This paper provides details of a spectroscopic investigation of a thermal ⁸⁷Rb atomic vapour. The experiment was conducted with an external magnetic field of 1.5T in the Voigt geometry. Very good quantitative agreement between experimental data and theory is found for all four Stokes parameters—with RMS errors of ∼1.5% in all cases. From the fits to our experimental data a value for the magnetic field strength is extracted, along with the angle between the magnetic field and the polarisation of the light. The effects of the cell window birefringence on the optical rotation signals are characterised. This allows us to carry out precise measurements at a high field strength and arbitrary geometries, allowing further development of possible areas of application for atomic magnetometers.

本文详细介绍了热⁸⁷ Rb原子蒸气的光谱研究。实验是在Voigt几何结构的1.5T外部磁场下进行的。对于所有四个斯托克斯参数，实验数据与理论之间都具有很好的定量一致性，在所有情况下均方根误差均约为1.5％。从对我们的实验数据的拟合中，提取出磁场强度值以及磁场和光的偏振之间的夹角。表征了单元窗口双折射对旋光信号的影响。这使我们能够在高场强和任意几何形状下进行精确测量，从而可以进一步开发原子磁力计的可能应用领域。