Numerical dispersion compensation for partial coherence interferometry and optical coherence tomography

A. F. Fercher, C. K. Hitzenberger, M. Sticker, Robert Zawadzki, B. Karamata, T. Lasser

Research output: Contribution to journalArticle

116 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)610-615
Number of pages6
JournalOptics Express
Volume9
Issue number12
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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