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

Peter N.A. Speets; Jeroen Kalkman

doi:10.1364/AO.488543

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

Peter N.A. Speets, Jeroen Kalkman^*

^*Corresponding author for this work

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Abstract

The group index, n_g , group velocity dispersion (GVD), and scattering attenuation coefficient, µ_s, 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 language	English
Pages (from-to)	4249-4258
Journal	Applied Optics
Volume	62
Issue number	16
DOIs	https://doi.org/10.1364/AO.488543
Publication status	Published - 2023

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title = "Measuring optical properties of clear and turbid media with broadband spectral interferometry",

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.",

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doi = "10.1364/AO.488543",

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AU - Kalkman, Jeroen

PY - 2023

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N2 - 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.

AB - 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.

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VL - 62

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JO - Applied Optics

JF - Applied Optics

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ER -

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

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