Instantaneous complex conjugate resolved spectral domain and swept-source OCT using 3x3 fiber couplers.


Journal Article

We report that the complex conjugate artifact in Fourier domain optical coherence tomography approaches (including spectral domain and swept source OCT) may be resolved by the use of novel interferometer designs based on 3x3 and higher order fiber couplers. Interferometers built from NxN (N>2) truly fused fiber couplers provide simultaneous access to non-complementary phase components of the complex interferometric signal. These phase components may be converted to quadrature components by trigonometric manipulation, then inverse Fourier transformed to obtain A-scans and images with resolved complex conjugate artifact. We demonstrate instantaneous complex conjugate resolved Fourier domain OCT using 3x3 couplers in both spectral domain and swept source implementations. Complex conjugate artifact suppression by factors of ~20dB and ~25dB are demonstrated for spectral domain and swept source implementations, respectively.

Full Text

Duke Authors

Cited Authors

  • Sarunic, M; Choma, MA; Yang, C; Izatt, JA

Published Date

  • February 2005

Published In

Volume / Issue

  • 13 / 3

Start / End Page

  • 957 - 967

PubMed ID

  • 19494959

Pubmed Central ID

  • 19494959

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/opex.13.000957


  • eng