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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 26 — Sep. 10, 2009
  • pp: 4909–4916

Resolving fringe ambiguities of a wide-field Michelson interferometer using visibility measurements of a noncollimated laser beam

Xiaoke Wan, Ji Wang, and Jian Ge  »View Author Affiliations


Applied Optics, Vol. 48, Issue 26, pp. 4909-4916 (2009)
http://dx.doi.org/10.1364/AO.48.004909


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Abstract

An actively stabilized interferometer with a constant optical path difference is a key element in long-term astronomical observation, and resolving interference fringe ambiguities is important to produce high-precision results for the long term. We report a simple and reliable method of resolving fringe ambiguities of a wide-field Michelson interferometer by measuring the interference visibility of a noncollimated single-frequency laser beam. Theoretical analysis shows that the interference visibility is sensitive to a subfringe phase shift, and a wide range of beam arrangements is suitable for real implementation. In an experimental demonstration, a Michelson interferometer has an optical path difference of 7 mm and a converging monitoring beam has a numerical aperture of 0.045 with an incidental angle of 17 ° . The resolution of visibility measurements corresponds to 1 / 16 fringe in the interferometer phase shift. The fringe ambiguity-free region is extended over a range of 100 fringes.

© 2009 Optical Society of America

OCIS Codes
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.1088) Instrumentation, measurement, and metrology : Adaptive interferometry

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: June 5, 2009
Manuscript Accepted: July 23, 2009
Published: September 1, 2009

Citation
Xiaoke Wan, Ji Wang, and Jian Ge, "Resolving fringe ambiguities of a wide-field Michelson interferometer using visibility measurements of a noncollimated laser beam," Appl. Opt. 48, 4909-4916 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-26-4909

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