Please use this identifier to cite or link to this item: https://doi.org/10.1109/JSTQE.2009.2031617
Title: Design of an advanced time-domain diffuse optical tomography system
Authors: Mo, W.
Chen, N. 
Keywords: Optical control
Optical modulation
Optical time-domain reflectometry
Optical tomography
Issue Date: May-2010
Source: Mo, W., Chen, N. (2010-05). Design of an advanced time-domain diffuse optical tomography system. IEEE Journal on Selected Topics in Quantum Electronics 16 (3) : 581-587. ScholarBank@NUS Repository. https://doi.org/10.1109/JSTQE.2009.2031617
Abstract: This paper describes the design of an improved multichannel time-domain diffuse optical tomography (TD-DOT) system. For the spread spectrum TD-DOT, the image quality depends on the stability of the time-resolved signals, which can be affected by fluctuation in the source modulation depth and drift in the detector gain. A microcontroller-based bias controller is designed to lock the bias of a MachZehnder intensity modulator at the positive quadrature point. With additional temperature stabilization over the avalanche photodiodes, the temporal stability of the time-resolved signals has been significantly improved - the fluctuations of the temporal point spread function have been limited to ±2% for a testing period of a few hours. The image quality and reproducibility have been substantially improved with the stabilized signals. © 2006 IEEE.
Source Title: IEEE Journal on Selected Topics in Quantum Electronics
URI: http://scholarbank.nus.edu.sg/handle/10635/66995
ISSN: 1077260X
DOI: 10.1109/JSTQE.2009.2031617
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