JO XVII International conference on pulsed lasers and laser applications – AMPL-2025 AU Andreev, Y.M. AU Vybornov, P.V. AU Koh, K.A. PY 2025 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences