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Multi-wavelength dual-detection channel system for time-resolved near-infrared spectroscopy
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Paper Abstract

We present a new full-custom instrument for time-domain diffuse optical spectroscopy developed within Horizon 2020 LUCA (Laser and Ultrasound Co-Analyzer for thyroid nodules) project. It features eight different picosecond diode lasers (in the 635 - 1050 nm range), two 1.3 × 1.3 mm2 active-area SiPMs (Silicon PhotoMultipliers) working in single-photon mode and two 10 ps resolution time-to-digital converters. A custom FPGA-based control board manages the instrument and communicates with an external computer via USB connection. The instrument proved state-of-the-art performance: an instrument response function narrower than 160 ps (fullwidth at half-maximum), a long-term measurement stability better than 1%, and an output average optical power higher than 1 mW at 40 MHz. The instrument has been validated with phantom measurements.

Paper Details

Date Published: 1 March 2019
PDF: 9 pages
Proc. SPIE 10874, Optical Tomography and Spectroscopy of Tissue XIII, 1087408 (1 March 2019); doi: 10.1117/12.2509706
Show Author Affiliations
Marco Renna, Politecnico di Milano (Italy)
Mauro Buttafava, Politecnico di Milano (Italy)
Anurag Behera, Politecnico di Milano (Italy)
Marta Zanoletti, Politecnico di Milano (Italy)
Laura Di Sieno, Politecnico di Milano (Italy)
Alberto Dalla Mora, Politecnico di Milano (Italy)
Davide Contini, Politecnico di Milano (Italy)
Alberto Tosi, Politecnico di Milano (Italy)

Published in SPIE Proceedings Vol. 10874:
Optical Tomography and Spectroscopy of Tissue XIII
Sergio Fantini; Bruce J. Tromberg; Eva Marie Sevick-Muraca; Paola Taroni, Editor(s)

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