Papers Published

1. R. N. Graf and A. Wax, Temporal coherence and time-frequency distributions in spectroscopic optical coherence tomography, Journal Of The Optical Society Of America A-optics Image Science And Vision, vol. 24 no. 8 (August, 2007), pp. 2186 -- 2195 .
   (last updated on 2009/09/02)

   Abstract:
   Traditional analysis of spectroscopic optical coherence tomography (SOCT) signals is limited by an uncertainty relationship between time (depth) and frequency (wavelength). The use of a bilinear time-frequency distribution for analysis, such as those that compose Cohen's class of functions, may provide a way to avoid this limitation. Here we present the relationship between traditional SOCT analysis and the relevant Cohen class functions: the Wigner and Choi-Williams distributions. While cross terms that arise in these bilinear time-frequency distributions have been viewed as an artifact, here we identify these terms with temporal coherence, which contains significant information about the signal through phase relationships. The utility of time-frequency distributions is illustrated through analysis of calculated signals. (c) 2007 Optical Society of America.