EXPERIMENTAL CHARACTERISTICS OF AN ATMOSPHERIC-FIBER LASER SYSTEM FOR DETECTING ACOUSTIC INFRASOUND VIBRATIONS IN GEOECOLOGICAL MONITORING TASKS
A.V. Britvin1, S.I. Konyaev1, B.V. Poller1,2, A.B. Poller1, M.S. Khayretdinov2,3
1Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
3Institute of Computational Mathematics and Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: laser monitoring of natural and anthropogenic processes, laser atmospheric lines, frequency standard, infrasound oscillations in the atmosphere, phase fluctuations
Abstract
The problem of measuring the space-time and energy parameters of acoustic infrasound vibrations in the atmosphere based on the placement of laser and fiber lines in geoecological monitoring zones is considered. The measurements are based on the phenomenon of the acousto-optical transformation at infra-low frequencies associated with the influence of an external acoustic wave field on the characteristics of propagation of laser pulse beams in this field. Background and anthropogenic atmospheric acoustic processes are used as external sources of the field. The measured parameter is the phase (frequency) fluctuation atmospheric optical signal relative to the reference optical fiber signal. The characteristics of the atmospheric fiber laser system and some results of experiments aimed at estimating the statistics of phase fluctuations of atmospheric laser pulses and the parameters of infrasound fields in a given atmospheric monitoring zone are presented.
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