Abstract
We used Fabry–Perot interferometry to measure the refractive indices of a fused silica plate at four different wavelengths ranging from 544 to 1550 nm, giving a detailed analysis on the uncertainty of this experimental method. Because of a small expanded uncertainty of obtained using the experimental method, it was possible to make corrections to the existing Sellmeier formula [J. Opt. Soc. Am. 55, 1205 (1965) [CrossRef] ] for our fused silica sample. The corrected Sellmeier formula resulted in a group index value larger than that evaluated using the Malitson’s Sellmeier formula by . We verified this by comparing it with the group index measured with spectral domain interferometry at 1530 nm.
© 2016 Optical Society of America
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