Abstract
Object of research: Free-space optical communication (FSO).
 Investigated problem: Significant advantages of free-space optical communication in comparison with the existing networks of useful data transmission justify their use in various complex environmental conditions, which require the organization of fast and reliable digital communication when it is impossible or limitation to use wired or radio lines.
 Main scientific results: One of the factors that can considerably affect the FSO efficiency is radioactive radiation produced by various sources and phenomena of ionizing effects. In the research the issues of the assessment of the vulnerability of the FSO receivers of input signal from the effects of gamma radiation are directly considered. The analysis of the design of the receiving path of the input signal of FSO is conducted and the list and the partial attenuation coefficients of radioactive radiation by the FSO components that separate the receiver of input signal from the external environment are determined.
 The area of practical use of research results: The methods has been developed and with its help the assessment of the vulnerability of the FSO receivers of input signal from the effects of gamma radiation, as the effects of the destruction of the radiation-hazardous object has been conducted.
 Innovative technological product: The nature of the influence of gamma radiation as the effects of the destruction of the radiation-hazardous object on the FSO receiver of input signal is determined.
 Scope of application of an innovative technological product: The results allow to develop a set of measures aimed at reducing the effects of gamma radiation, as the effects of the destruction of the radiation-hazardous object, on the FSO efficiency.
Highlights
Materials and Methods The peculiarity of the free-space optical communication (FSO) layout is that the receiver from the back and the sides is protected from gamma radiation by a housing, which is usually made of dense materials and metals [6,7,8,9,10]
The attenuation function of gamma radiation by the elements of the receiving path of FSO is quantified by the attenuation coefficient
(Fig. 2), that in relation to the design variant of FSO is defined as the product of the attenuation coefficient by the front of the FSO receiver
Summary
Problem description Technologies of free-space optical communication (FSO), despite the fundamental disadvantage of this technology – significant dependence of the communication line on external factors, have such advantages as high-speed transmissions, the lack of frequency licensing, the speed of channel. It should be noted that FSO, as a system of technical support for communication of external location, is characterized by vulnerability to the influence of various negative factors and environmental phenomena and man-made impact factors. One of which may be the effect of radioactive radiation produced by various sources and phenomena of ionizing influence. Such sources could be the factors of a nuclear explosion, outer space ionizing radiation, as well as the consequences of the destruction of radiation-hazardous objects in nuclear industry
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