Time-resolved diffuse optical spectroscopy up to 1700 nm using a time-gated InGaAs/InP single-photon avalanche diode

I. Bargigia; A. Tosi; A. Bahgat Shehata; A. Della Frera; A. Farina; A. Bassi; P. Taroni; A. Dalla Mora; F. Zappa; A. Pifferi

doi:10.1117/12.889775

14 June 2011 Time-resolved diffuse optical spectroscopy up to 1700 nm using a time-gated InGaAs/InP single-photon avalanche diode

I. Bargigia, A. Tosi, A. Bahgat Shehata, A. Della Frera, A. Farina, A. Bassi, P. Taroni, A. Dalla Mora, F. Zappa, A. Pifferi

Author Affiliations +

Proceedings Volume 8090, Novel Biophotonic Techniques and Applications; 80900U (2011) https://doi.org/10.1117/12.889775
Event: European Conferences on Biomedical Optics, 2011, Munich, Germany

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.

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I. Bargigia, A. Tosi, A. Bahgat Shehata, A. Della Frera, A. Farina, A. Bassi, P. Taroni, A. Dalla Mora, F. Zappa, and A. Pifferi "Time-resolved diffuse optical spectroscopy up to 1700 nm using a time-gated InGaAs/InP single-photon avalanche diode", Proc. SPIE 8090, Novel Biophotonic Techniques and Applications, 80900U (14 June 2011); https://doi.org/10.1117/12.889775

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