Operation features of a brightness amplifier in the bistatic scheme of a laser monitor
N.A. Vasnev1, M.V. Trigub1, G.S. Evtushenko2,3
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634055, Russia
2Prokhorov General Physics Institute, Russian Academy of Sciences, 119991, Moscow, Vavilov Str., 38
3National Research Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk, 634050, Russia
Keywords: лазерный монитор, бистатическая схема лазерного монитора, активная фильтрация, визуализация, усилители яркости, коэффициент усиления, удаленные объекты, laser monitor, bistatic scheme of a laser monitor, active filtration, imaging, brightness amplifiers, gain, remote objects
Abstract
The effect of the brightness amplifier operation mode on images obtained by means of a bistatic laser monitor, an active optical system with a two laser active elements, is investigated. The possibility of imaging the remote objects (more than 5 m) by means of this scheme of laser monitor has been evaluated. It is shown that a change in the concentration of the active substance (copper bromide) of the amplifier significantly affects the amplification of the input signal. The active substance temperature rise in the range from 480 to 550 °C leads to an increase in the gain over the entire input level range. A further increase in the temperature (570 °C) increases the gain at a relatively small input signal (less than 100 mW). The resulting amplification characteristics of the active optical system are described and compared with the parameters of the images (distortion, brightness).
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