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Proceedings Paper

Time-resolved diffuse optical spectroscopy up to 1700 nm using a time-gated InGaAs/InP single-photon avalanche diode
Author(s): I. Bargigia; A. Tosi; A. Bahgat Shehata; A. Della Frera; A. Farina; A. Bassi; P. Taroni; A. Dalla Mora; F. Zappa; A. Pifferi
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Paper Abstract

Time-domain diffuse optical spectroscopy has become a powerful tool to study highly scattering media, mainly in the fields of non-invasive medical diagnostics and quality assessment of food and pharmaceutical products. Up to now this technique has been exploited mostly up to 1100 nm: we extend the spectral range by means of a continuously tunable pulsed laser source at a high repetition rate and a custom InGaAs/InP Single-Photon Avalanche Diode operated in time-gated mode, working up to 1700 nm. The characterization of the system is presented. As a first example of application, we measured the absorption spectrum of collagen powder in the range 1100 - 1700 nm, which could prove useful for breast density assessment.

Paper Details

Date Published: 14 June 2011
PDF: 5 pages
Proc. SPIE 8090, Novel Biophotonic Techniques and Applications, 80900U (14 June 2011); doi: 10.1117/12.889775
Show Author Affiliations
I. Bargigia, Politecnico di Milano (Italy)
A. Tosi, Politecnico di Milano (Italy)
A. Bahgat Shehata, Politecnico di Milano (Italy)
A. Della Frera, Micro Photon Devices S.r.l. (Italy)
A. Farina, Politecnico di Milano (Italy)
A. Bassi, Politecnico di Milano (Italy)
P. Taroni, Politecnico di Milano (Italy)
A. Dalla Mora, Politecnico di Milano (Italy)
F. Zappa, Politecnico di Milano (Italy)
Micro Photon Devices S.r.l. (Italy)
A. Pifferi, Politecnico di Milano (Italy)
Istituto di Fotonica e Nanotecnologie (Italy)


Published in SPIE Proceedings Vol. 8090:
Novel Biophotonic Techniques and Applications
Henricus J. C. M. Sterenborg; I. Alex Vitkin, Editor(s)

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