A Compact Two-Wavelength Time-Domain NIRS System Based on SiPM and Pulsed Diode Lasers

IEEE Photonics Journal

Alberto Tosi¹  Franco Zappa¹  Mauro Buttafava¹  Marco Renna¹  Davide Tamborini¹  Alberto Dalla Mora²  Antonio Pifferi²  Davide Contini²  Edoardo Martinenghi²  Alessandro Torricelli² 

[1] Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy;Dipartimento di Fisica, Politecnico di Milano, Milan, Italy;

关键词: Time-domain;    diffuse optics;    near-infrared spectroscopy;    single-photon;    silicon photomultiplier;    pulsed diode laser;   

DOI  :  10.1109/JPHOT.2016.2632061

来源: DOAJ

【 摘 要 】

This paper presents a complete, compact, and low power consumption instrument designed for time-domain near-infrared spectroscopy. It employs two custom-designed pulsed diode lasers (operating at 830 and 670 nm, with average optical power higher than 2 mW at 40 MHz repetition frequency), a single-photon detection module (based on a 1 mm² active area silicon photomultiplier), and a custom time-to-digital converter with 10 ps time resolution. The system experimental characterization shows an instrument response function narrower than 300 ps (full-width at half maximum), with measurement stability better than ±1% over several hours of operation. The instrument, which is housed into a compact aluminum case (size 200 × 160 × 50 mm³), is specifically tailored for portability and ease of operation, hence fostering the diffusion of time-domain diffuse optics techniques. Thanks to a total power consumption lower than 10 W, this system is suitable for battery operation, thus enabling on-field measurements.

【 授权许可】

Unknown