OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 44, Iss. 21 — Jul. 20, 2005
  • pp: 4510–4512

Phase-shifting (Sagnac) interferometer with external phase control

José A. Ferrari and Eugenio Garbusi  »View Author Affiliations

Applied Optics, Vol. 44, Issue 21, pp. 4510-4512 (2005)

View Full Text Article

Acrobat PDF (199 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A novel ring configuration for phase-shifting interferometry with external phase-shifting control is presented. The device is a polarization (ring) interferometer, in which the reference and test arms are parts of the same collimated beam. The key point is to manage the polarization of the light such that orthogonal linear polarizations describe counterpropagating paths in the ring interferometer. The phase shift between the two waves is externally controlled with a Pockels cell, which permits fast phase modulation without the need for moving parts inside the interferometer.

© 2005 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(350.5030) Other areas of optics : Phase

José A. Ferrari and Eugenio Garbusi, "Phase-shifting (Sagnac) interferometer with external phase control," Appl. Opt. 44, 4510-4512 (2005)

Sort:  Author  |  Year  |  Journal  |  Reset


  1. J. E. Greivenkamp and J. H. Bruning, "Phase-shifting interferometry," in Optical Shop Testing, D. Malacara, ed., 2nd ed. (Wiley, 1992), pp. 501-598.
  2. M. Kujawinska, "Spatial phase measurement methods," in Interferogram Analysis, D. Robinson and G. Reid, eds. (IOP Publishing, 1993), Sec. 5.3.
  3. E. M. Frins, W. Dultz, and J. A. Ferrari, "Polarization shifting method for step interferometry," Pure Appl. Opt. 7, 53-60 (1998). [CrossRef]
  4. J. A. Ferrari, E. M. Frins, C. D. Perciante, and A. Dubra, "Robust one-beam interferometer with phase-delay control," Opt. Lett. 7, 1272-1274 (1999).
  5. J. Bruning, J. Gallagher, D. Rosenfeld, D. White, D. Brangaccio, and D. Herriot, "Digital wavefront measuring interferometer for testing optical surfaces and lenses," Appl. Opt. 13, 2693-2703 (1974).
  6. H. Schreiber and J. Schwider, "Lateral shearing interferometer based on two Ronchi phase gratings in series," Appl. Opt. 36, 5321-5324 (1997).
  7. J. Schwider, R. Burow, K.-E. Elssner, J. Grzanna, R. Spolaczyk, and K. Merkel, "Digital wave-front measuring interferometry: some systematic error sources," Appl. Opt. 22, 3421-3432 (1983).
  8. J. A. Ferrari and E. M. Frins, "One-beam interferometer by beam folding," Appl. Opt. 41, 5313-5316 (2002).
  9. J. A. Ferrari, E. Garbusi, and E. M. Frins, "Modified Michelson interferometer with electrooptic phase control," Opt. Commun. 209, 245-253 (2002). [CrossRef]
  10. M. V. Mantravadi, "Lateral shearing interferometers," in Optical Shop Testing, D. Malacara, ed., 2nd ed. (Wiley, 1992), pp. 123-172.
  11. C.-P. Cherng, Th. C. Salvi, M. Osifiski, and J. G. McInerney, "Near field wavefront measurements of semiconductor laser arrays by shearing interferometry," Appl. Opt. 29, 2701-2706 (1990).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited