Improving performance of quantum frequency standard with laser pumping
TL;DR: One of the directions of improving performance of quantum frequency standard with laser pumping is considered in this article, where a summary of performance results that make it possible is provided, as well as a comparison of the two methods.
Abstract: One of the directions of improving performance of quantum frequency standard with laser pumping is considered. A summary of performance results that make it possible is provided.
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01 Dec 2019
TL;DR: It has been substantiated that the most rational solution of problems arising from the modernization of active phased antenna arrays is the use of fiber-optical communication systems for transmitting heterodyne signals.
Abstract: The article discusses the problems arising from the modernization of active phased antenna arrays (for example, an increase in the number of transceiver active elements, a decrease in the weight and size of the antenna system, etc.). It has been substantiated that the most rational solution of these problems is the use of fiber-optical communication systems for transmitting heterodyne signals. A new design of the transmit-receive module with a fiber-optic transmission system for an active phased antenna array has been developed. The results of experimental investigations are presented.
22 citations
01 Oct 2019
21 citations
01 Jun 2019
TL;DR: In this article, the design of a magnetic trap for low mass-dimensional microwave frequency standards is presented and the dependencies of the number of photons registered by PMT on magnetic field values are established.
Abstract: The design of a magnetic trap for low mass-dimensional microwave frequency standards is presented. The dependencies of the number of photons registered by PMT on magnetic field values are established. The new algorithm for optical processing has been developed. The comparison of experimental Allan deviation for different designs of microwave frequency standards on 199Hg+ ions has been performed.
20 citations
01 Nov 2019
20 citations
01 Oct 2019
18 citations
References
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TL;DR: A new configuration of the frequency synthesizer for the quantum frequency standard (QFS) on the 133Cs atoms is considered and metrological characteristics of the QFS with the proposed frequency standard are improved.
Abstract: A new configuration of the frequency synthesizer for the quantum frequency standard (QFS) on the 133Cs atoms is considered. Significant advantages of the proposed configuration in comparison with the conventional configuration are demonstrated. The frequency interval of the synthesizer is expanded and the step of frequency tuning is decreased. Spectral characteristics of the output signal of the frequency synthesizer are improved, and the frequency tuning to the neighboring resonance of the spectral line provides tuning of the QFS middle field. The metrological characteristics of the QFS with the proposed frequency standard are improved.
40 citations
"Improving performance of quantum fr..." refers background in this paper
...Mainly FS generates the signal which necessary for optical transition of cesium or rubidium atoms [3, 4]....
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28 Aug 2017
TL;DR: A new design of the frequency synthesis circuitry is presented, based on method of direct digital synthesis, which shows a decrease in the step frequency tuning and significant improvement in the spectral characteristics of the output signal of frequency converter.
Abstract: One of the essential elements of satellite communication system is an atomic clock. The proper operation of this system depends on the performance of atomic clock. In this paper one of the directions of modernization of the rubidium atomic clocks is considered. A new design of the frequency synthesis circuitry is presented. The new design of frequency synthesizer is based on method of direct digital synthesis. Theoretical calculations and experimental research showed a decrease in the step frequency tuning by several orders and significant improvement in the spectral characteristics of the output signal of frequency converter. A range of generated output frequencies is expanded. A summary of performance results of rubidium atomic clock, in particularly Allan variance, achieved to date is also provided.
15 citations
"Improving performance of quantum fr..." refers background in this paper
...Mainly FS generates the signal which necessary for optical transition of cesium or rubidium atoms [3, 4]....
[...]
TL;DR: In this article, the authors demonstrate a new approach to design a compact RF standard based on the transfer of frequency stability of hyperfine transitions in molecular iodine to the stability of a laser cavity length.
Abstract: We demonstrate a new approach to designing a compact RF standard based on the transfer of frequency stability of
hyperfine transitions in molecular iodine to the stability of a laser cavity length. We use frequency doubled Nd:YVO4
laser operating in Kerr lens mode-locked regime and frequency lock it to hyperfine transitions in molecular iodine with
further detecting the beat note signal between longitudinal modes on a fast photodiode. A similar system is used for
estimating the standard Allan deviation of RF signal which is 2.1 x 10-14 at the time 100 s.
2 citations
"Improving performance of quantum fr..." refers background or methods in this paper
...The principal improvement in design of quantum frequency standards (QFS) on beams and pairs of (133)Cs and (87)Rb atoms is the possibility of using laser diodes as sources for pumping and detecting a standard quantum transition [1, 2]....
[...]
...The new design of FS was developed using direct digital synthesis, adapted to the requirements for QFS with laser pumping [1, 2]....
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25 Aug 2016
TL;DR: In this article, the authors discuss the recent advantages in creation of optical space-based frequency standards and observe perspective in the field as well as status of making the laser frequency standard of radio frequency range in ITMO University and recent experiments on launching optical frequency combs in space.
Abstract: We discuss the recent advantages in creation of optical space-based frequency standards. We observe perspective in the field as well as status of making the laser frequency standard of radio frequency range in ITMO University and recent experiments on launching optical frequency combs in space. The most important applications of space-based optical clocks are overviewed.
1 citations
"Improving performance of quantum fr..." refers background or methods in this paper
...The principal improvement in design of quantum frequency standards (QFS) on beams and pairs of (133)Cs and (87)Rb atoms is the possibility of using laser diodes as sources for pumping and detecting a standard quantum transition [1, 2]....
[...]
...The new design of FS was developed using direct digital synthesis, adapted to the requirements for QFS with laser pumping [1, 2]....
[...]