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Publication Detail
A dual-wavelength spread spectrum-based spectroscopic system For time-domain near-infrared diffuse optical imaging
  • Publication Type:
  • Authors:
    Papadimitriou K, Hebden J, Arridge S, Powell S
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  • Publication date:
  • Published proceedings:
    Proceedings of SPIE. Optical Tomography and Spectroscopy of Tissue XIII
  • Volume:
  • Status:
  • Name of conference:
    Optical Tomography and Spectroscopy of Tissue XIII
  • Conference place:
    San Francisco (CA), USA
  • Conference start date:
  • Conference finish date:
  • Language:
  • Keywords:
    field programmable gate array, near infrared spectroscopy, optical transceiver, spread spectrum, time-domain, vertical-cavity surface-emitting laser
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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