Spectral measurement of absorption by spectroscopic frequency-domain optical coherence tomography

A new method of measurement that essentially combines Fourier-domain optica l coherence tomography with spectroscopy is introduced. By use of a windowe d Fourier transform it is possible to obtain, in addition to the object str ucture, spectroscopic information such as the absorption properties of mate rials. The feasibility of this new method for performing depth-resolved spe ctroscopy is demonstrated with a glass filter plate. The results are compar ed with theoretically calculated spectra by use of the well-known spectral characteristics of the light source and the filter plate. (C) 2000 Optical Society of America.