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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 24 — Dec. 15, 2005
  • pp: 3314–3316

Precision measurement of the refractive index of air with frequency combs

J. Zhang, Z. H. Lu, and L. J. Wang  »View Author Affiliations

Optics Letters, Vol. 30, Issue 24, pp. 3314-3316 (2005)

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We report an experimental method for high-precision refractive index measurement using a Michelson interferometer setup with a femtosecond optical frequency comb as the light source. We demonstrate this technique by measuring the refractive index of air, under different pressures, inside a 29 m multipass cell. Both spectral and temporal interferograms are recorded. The method has a sensitivity of 6.2×10−9 and a standard error of 7.4×10−8 at fixed parameters (pressure and temperature). The possible variation of the density factor from the Lorentz-Lorenz equation is also discussed.

© 2005 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4530) Instrumentation, measurement, and metrology : Optical constants

ToC Category:
Instrumentation, Measurement, and Metrology

J. Zhang, Z. H. Lu, and L. J. Wang, "Precision measurement of the refractive index of air with frequency combs," Opt. Lett. 30, 3314-3316 (2005)

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