Applied Physics B

, Volume 106, Issue 4, pp 829–834 | Cite as

A low-finesse Fabry–Pérot interferometer for use in displacement measurements with applications in absolute gravimetry

  • G. D’Agostino
  • L. Robertsson
  • M. Zucco
  • M. Pisani
  • A. Germak
Article

Abstract

A low-finesse Fabry–Pérot interferometer is used to determine long and fast displacements. Two corner cube reflectors form the traveling-wave cavity and one beam splitter couples the input collimated laser beam. Given the retro-directive property of corner cube reflectors, the cavity operates at the edge of stability over an extended scanning range. The in-line scheme with a single fixed optical component makes the proposed interferometer robust and easy to align and use. These characteristics are particularly useful in applications running in noisy environments, such as in on-field absolute gravimetry. Experimental data showing the performances reached in a transportable ballistic gravimeter are also presented.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • G. D’Agostino
    • 1
  • L. Robertsson
    • 2
  • M. Zucco
    • 1
  • M. Pisani
    • 1
  • A. Germak
    • 1
  1. 1.Division of MechanicsIstituto Nazionale di Ricerca Metrologica (INRIM)TorinoItaly
  2. 2.Time DepartmentBureau International des Poids et Mesures (BIPM)Sèvres CedexFrance

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