Phase-shifted laser feedback interferometry

Ben Ovryn, James H. Andrews

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

We have introduced the techniques of phase-shifting interferometry into a laser feedback interference microscope based on a helium-neon laser. With moderate feedback, multiple reflections between the sample and the laser are shown to be negligible, and the interferometer responds sinusoidally with a well-characterized fringe modulation. One can obtain higher signal-to-noise ratios by determining the number of additional terms required for modeling the effect of multiple reflections on the phase and visibility measurements in the high-feedback regime. Changes in optical path length are determined with nanometer precision without phase averaging or lock-in detection.

Original languageEnglish (US)
Pages (from-to)1078-1080
Number of pages3
JournalOptics Letters
Volume23
Issue number14
StatePublished - Jul 15 1998
Externally publishedYes

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interferometry
helium-neon lasers
lasers
optical paths
visibility
signal to noise ratios
interferometers
microscopes
interference
modulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Ovryn, B., & Andrews, J. H. (1998). Phase-shifted laser feedback interferometry. Optics Letters, 23(14), 1078-1080.

Phase-shifted laser feedback interferometry. / Ovryn, Ben; Andrews, James H.

In: Optics Letters, Vol. 23, No. 14, 15.07.1998, p. 1078-1080.

Research output: Contribution to journalArticle

Ovryn, B & Andrews, JH 1998, 'Phase-shifted laser feedback interferometry', Optics Letters, vol. 23, no. 14, pp. 1078-1080.
Ovryn B, Andrews JH. Phase-shifted laser feedback interferometry. Optics Letters. 1998 Jul 15;23(14):1078-1080.
Ovryn, Ben ; Andrews, James H. / Phase-shifted laser feedback interferometry. In: Optics Letters. 1998 ; Vol. 23, No. 14. pp. 1078-1080.
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