A novel apparatus to measure small magnetic birefringences is described. It is based on a high-finesse Fabry–Perot cavity, to which a Nd:YAG laser is frequency locked, and on a 1.1-T permanent dipole magnet. We report the new measurement of the magnetic anisotropy of the refraction index (Cotton–Mouton effect) for molecular oxygen at lambda = 1064 nm, T = 20 °C. Our result, Delta n(O2) = (-2.29 ± 0.08)10^-12 (B/1 T)^2 (P/1 atm), is consistent with the existing theoretical predictions and falls in line with the previous experimental results taken at different wavelengths.
Brandi, F., Della Valle, F., Micossi, P., De Riva, A.M., Zavattini, G., Perrone, F., et al. (1998). Cotton–Mouton effect of molecular oxygen: a novel measurement. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS, 15(4), 1278-1281 [10.1364/JOSAB.15.001278].
Cotton–Mouton effect of molecular oxygen: a novel measurement
Della Valle, Federico;
1998-01-01
Abstract
A novel apparatus to measure small magnetic birefringences is described. It is based on a high-finesse Fabry–Perot cavity, to which a Nd:YAG laser is frequency locked, and on a 1.1-T permanent dipole magnet. We report the new measurement of the magnetic anisotropy of the refraction index (Cotton–Mouton effect) for molecular oxygen at lambda = 1064 nm, T = 20 °C. Our result, Delta n(O2) = (-2.29 ± 0.08)10^-12 (B/1 T)^2 (P/1 atm), is consistent with the existing theoretical predictions and falls in line with the previous experimental results taken at different wavelengths.
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https://hdl.handle.net/11365/1035040