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Proceedings Paper

Large depth high-precision FMCW tomography using a distributed feedback laser array
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Paper Abstract

Swept-source optical coherence tomography (SS-OCT) has been widely employed in the medical industry for the high resolution imaging of subsurface biological structures. SS-OCT typically exhibits axial resolutions on the order of tens of microns at speeds of hundreds of kilohertz. Using the same coherent heterodyne detection technique, frequency modulated continuous wave (FMCW) ladar has been used for highly precise ranging for distances up to kilometers. Distributed feedback lasers (DFBs) have been used as a simple and inexpensive source for FMCW ranging. Here, we use a bandwidth-combined DFB array for sub-surface volume imaging at a 27 μm axial resolution over meters of distance. 2D and 3D tomographic images of several semi-transparent and diffuse objects at distances up to 10 m will be presented.

Paper Details

Date Published: 22 February 2018
PDF: 9 pages
Proc. SPIE 10539, Photonic Instrumentation Engineering V, 1053906 (22 February 2018);
Show Author Affiliations
Thomas DiLazaro, U.S. Army Night Vision and Electronic Sensors Directorate (United States)
George Nehmetallah, The Catholic Univ. of America (United States)

Published in SPIE Proceedings Vol. 10539:
Photonic Instrumentation Engineering V
Yakov G. Soskind, Editor(s)

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