Twenty-Meter Laser Strainmeter "Popova Isl."

This paper describes the design and principle of operation of a 20 m laser strainmeter of unequal-arm type created on the basis of a Michelson interferometer and frequency-stabilized helium-neon laser. The interferometry methods used allow the measurement of the displacement of an Earth's crust...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2024-09, Vol.24 (17), p.5788
Main Authors: Bolsunovskii, Mikhail, Dolgikh, Grigory, Dolgikh, Stanislav, Chupin, Vladimir, Shvets, Viacheslav, Yakovenko, Sergey
Format: Article
Language:English
Subjects:
Accuracy
Atmospheric pressure
Geophysics
Gravitational waves
Humidity
laser strainmeter
Lasers
Michelson interferometer
Observatories
Recording equipment
Steel pipes
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Summary:This paper describes the design and principle of operation of a 20 m laser strainmeter of unequal-arm type created on the basis of a Michelson interferometer and frequency-stabilized helium-neon laser. The interferometry methods used allow the measurement of the displacement of an Earth's crust section on the base of the laser strainmeter with an accuracy of 30 pm in the frequency range from 0 (conventionally) to 1000 Hz. This laser strainmeter, when connected to an accurate time system providing an accuracy of 1 μs, should structurally become a part of the laser interferometric seismoacoustic observatory, consisting of spatially separated laser strainmeters installed in various regions of Russia.
ISSN:1424-8220
1424-8220
DOI:10.3390/s24175788