Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Spectroscopic phase-dispersion optical coherence tomography measurements of scattering phantoms



Shellee D. Dyer, Tasshi Dennis, Lara Roberson, Shelley M. Etzel, Thomas Germer, Andrew Dienstfrey


We demonstrate a novel technique to determine the size of Mie scatterers with high sensitivity. Our technique is based on spectral domain optical coherence tomography measurements of the phase dispersion that is induced by the scattering process. We use both Mie scattering predictions and dispersion measurements of phantoms to show that the scattering dispersion is very sensitive to small changes in the size and/or refractive index of the scatterer. We also show the light scattered from a single sphere is, in some cases, non-minimum phase. Therefore the phase is independent of the intensity of the scattered light, and both intensity and phase must be measured directly in order to characterize more completely the scattering problem. Phase dispersion measurements may have application to distinguishing the size and refractive index of scattering particles in biological tissue samples.
Optics Express


Dispersion, Interferometry, Mie Theory, Optical Coherence Tomography, Phase Measurement, Scattering Measurements.


Dyer, S. , Dennis, T. , Roberson, L. , Etzel, S. , Germer, T. and Dienstfrey, A. (2006), Spectroscopic phase-dispersion optical coherence tomography measurements of scattering phantoms, Optics Express, [online], (Accessed May 22, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created September 3, 2006, Updated October 12, 2021