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 $11.3\times {10}^{-6}{\mathrm{K}}^{-1}$, respectively, while the values for BK7 glass were 1.51825 and $2.2\times {10}^{-6}{\mathrm{K}}^{-1}$, respectively, which is in good agreement with the literature. The accuracy of the methodology used for $n$ was almost ${10}^{-6}$, enabling precise spectroscopic characterization of materials across a wide spectral range.

© 2016 Optical Society of America

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