Skin remittance kinetics in the spectral range of 550 - 790 nm

An experimental method for remitted photon time-of-flight (PTOF) estimation in human skin in vivo is developed and tested. Remitted light signals are obtained using a picosecond broadband laser and a set of narrowband interference filters centred at 550, 600, 650, 700, 750 and 790 nm. Four different...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2019-01, Vol.49 (1), p.2-5
Main Authors: Osis, M., Lukinsone, V., Latvels, J., Kuzmina, I., Rubins, U., Spigulis, J.
Format: Article
Language:English
Subjects:
Broadband
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
FIBERS
FILTERS
IN VIVO
In vivo methods and tests
INTERFERENCE
KINETICS
LASERS
light scattering in skin
Narrowband
optical path length
photon time-of-flight
PHOTONS
picosecond laser applications
SIGNALS
SKIN
Spectra
TIME-OF-FLIGHT METHOD
VISIBLE RADIATION
WAVELENGTHS
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Summary:An experimental method for remitted photon time-of-flight (PTOF) estimation in human skin in vivo is developed and tested. Remitted light signals are obtained using a picosecond broadband laser and a set of narrowband interference filters centred at 550, 600, 650, 700, 750 and 790 nm. Four different distances of 8, 12, 16 and 20 mm between the source and detector fibres are used. Measurements are performed at different wavelengths and distance combinations. Direct kinetic measurements make it possible to assess the mean photon path length in skin at various spectral regions. Results generally correspond to theoretical expectations; however, no clear dependence on wavelengths in the spectral range 650-790 nm is observed. This study shows a promising opportunity to use this kind of measurement system in the future research of PTOF in human skin.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL16911