Mathematics & Physics 2016, 9(3), 332–337 УДК 621.373:535 Amplification of Light by Molecules with Selectively Oriented States in the Pulsed Electric Field Igor A.Kuzovatov∗ Institute of Mathematics and Computer Science Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041 Russia Vitaliy V. Slabko† Alexey V.Shamshurin‡ Institute of Engeneering Physics and Radio Electronics Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041 Russia Received 30.01.2016, received in revised form 16.03.2016, accepted 19.05.2016 The possibility of inversionless amplification of light by dichroic molecules that can be oriented selectively over states by application of an pulsed electric field is analyzed. <...> The numerical simulation of the orientation process of molecules in the external field is considered. <...> As shown the conditions of inversionless amplification with considering of transition between energetic levels may be implemented. <...> According to quantum gain of light it requires to create the inversion of population of energy levels. <...> However, the power of induced emitted and absorbed radiation is determined not only by the population of energy levels of particles, but also by the probabilities of induced transitions, as well as the number of energy-degenerate states. <...> Therefore, population inversion is generally a particular case in which the emission power exceeds the absorption power and, hence, amplification of light takes place [1]. <...> The possibility of inversionless amplification of light in a system of dichroic molecules se2 and τ0 on gain α is numerically analyzed. <...> The authors have shown that to achieve the inversionless amplification the value of alignment electric field ⃗ ∗kuzovatov@yandex.ru †vslabko49@mail.ru ‡shamshurin.alex@mail.ru ⃝ Siberian Federal University. <...> All rights reserved c – 332 – lectively oriented over states in an external field was considered in [2, 3]. <...> These ideas were subsequently developed by the authors in [4, 5] in which on the basis of the coupled system of kinetic Boltzmann equations for the ground and excited states the effect of the relation between τeff E0 must be close to or above Igor A.Kuzovatov, Vitaliy V. Slabko, Alexey V.Shamshurin Amplification of Light by Molecules . the breakdown threshold of existing environments, where the studied molecules can be placed. <...> However, if the impulse duration of ⃗ liquid increases in some times against the constant field [6]. <...> In this paper we present <...>