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Journal of Physics Conference Series

The use of digital data processing to improve the metrological characteristics of the rubidium frequency standard

Anton Valov, Kseniya Arinushkina, Vadim Vladimirovich Davydov, V. Yu. Rud’

Published Dec 1, 2021• 2 citations
Publisher

Abstract

Abstract The necessity of improving the metrological characteristics of a quantum frequency standard when determining the coordinates of an object on the Earth’s surface or long-term transmission of large amounts of data in satellite communication systems is substantiated. A new algorithm for digital processing of optical signals in the frequency standard is proposed. The results of experimental studies of the metrological characteristics of a quantum frequency standard based on rubidium atoms - 87 are presented

DOI
10.1088/1742-6596/2086/1/012070

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Abstract The necessity of improving the metrological characteristics of a quantum frequency standard when determining the coordinates of an object on the Earth’s surface or long-term transmission of large amounts of data in satellite communication systems is substantiated. A new algorithm for digital processing of optical signals in the frequency standard is proposed. The results of experimental studies of the metrological characteristics of a quantum frequency standard based on rubidium atoms - 87 are presented
The necessity of improving the characteristics of metrological for quantum standard of frequency when determining the coordinates of an object on the Earth’s surface or long-term broadcast of large quantity of data in satellite communication systems justified. A new algorism for digital processing of optical signals in the frequency standard is proposed to obtain information about the accuracy signal with making the method of median filtering. The results a research of experimental a characteristics of metrological for quantum standard of frequency based to rubidium - 87 atoms are presented. It is found that improving the long-term frequency stability by 5% using the new algorithm lower the number of bit errors for a long broadcasting information by at least 3%. Also, the error of determining the coordinates of the object is increased by at least 15%.
The main problems arising during the operation of satellite information systems during the transmission of large amounts of information are considered. It is noted how the disadvantages of the current design of the quantum frequency standard based on rubidium-87 atoms influence the operation of the information transmission system. It is noted that the greatest instabilities during long-term operation of the quantum frequency standard are introduced by processes associated with light shifts in the optical part. Frequency stability decreases, synchronization of time scales of various communication satellites deteriorates. This leads to an increase in the number of errors in the transmission of information. A solution is proposed to improve the metrological characteristics of the rubidium frequency standard. The results of experimental studies of the operation of a satellite information transmission system are presented.
Abstract The article discusses the main disadvantages of the current design of a quantum frequency standard based on rubidium-87 atoms. The main disadvantages of the current design of the quantum frequency standard on rubidium-87 atoms are considered. It is noted that the processes associated with light shifts in the optical part contribute to the greatest instability in the long-term operation of the quantum frequency standard. A solution is proposed to improve the design of the rubidium standard. A forecast for improving its metrological characteristics is presented. The results of experimental investigations are presented.
The necessity of developing a new design for automatic control of the optical signal gain to ensure the stability of the output parameters of the atomic frequency standard (AFS) based on rubidium-87 atoms under various external conditions of its operation is substantiated. This is especially true during the operation of this AFS as part of mobile objects for various purposes. A new scheme for automatic gain control in the optical path of an AFS based on rubidium-87 atoms is presented. The amplifier of the error signal formed on the photodetector for controlling the microwave signal is considered in detail. An experiment was carried out, and its final metrological characteristics were presented for the atomic frequency standard based on rubidium atoms - 87 with automatic gain control. The validity of the developed automatic amplification scheme for the new frequency standard based on rubidium atoms-87 is confirmed.