Measuring optical properties of clear and turbid media with broadband spectral interferometry

Peter N.A. Speets, Jeroen Kalkman*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
20 Downloads (Pure)

Abstract

The group index, ng , group velocity dispersion (GVD), and scattering attenuation coefficient, µs, were measured for dilutions of glycerol, ethanol, and Intralipid 20% with water. Experiments were performed with a supercontinuum laser based Mach–Zehnder spectroscopic interferometry setup for wavelengths between 400 and 930 nm. All optical properties could be retrieved from a single calibrated measurement of the interference spectrum. Scattering attenuation was determined from the envelope of the interference. The group index and GVD were retrieved from the unwrapped spectral phase. It was found that the group indices of glycerol and ethanol dilutions are in accordance with the Lorentz–Lorenz mixing formula. The scattering attenuation matches well to a semi-empirical model based on the Twerksy effective packing fraction.

Original languageEnglish
Pages (from-to)4249-4258
JournalApplied Optics
Volume62
Issue number16
DOIs
Publication statusPublished - 2023

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