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A dual-wavelength spread spectrum-based spectroscopic system for time-domain near-infrared diffuse optical imaging

Research output: Contribution to journalConference paper

Konstantinos I. Papadimitriou, Jeremy C. Hebden, Simon R. Arridge, Samuel Powell

Original languageEnglish
Article number1087421
JournalProceedings of SPIE
Issue numberOptical Tomography and Spectroscopy of Tissue XIII
Published1 Mar 2019
EventOptical Tomography and Spectroscopy of Tissue XIII 2019 - San Francisco, United States
Duration: 4 Feb 20196 Feb 2019


King's Authors


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.

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