Two methods for determination of the effective wavenumber of Gaussian beams in absolute gravimeters

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F18%3AN0000006" target="_blank" >RIV/00177016:_____/18:N0000006 - isvavai.cz</a>

Alternative codes found

RIV/00025615:_____/18:N0000038

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Two methods for determination of the effective wavenumber of Gaussian beams in absolute gravimeters

Original language description

This paper presents two methods for evaluation of the effective wavenumber of nearly-Gaussian beams in laser interferometers that can be used for determination of a so called diffraction correction in absolute gravimeters. The first method, that can be simply used in situ, is an empirical procedure based on the evaluation of the variability of g measurements against the amount of light limited by an iris diaphragm and transmitted to a photodetector. However, precision of this method depends on the beam quality similarly as in the case of the conventional method based on measurement of a beam width. The second method, that is more complex, is based on beam profiling in various distances and on calculation of the effective wavenumber using the second spatial derivative of a non-ideal beam field envelope. The measurement results achieved by both methods are presented on an example of two absolute gravimeters and the determined diffraction corrections are compared with the results obtained by measurements of beam width. Agreement of methods within about 1 μGal have been obtained with average diffraction corrections slightly exceeding +2 μGal for three FG5(X) gravimeter configurations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA16-14105S" target="_blank" >GA16-14105S: Advanced processing of absolute gravity measurements and investigation of systematic instrumental effects</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Metrology and Measurement Systems

ISSN

0860-8229

e-ISSN

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Volume of the periodical

25

Issue of the periodical within the volume

4

Country of publishing house

PL - POLAND

Number of pages

13

Pages from-to

701-713

UT code for WoS article

000453624500005

EID of the result in the Scopus database

2-s2.0-85061910103