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Optics Letters

Optics Letters


  • Vol. 26, Iss. 10 — May. 15, 2001
  • pp: 686–688

Phase-dispersion optical tomography

Changhuei Yang, Adam Wax, Ramachandra R. Dasari, and Michael S. Feld  »View Author Affiliations

Optics Letters, Vol. 26, Issue 10, pp. 686-688 (2001)

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We report on phase-dispersion optical tomography, a new imaging technique based on phase measurements using low-coherence interferometry. The technique simultaneously probes the target with fundamental and second-harmonic light and interferometrically measures the relative phase shift of the backscattered light fields. This phase change can arise either from reflection at an interface within a sample or from bulk refraction. We show that this highly sensitive (~5°) phase technique can complement optical coherence tomography, which measures electric field amplitude, by revealing otherwise undetectable dispersive variations in the sample.

© 2001 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(110.4500) Imaging systems : Optical coherence tomography
(180.3170) Microscopy : Interference microscopy
(240.6700) Optics at surfaces : Surfaces

Changhuei Yang, Adam Wax, Ramachandra R. Dasari, and Michael S. Feld, "Phase-dispersion optical tomography," Opt. Lett. 26, 686-688 (2001)

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