RT Journal Article T1 Accuracy of refractive index spectroscopy by broadband interferometry A1 Arosa Lobato, Yago A1 Rodríguez-Fernández, Carlos Damián A1 Doval Casas, Alejandro A1 López Lago, María Elena A1 Fuente Carballo, Raúl de la K1 Dispersion K1 Spectroscopy K1 Spectral interferometry K1 Uncertainty AB Uncertainties of refractive and group index in dispersion measurement by spectrally resolved white light interferometry are deeply analyzed. First, the contribution to uncertainty of the different parameters affecting both indices is identified. Afterwards, results are presented for a 1.5 mm thick fused silica sample over a broad spectral range, from 400 to 1000 nm, and the effects that mostly deteriorate the measurement accuracy are established. Finally, the different contributions are quadratically combined to determine the total uncertainty of the two indices PB Elsevier YR 2022 FD 2022 LK http://hdl.handle.net/10347/27295 UL http://hdl.handle.net/10347/27295 LA eng NO Measurement 187 (2022) 110225 NO The financial support of the Spanish Ministry of Economy and Competitiveness through the coordinated grants MAT2017-89239-C2-1-P is gratefully acknowledged. Moreover, this work was funded by the Xunta de Galicia and FEDER (ED431D 2017/06, ED431E2018/08, GRC 508 ED431C 2020/10) DS Minerva RD 1 may 2026