Interferometric measurement of group and phase refractive index
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 [J. R. Rogers and M. D. Hopler, J. Opt. Soc. Am. A 5, 1595–1600 (1988)] to an accuracy of ∼0.0006 across the visible spectrum.
© 1991 Optical Society of America
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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