Lennart Robertsson 2007 Metrologia 44 35 doi:10.1088/0026-1394/44/1/005
Lennart Robertsson
Show affiliationsThe field distribution of a Gaussian light beam introduces additional space-dependent phase shifts compared with that of a flat wave front. An expression for these phase corrections is derived for the case of a two-beam interferometer. The contribution from these diffraction-induced shifts to the g-value determined in absolute gravimetry is calculated. It is found that in the case of a beam waist of a few millimetres or smaller and, particularly, for unbalanced interferometers, a careful consideration of this effect is crucial if high accuracy is desired.
42.62.Eh Metrological applications; optical frequency synthesizers for precision spectroscopy
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation
Issue 1 (February 2007)
Received 11 April 2006
Published 2 January 2007
Lennart Robertsson 2007 Metrologia 44 35
W Huang 2005 Nonlinearity 18 1375
Ugo Amaldi and Gerhard Kraft 2005 Rep. Prog. Phys. 68 1861
S Y Tong and Huasheng Wu 2002 J. Phys.: Condens. Matter 14 1231
Yuan H Guan et al 2004 Smart Mater. Struct. 13 1230
Thomas S Duffy 2005 Rep. Prog. Phys. 68 1811
S Velasco et al 1993 Eur. J. Phys. 14 166
E Pickwell et al 2004 Phys. Med. Biol. 49 1595
M R Koblischka et al 1997 Supercond. Sci. Technol. 10 693
Guy Ratel 2007 Metrologia 44 S102