Numerical dispersion compensation for Partial Coherence Interferometry and Optical Coherence Tomography

Dispersive samples introduce a wavelength dependent phase distortion to the probe beam. This leads to a noticeable loss of depth resolution in high resolution OCT using broadband light sources. The standard technique to avoid this consequence is to balance the dispersion of the sample by arranging a dispersive material in the reference arm. However, the impact of dispersion is depth dependent. A corresponding depth dependent dispersion balancing technique is diffcult to implement. Here we present a numerical dispersion compensation technique for Partial Coherence Interferometry (PCI) and Optical Coherence Tomography (OCT) based on numerical correlation of the depth scan signal with a depth variant kernel. It can be used a posteriori and provides depth dependent dispersion compensation. Examples of dispersion compensated depth scan signals obtained from microscope cover glasses are presented. (C) 2001 Optical Society of America.

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Optics Express, 9, 12, 610-615
Univ Vienna, Inst Med Phys, A-1090 Vienna, Austria. Nicholas Copernicus Univ, Dept Phys, PL-87100 Torun, Poland. EPFL, Inst Opt Appl, CH-1015 Lausanne, Switzerland. Fercher, AF, Univ Vienna, Inst Med Phys, Waehringer 13, A-1090 Vienna, Austria.
ISI Document Delivery No.: 498AT
Times Cited: 15
Cited Reference Count: 12
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 Record created 2006-10-03, last modified 2018-03-17

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