Applied Physics B

, Volume 106, Issue 4, pp 829–834

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

DOI: 10.1007/s00340-011-4747-1

Cite this article as:
D’Agostino, G., Robertsson, L., Zucco, M. et al. Appl. Phys. B (2012) 106: 829. doi:10.1007/s00340-011-4747-1

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.

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