使用白光迈克尔逊干涉仪测量折射率和热光系数。

Measurements of refractive indices and thermo-optical coefficients using a white-light Michelson interferometer.

作者信息

Rocha A C P, Silva J R, Lima S M, Nunes L A O, Andrade L H C

出版信息

Appl Opt. 2016 Aug 20;55(24):6639-43. doi: 10.1364/AO.55.006639.

DOI:10.1364/AO.55.006639

Abstract

A dispersive white-light Michelson interferometer was used to determine the wavelength dependence of the refractive index (n) in the visible range from 425 to 775 nm and the thermo-optical coefficient (dn/dT) of fused silica (FS) and borosilicate glass (BK7). For FS, the values obtained for n and dn/dT at 546 nm were 1.46079 and 11.3×10 K, respectively, while the values for BK7 glass were 1.51825 and 2.2×10 K, respectively, which is in good agreement with the literature. The accuracy of the methodology used for n was almost 10, enabling precise spectroscopic characterization of materials across a wide spectral range.

摘要

使用色散白光迈克尔逊干涉仪来确定熔融石英（FS）和硼硅酸盐玻璃（BK7）在425至775nm可见光范围内的折射率（n）和热光系数（dn/dT）与波长的关系。对于FS，在546nm处获得的n和dn/dT值分别为1.46079和11.3×10⁻⁶K⁻¹，而BK7玻璃的值分别为1.51825和2.2×10⁻⁶K⁻¹，这与文献报道吻合良好。用于测量n的方法的精度约为10⁻⁴，能够在很宽的光谱范围内对材料进行精确的光谱表征。