Polarization-sensitive optical coherence tomography with de-correlated channels

Haitham N. Zaatari, Nate J. Kemp, Taner Akkin, H. Grady Rylander, Thomas E. Milner

Research output: Contribution to journalConference articlepeer-review

Abstract

We describe a Polarization Sensitive Optical Coherence Tomography (PS-OCT) system with de-correlated horizontal and vertical channels. Construction of PS-OCT depth-resolved images is achieved with a scanning bulk Michelson interferometer and a broadband TiAl2O3 femtosecond laser source. We de-correlate and delay horizontal and vertical channels using a birefringent crystal in the source path and calcite prism pairs in the sample and reference paths. Cross-correlation and phase changes between horizontal and vertical channels are measured at different reference-sample optical delays in correlated and de-correlated PS-OCT. PS-OCT with de-correlated (DPS-OCT) channels can broaden applications to include de-correlated Doppler imaging of blood flow and imaging the retinal nerve fiber layer with delayed channels. We achieve a differential delay of 0-400 microns between vertical and horizontal channels by translating the calcite prisms. DPS-OCT system design and experimental measurements are presented and discussed.

Original languageEnglish (US)
Pages (from-to)360-364
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5316
DOIs
StatePublished - Oct 27 2004
EventProgress in Biomedical Optics and Imaging - Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VIII - San Jose, CA, United States
Duration: Jan 26 2004Jan 28 2004

Keywords

  • Birefringence
  • De-correlated channels
  • Polarization sensitive optical coherence tomography

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