Pavlova М. V. Russia Yuri Gagarin State Technical University of Saratov, ul. Politechnicheskaya, 77, Saratov, 410054, Russia Assistant professor PhD in physics and mathematicspavlova@sstu.ru Additional info Author's articles WAVE EQUATIONS FOR THE POCKELS EFFECT DESCRIPTION IN CRYSTALS AND THEIR ANALYSIS ON THE EXAMPLE OF LITHIUM NIOBATE