Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668, Warsaw, Poland.
Laser and Fibre Optics Centre, Department of Physics, School of Physical Sciences, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
Sci Data. 2023 Dec 13;10(1):894. doi: 10.1038/s41597-023-02819-3.
Chromatic dispersion and thermal coefficients of 6 hygroscopic liquids: ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol (propane-1, 2-diol), and glycerol were measured in the range from 390 to 1070 nm for temperatures from 1 to 45 °C. A modified Abbe refractometer was utilised. Special care was taken to avoid contaminating the liquids under the test with water and solid particles. The measurement uncertainties were analysed. It was noticed that (in the given range and within the available measurement accuracy) the dependence of the refractive indices on the wavelength and temperature could be considered independently. Thus, thermal coefficients were found for each wavelength used, and their weak dependence on the wavelength was recognised. Then the Sellmeier equation was fitted to the experimental results for each temperature.
测量了 6 种吸湿液体（乙二醇、二甘醇、三甘醇、四甘醇、丙二醇（丙烷-1,2-二醇）和甘油）在 1 至 45°C 温度范围内从 390 至 1070nm 的色散系数和热系数。使用了改进的阿贝折射仪。特别注意避免试验中的液体受到水和固体颗粒的污染。分析了测量不确定度。注意到（在所给出的范围内和现有测量精度内）折射率对波长和温度的依赖性可以独立考虑。因此，为每个使用的波长找到了热系数，并认识到它们对波长的弱依赖性。然后，为每个温度拟合了Sellmeier 方程到实验结果。
