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Two methods for determination of the effective wavenumber of gaussian beams in absolute gravimeters
Pálinkáš, Vojtěch

Source: Metrology and measurement systems : 25 (4), s. 701-713 ISSN: 0860-8229

Publication type: článek v odborném periodiku
Extent13 stran

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 the 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, the precision of this method depends on the beam quality similarly as in case of the conventional method based on measurement of 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 the non-ideal beam field envelope. The measurement results achieved by both methods are presented on the example of two absolute gravimeters and the determined diffraction corrections are compared with results obtained by measurements of beam width. Agreement of methods within about 1 µGal have been found with average diffraction corrections slightly exceeding +2 µGal for three FG5(X) gravimeter's configurations.

Citation: PÁLINKÁŠ, Vojtech. Two methods for determination of the effective wavenumber of gaussian beams in absolute gravimeters. Metrology and measurement systems [online]. Polská republika, 2018, 25(4), s. 701-713 [cit. 2019-11-26]. DOI: 10.24425/mms.2018.124876. ISSN 0860-8229. Dostupné z:

The record appears in these collections:
Focus on VÚGTK > VÚGTK Departments > Geodesy and Geodynamics
Focus on VÚGTK > Researchers > Vojtěch Pálinkáš
Documents of VÚGTK > Articles VÚGTK
Focus on VÚGTK > RIV

 Record created 2019-11-26, last modified 2019-12-09

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