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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 22 — Aug. 1, 2006
  • pp: 5614–5620

Measurement of group refractive index wavelength dependence using a low-coherence tandem interferometer

Akiko Hirai and Hirokazu Matsumoto  »View Author Affiliations


Applied Optics, Vol. 45, Issue 22, pp. 5614-5620 (2006)
http://dx.doi.org/10.1364/AO.45.005614


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Abstract

A technique for the measurement of the group refractive index wavelength dependence of optical materials using a low-coherence tandem interferometer and a spectrometer is proposed. Four channeled spectra resulting from interferences of light beams from different pairs of optical paths are used for the calculation of optical path differences. The group refractive index wavelength dependence is calculated from these optical path differences generated from the sample under measurement. No a priori information of the geometric thickness of a sample is required. The wavelength dependence of the group refractive index of the samples BK7 parallel plate of 5.200 and 10.025   mm from 675 to 850   nm is experimentally measured with an accuracy of the order of 10 5 and a repeatability of the order of 10 9 .

© 2006 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.5710) Instrumentation, measurement, and metrology : Refraction
(160.4760) Materials : Optical properties
(260.2030) Physical optics : Dispersion

ToC Category:
Interferometry

History
Original Manuscript: November 29, 2005
Revised Manuscript: February 27, 2006
Manuscript Accepted: February 28, 2006

Citation
Akiko Hirai and Hirokazu Matsumoto, "Measurement of group refractive index wavelength dependence using a low-coherence tandem interferometer," Appl. Opt. 45, 5614-5620 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-22-5614

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