Abstract
A thin film light amplifier consisting of a photoconducting (PC) element and an electroluminescent (EL) cell, which are connected in series, was constructed. PC and EL elements were prepared by vacuum evaporation. The time functions of the output signal, in the form of luminance of the light emitted from the electroluminescent cell depending on the input signal (rectangular pulses of the light illuminating the PC element) at alternating voltage supplying the examined system were measured. For high values of feedback coefficient the light amplifier was of bistable character. A mathematical model describing the dynamic properties of this light amplifier using the equivalent circuit method is proposed.
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