Zero roll-off retinal MHz-OCT using an FDML-laser


Optical coherence tomography (OCT) applications like ultra-widefield and full eye-length imaging are of high interest for various diagnostic purposes. In swept-source OCT these techniques require a swept light source, which is coherent over the whole imaging depth. We present a zero roll-off 1060 nm Fourier Domain Mode Locked-Laser (FDML-Laser) for retinal OCT imaging at 1.7 MHz A-scan rate and first long-range imaging results with it. Several steps such as improved dispersion compensation and frequency regulation were performed and will be discussed. Besides virtually no loss in OCT signal over the maximum depth range of 4.6 mm and very good dynamic range was observed. Roll-off measurements show no decrease of the point-spread function (PSF), while maintaining a high dynamic range.

Original languageEnglish
Title of host publicationOptical Coherence Imaging Techniques and Imaging in Scattering Media III
EditorsMaciej Wojtkowski, Stephen A. Boppart, Wang-Yuhl Oh
Number of pages3
Publication date19.07.2019
Article number110780S
ISBN (Print)978-151062849-6
Publication statusPublished - 19.07.2019
EventOptical Coherence Imaging Techniques and Imaging in Scattering Media III 2019 - Munich, Germany
Duration: 25.06.201927.06.2019
Conference number: 152624

Research Areas and Centers

  • Academic Focus: Biomedical Engineering


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