Precision refractive index measurements of air, N2, O2, Ar, and CO2 with a frequency comb.
We report precision measurements of the refractive indices of dry air, N(2), O(2), Ar, and CO(2), performed by using a frequency comb as the light source in a Mach-Zehnder interferometer setup. Improved dispersion formulas for all gases are derived with a sensitivity level of 10(-9). These results are valid for a wavelength range from 740 to 860 nm and are in good agreement with measurements from other groups.
Institute of Optics, Information and Photonics, Max-Planck Research Group and University Erlangen-Nuremberg, 91058 Erlangen, Germany.
J
J
Zhang
Z H
ZH
Lu
L J
LJ
Wang