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

Julian Klee; Jan Philip Kolb; Christin Grill; Wolfgang Draxinger; Tom Pfeiffer; Robert Huber

doi:10.1117/12.2527034

19 July 2019 Zero roll-off retinal MHz-OCT using an FDML-laser

Julian Klee, Jan Philip Kolb, Christin Grill, Wolfgang Draxinger, Tom Pfeiffer, Robert Huber

Proceedings Volume 11078, Optical Coherence Imaging Techniques and Imaging in Scattering Media III; 110780S (2019) https://doi.org/10.1117/12.2527034
Event: European Conferences on Biomedical Optics, 2019, Munich, Germany

Abstract

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.

Citation Download Citation

Julian Klee, Jan Philip Kolb, Christin Grill, Wolfgang Draxinger, Tom Pfeiffer, and Robert Huber "Zero roll-off retinal MHz-OCT using an FDML-laser", Proc. SPIE 11078, Optical Coherence Imaging Techniques and Imaging in Scattering Media III, 110780S (19 July 2019); https://doi.org/10.1117/12.2527034

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KEYWORDS

Optical coherence tomography

Point spread functions

Scanners

Imaging systems

Range imaging

Coherence (optics)

Photodiodes

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