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Proceedings Paper

High-speed high-resolution OCT imaging of the retina with frequency swept lasers at 850 nm
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Paper Abstract

Ophthalmic OCT was performed using a novel, compact external cavity semiconductor laser at ~850 nm. Retinal imaging was demonstrated with a resolution of <7 microns in tissue at a speed of 16,000 axial scans per second. The coherence length of the laser is >10 mm, enabling an axial measurement range of ~2.5 mm. Real-time display and data streaming capabilities enable video-rate imaging of the retina at >30 frames per second. High-definition and three-dimensional imaging were demonstrated on normal retinas. The resolution of <7 microns in the retina is, to our knowledge, the highest resolution achieved in the retina with swept source OCT to date. The long coherence length of the laser enables high-sensitivity measurements over a large axial measurement range. The speed of 16,000 axial scans per second is comparable to current spectrometer-based spectral/Fourier domain OCT systems. The low cost and small footprint of our laser (~10 cm x 20 cm) may enable the development of OCT for novel applications. Further improvements in speed will be possible by using alternative scanning methods.

Paper Details

Date Published: 5 March 2007
PDF: 6 pages
Proc. SPIE 6426, Ophthalmic Technologies XVII, 642603 (5 March 2007); doi: 10.1117/12.699433
Show Author Affiliations
V. J. Srinivasan, Massachusetts Institute of Technology (United States)
R. Huber, Massachusetts Institute of Technology (United States)
I. Gorczynska, Massachusetts Institute of Technology (United States)
D. Adler, Massachusetts Institute of Technology (United States)
J. Y. Jiang, Thorlabs, Inc. (United States)
P. Reisen, Thorlabs, Inc. (United States)
A. E. Cable, Thorlabs, Inc. (United States)
J. G. Fujimoto, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 6426:
Ophthalmic Technologies XVII
Bruce E. Stuck; Michael Belkin; Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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