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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 30, Iss. 7 — Mar. 1, 1991
  • pp: 735–744

Interferometric measurement of group and phase refractive index

Mark D. Hopler and John R. Rogers  »View Author Affiliations


Applied Optics, Vol. 30, Issue 7, pp. 735-744 (1991)
http://dx.doi.org/10.1364/AO.30.000735


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Abstract

An experimental apparatus has been designed to measure group refractive index (ng) by observing the shift of the fringe visibility envelope upon insertion of a sample into one arm of a Twyman-Green interferometer. A criterion is developed for the limiting bandwidth and thickness for which good visibility may be expected and for predicting the bandwidth for the narrowest visibility curve. It is demonstrated that the measured group index data can be converted to phase index data with a previously described technique [ RogersJ. R. HoplerM. D., J. Opt. Soc. Am. A 5, 1595– 1600 ( 1988)] to an accuracy of ~0.0006 across the visible spectrum.

© 1991 Optical Society of America

History
Original Manuscript: December 6, 1989
Published: March 1, 1991

Citation
Mark D. Hopler and John R. Rogers, "Interferometric measurement of group and phase refractive index," Appl. Opt. 30, 735-744 (1991)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-30-7-735

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