Extended coherence length megahertz FDML and its application for anterior segment imaging

Wolfgang Wieser, Thomas Klein, Desmond C. Adler, Francois Trépanier, Christoph M. Eigenwillig, Sebastian Karpf, Joseph M. Schmitt, Robert Huber*

*Corresponding author for this work
56 Citations (Scopus)

Abstract

We present a 1300 nm Fourier domain mode locked (FDML) laser for optical coherence tomography (OCT) that combines both, a high 1.6 MHz wavelength sweep rate and an ultra-long instantaneous coherence length for rapid volumetric deep field imaging. By reducing the dispersion in the fiber delay line of the FDML laser, the instantaneous coherence length and hence the available imaging range is approximately quadrupled compared to previously published MHz-FDML setups, the imaging speed is increased by a factor of 16 compared to previous extended coherence length results. We present a detailed characterization of the FDML laser performance. We demonstrate for the first time MHz-OCT imaging of the anterior segment of the human eye. The OCT system provides enough imaging depth to cover the whole range from the top surface of the cornea down to the crystalline lens.

Original languageEnglish
JournalBiomedical Optics Express
Volume3
Issue number10
Pages (from-to)2647-2657
Number of pages11
DOIs
Publication statusPublished - 01.01.2012

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