Real-time compensation of the refractive index of air in distance measurement

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A two-color scheme of heterodyne laser interferometer is devised for distance measurements with the capability of real-time compensation of the refractive index of the ambient air. A fundamental wavelength of 1555 nm and its second harmonic wavelength of 777.5 nm are generated, with stabilization to the frequency comb of a femtosecond laser, to provide fractional stability of the order of 3.0 x 10(-12) at 1 s averaging. Achieved uncertainty is of the order of 10(-8) in measuring distances of 2.5 m without sensing the refractive index of air in adverse environmental conditions.
Publisher
OPTICAL SOC AMER
Issue Date
2015-10
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.23, no.20, pp.26377 - 26385

ISSN
1094-4087
DOI
10.1364/OE.23.026377
URI
http://hdl.handle.net/10203/207528
Appears in Collection
ME-Journal Papers(저널논문)
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