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Optics Letters

Optics Letters


  • Vol. 18, Iss. 12 — Jun. 15, 1993
  • pp: 950–952

Femtosecond transillumination optical coherence tomography

Michael R. Hee, Joseph A. Izatt, Joseph M. Jacobson, James G. Fujimoto, and Eric A. Swanson  »View Author Affiliations

Optics Letters, Vol. 18, Issue 12, pp. 950-952 (1993)

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We describe a new technique, femtosecond transillumination optical coherence tomography, for time-gated imaging of objects embedded in scattering media. Time gating is performed with a fiber-optic interferometer with femtosecond pulses and coherent heterodyne detection to achieve a 130-dB dynamic range. A confocal imaging arrangement provides additional spatial discrimination against multiply scattered light. By time gating ballistic photons, we achieve 125-μm-resolution images of absorbing objects in media 27 scattering mean free paths thick. We derive a fundamental limit on ballistic imaging thickness based on quantum noise considerations.

© 1993 Optical Society of America

Original Manuscript: February 10, 1993
Published: June 15, 1993

Michael R. Hee, Eric A. Swanson, Joseph A. Izatt, Joseph M. Jacobson, and James G. Fujimoto, "Femtosecond transillumination optical coherence tomography," Opt. Lett. 18, 950-952 (1993)

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