Direct Measurement of the Group Refractive Index of Air with Interferometry between Adjacent Femtosecond Pulses
Applied Optics, Vol. 41, Issue 21, pp. 4318-4324 (2002)
http://dx.doi.org/10.1364/AO.41.004318
Acrobat PDF (126 KB)
Abstract
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
[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
Citation
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)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-21-4318
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