Open AccessPortable, large-bandwidth time-resolved system for diffuse optical spectroscopy
Author(s) -
Andrea Bassi,
Andrea Farina,
Cosimo D’Andrea,
Antonio Pifferi,
Gianluca Valentini,
Rinaldo Cubeddu
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.014482
Subject(s) - supercontinuum , optics , photon diffusion , photon counting , materials science , transmittance , spectroscopy , laser , wavelength , photon , scattering , optoelectronics , physics , photonic crystal fiber , light source , quantum mechanics
We report the development of a compact time-resolved system for the measurement of the optical properties of highly scattering media over a bandwidth of 600-1000 nm. The instrument is based on a fiber laser generating supercontinuum radiation, that is spectrally dispersed and sequentially used to illuminate the sample. A single photon avalanche photo-diode in combination with time correlated single-photon counting is used to recover the time-dispersion curve at each wavelength, both fitted by the diffusion equation. Transmittance measurements performed on calibrated epoxy phantoms and in-vivo on female breast are presented, showing good agreement with previous reports.