Fiber-optic interferometric two-dimensional scattering-measurement system.

Journal Article (Journal Article)

We present a fiber-optic interferometric system for measuring depth-resolved scattering in two angular dimensions using Fourier-domain low-coherence interferometry. The system is a unique hybrid of the Michelson and Sagnac interferometer topologies. The collection arm of the interferometer is scanned in two dimensions to detect angular scattering from the sample, which can then be analyzed to determine the structure of the scatterers. A key feature of the system is the full control of polarization of both the illumination and the collection fields, allowing for polarization-sensitive detection, which is essential for two-dimensional angular measurements. System performance is demonstrated using a double-layer microsphere phantom. Experimental data from samples with different sizes and acquired with different polarizations show excellent agreement with Mie theory, producing structural measurements with subwavelength accuracy.

Full Text

Duke Authors

Cited Authors

  • Zhu, Y; Giacomelli, MG; Wax, A

Published Date

  • May 2010

Published In

Volume / Issue

  • 35 / 10

Start / End Page

  • 1641 - 1643

PubMed ID

  • 20479835

Pubmed Central ID

  • PMC2965645

Electronic International Standard Serial Number (EISSN)

  • 1539-4794

International Standard Serial Number (ISSN)

  • 0146-9592

Digital Object Identifier (DOI)

  • 10.1364/ol.35.001641


  • eng