Pulse signal transformation by Fabry-Perot resonator with nonlinear inhomogeneous magnetoresonant filling

The experimental and numerical calculation results of nonlinear properties of quasioptical magnetoresonance structure in nonstationary regime are presented. The theoretical analysis has been carried out for the system of planeparal1e1 paramagnetic layers under the electron spin resonance (ESR) conditions at low temperatures (T 4.2 K).Such space is placed between two plane metal mirrors. The experimental results were Obtained by using a two-mirror quasioptical resonator with the paramagnetic layer inside it. Experiments were carried out in 4-mm wavelength range and at radiophysical low and superlow temperatures T< 1 K. Analytic theoretical studying of the development of the process of paramagnetic resonance absorption taking into account the influence of such spin system on the nonlinear properties of the structure under investigation is presented too. The comparison of experimental results with the theoretical date allows to conclude that we have qualitative agreement of the mathematical model and real situation.