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Proceedings Paper

Investigation of highly scattering media using near-infrared continuous wave tunable semiconductor laser
Author(s): Udo Haberland; Walter Ruetten; Vladimir Blazek; Hans Juergen Schmitt
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Paper Abstract

The principle of frequency modulated continuous wave radar (FMCW) has been applied to optical frequencies. By tuning the wavelength of a semiconductor laser with time, high resolution imaging in scattering media is possible. The spatial resolution depends mainly on the tuning range of the laser. Several tuning principles to be used in optical FMCW are discussed. As a coherent detection scheme with small bandwidth is used, low noise and high dynamic range are expected. The basic theory is outlined and experimental results are presented. Nonlinear tuning characteristics that degrade the resolution are discussed and interferometric methods enhancing system characteristics are proposed.

Paper Details

Date Published: 30 May 1995
PDF: 10 pages
Proc. SPIE 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation, (30 May 1995); doi: 10.1117/12.209999
Show Author Affiliations
Udo Haberland, Technical Univ. of Aachen (Germany)
Walter Ruetten, Technical Univ. of Aachen (Germany)
Vladimir Blazek, Technical Univ. of Aachen (Germany)
Hans Juergen Schmitt, Technical Univ. of Aachen (Germany)


Published in SPIE Proceedings Vol. 2389:
Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation
Britton Chance; Robert R. Alfano, Editor(s)

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