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Applied Optics

Applied Optics


  • Vol. 41, Iss. 21 — Jul. 20, 2002
  • pp: 4318–4324

Direct measurement of the group refractive index of air with interferometry between adjacent femtosecond pulses

Yoshihisa Yamaoka, Kaoru Minoshima, and Hirokazu Matsumoto  »View Author Affiliations

Applied Optics, Vol. 41, Issue 21, pp. 4318-4324 (2002)

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The group refractive index of air in laboratory conditions is measured directly between adjacent femtosecond laser pulses by a new interferometry technique. Measurement of the repetition rate of the mode-locked pulse train that gives the maximum amplitude of the interference-signal envelope enables us to determine the group refractive index of air within a standard deviation of 2 × 10-7. This simple method without vacuum reference is attractive for measuring the group refractive index needed for precise distance measurements in open fields.

© 2002 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(140.4050) Lasers and laser optics : Mode-locked lasers
(280.3400) Remote sensing and sensors : Laser range finder
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7100) Ultrafast optics : Ultrafast measurements

Original Manuscript: October 30, 2001
Revised Manuscript: April 10, 2002
Published: July 20, 2002

Yoshihisa Yamaoka, Kaoru Minoshima, and Hirokazu Matsumoto, "Direct measurement of the group refractive index of air with interferometry between adjacent femtosecond pulses," Appl. Opt. 41, 4318-4324 (2002)

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  1. K. Minoshima, H. Matsumoto, “High-accuracy measurement of 240-m distance in an optical tunnel by use of a compact femtosecond laser,” Appl. Opt. 39, 5512–5517 (2000). [CrossRef]
  2. I. Fujima, S. Iwasaki, K. Seta, “High-resolution distance meter using optical intensity modulation at 28 GHz,” Meas. Sci. Technol. 9, 1049–1052 (1998). [CrossRef]
  3. P. E. Ciddor, R. J. Hill, “Refractive index of air: 2. Group index,” Appl. Opt. 38, 1663–1667 (1999). [CrossRef]
  4. Y. S. Galkin, R. A. Tatevian, “The problem of obtaining formulae for the refractive index of air for high-precision EDM,” J. Geodesy 71, 483–485 (1997). [CrossRef]
  5. Y. S. Galkin, R. A. Tatevian, “Influence of resonances on the phase and the group refractive indices of air,” J. Geodesy 71, 680–684 (1997). [CrossRef]
  6. M. J. Downs, K. P. Birch, “Bidirectional fringe counting interference refractometer,” Precis. Eng. 5, 105–110 (1983). [CrossRef]
  7. H. Matsumoto, “Measurement of the group refractive index of air by two-wavelength interferometry,” Opt. Commun. 44, 5–7 (1982). [CrossRef]
  8. Z. Bor, K. Osvay, B. Rá;cz, G. Szabó;, “Group refractive-index measurement by Michelson interferometer,” Opt. Commun. 78, 109–112 (1990). [CrossRef]
  9. B. Edlén, “The refractive index of air,” Metrologia 2, 71–80 (1966). [CrossRef]
  10. R. Muijlwijk, “Update of the Edlén formulae for the refractive index of air,” Metrologia 25, 189 (1988). [CrossRef]
  11. T. Yasui, K. Minoshima, H. Matsumoto, “Stabilization of femtosecond mode-locked Ti:sapphire laser for high-accuracy pulse interferometry,” IEEE J. Quantum. Electron. 37, 12–19 (2001). [CrossRef]
  12. Y. Bitou, A. Hirai, H. Yoshimori, F.-L. Hong, Y. Zhang, A. Onae, K. Seta, “Gauge block interferometer using three frequency-stabilized lasers,” in Recent Developments in Traceable Dimensional Measurements, J. E. Decker, ed., Proc. SPIE4401, 288–297 (2001). [CrossRef]
  13. ISO/DIS 3650, “Geometrical product specification (GPS)—length standards—gauge blocks,” (International Organization for Standardization, Geneva, Switzerland, 1995).

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