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A dual-wavelength spread spectrum-based spectroscopic system For time-domain near-infrared diffuse optical imaging
Author(s): Konstantinos I. Papadimitriou; Jeremy C. Hebden; Simon R. Arridge; Samuel Powell
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Paper Abstract

We advance our previous research on spread spectrum spectroscopy by adding spectroscopic functionality using a custom-made optical transceiver. The new transceiver module features a 680nm communications-grade verticalcavity surface-emitting laser (VCSEL) and matches the performance of commercial 10Gb/s optical transceivers, which allow for a sub-ns instrument response. The optical power of the VCSEL can be software-adjusted up to 2mW with ∼40μA driving current resolution. This module, combined with a commercially available Gigabit optical transceiver at 850nm, allows us to derive information about the optical properties of tissue-equivalent phantoms and the concentration of various haemodynamic parameters in in vivo measurements.

Paper Details

Date Published: 1 March 2019
PDF: 9 pages
Proc. SPIE 10874, Optical Tomography and Spectroscopy of Tissue XIII, 1087421 (1 March 2019); doi: 10.1117/12.2507992
Show Author Affiliations
Konstantinos I. Papadimitriou, Univ. College London (United Kingdom)
Jeremy C. Hebden, Univ. College London (United Kingdom)
Simon R. Arridge, Univ. College London (United Kingdom)
Samuel Powell, King's College London (United Kingdom)

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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