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Complex Conjugate Removal in SS Optical Coherence Tomography

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Optical Coherence Tomography

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Abstract

The development of Fourier Domain OCT (FDOCT) systems significantly improved sensitivity and imaging speed and catalyzed the commercialization of OCT technology. However, the transition from time-domain to Fourier domain was not without cost. The complex conjugate ambiguity is a non-trivial artifact resulting from direct Fourier detection in FDOCT. While most FDOCT systems avoid this artifact by limiting their axial imaging range, complex conjugate removal (CCR) in swept-source OCT (SSOCT) seeks to suppress or eliminate the complex conjugate ambiguity. CCR for SSOCT, either by phase-shifting, heterodyning, or optical demodulation, increases the axial imaging range by a factor of 2 compared to conventional FDOCT. This technological development is important in many OCT applications, including ophthalmology since the increased imaging depth is necessary to visualize the entire anterior segment of the human eye.

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Author information

Authors and Affiliations

  1. Fitzpatrick Institute for Photonics and Department of Biomedical Engineering, Duke University, Durham, NC, USA

    Oscar Carrasco-Zevallos

  2. Fitzpatrick Institute for Photonics and Departments of Biomedical Engineering and Ophthalmology, Duke University Medical Center, Durham, NC, USA

    Joseph A. Izatt

Authors
  1. Oscar Carrasco-Zevallos
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  2. Joseph A. Izatt
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Correspondence to Oscar Carrasco-Zevallos .

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Editors and Affiliations

  1. Center for Medical Physics and Biomedical Engineering, Medical University Vienna, General Hospital Vienna, Vienna, Austria

    Wolfgang Drexler

  2. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

    James G. Fujimoto

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Carrasco-Zevallos, O., Izatt, J.A. (2015). Complex Conjugate Removal in SS Optical Coherence Tomography. In: Drexler, W., Fujimoto, J. (eds) Optical Coherence Tomography. Springer, Cham. https://doi.org/10.1007/978-3-319-06419-2_9

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