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The State primary standard of the unit of length – metre GET 2-2021
https://doi.org/10.32446/0368-1025it.2021-10-3-7
Abstract
The main stages of modernization of the State primary standard of the unit of length are described. The structure of the standard, new laser sources and units are described. The results of research of metrological characteristics of lasers at wavelengths of 633 and 532 nm are presented. The research were carried out by the He–Ne/ආ2 stabilized laser, the unit for measuring the frequency difference of laser radiation sources and the complex of equipment for measurement of laser frequency (wavelength in vacuum) in the wavelength range from 500 to 1050 nm (comb generator). As a result of the research, the main sources of the components of residual systematic error and standard uncertainty (type B), standard deviation and standard uncertainty (type A). The comparative analysis of the metrological characteristics of GET 2-2010 and GET 2-2021 are also given. Thus, it became possible to realize the unit of length at the wavelength of 633 nm with standard deviation of 1,6·10–12 and at the wavelength of 532 nm with standard deviation of 1,3·10–12, and the range of transferring of the unit of length to laser radiation sources and other modern high-precision measuring systems has been expanded. The State primary standard of the unit of length GET 2-2021 has been successfully tested and approved by the order of Rosstandart.
About the Authors
T. P. Akimova
D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Tatiana P. Akimova
St. Petersburg
Y. G. Zackharenko
D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Yuri G. Zackharenko
St. Petersburg
N. A. Kononova
D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Natalia A. Kononova
St. Petersburg
V. L. Fedorin
D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Victor L. Fedorin
St. Petersburg
Z. V. Fomkina
D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Zoya V. Fomkina
St. Petersburg
K. V. Chekirda
D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Konstantin V. Chekirda
St. Petersburg
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Review
For citations:
Akimova T.P., Zackharenko Y.G., Kononova N.A., Fedorin V.L., Fomkina Z.V., Chekirda K.V. The State primary standard of the unit of length – metre GET 2-2021. Izmeritel`naya Tekhnika. 2021;(10):3-7. (In Russ.) https://doi.org/10.32446/0368-1025it.2021-10-3-7
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